Merge remote-tracking branch 'google/android-samsung-3.0-jb' into HEAD

Reverted ad-hoc support for now

Conflicts:
	drivers/net/wireless/bcmdhd/bcmsdh_sdmmc_linux.c
	drivers/net/wireless/bcmdhd/dhd_linux.c
	drivers/net/wireless/bcmdhd/wl_android.c
	drivers/net/wireless/bcmdhd/wl_cfg80211.c

Change-Id: Ibaa7a841b177c86a235828e94be5b870f0ac090e

28 files changed, 646 insertions, 95 deletions

diff --git a/drivers/media/dvb/dvb-usb/dib0700_core.c b/drivers/media/dvb/dvb-usb/dib0700_core.c
index 5eb91b4..a224e94 100644
--- a/drivers/media/dvb/dvb-usb/dib0700_core.c
+++ b/drivers/media/dvb/dvb-usb/dib0700_core.c
@@ -30,6 +30,11 @@ int dib0700_get_version(struct dvb_usb_device *d, u32 *hwversion,
 	struct dib0700_state *st = d->priv;
 	int ret;
 
+	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
+		deb_info("could not acquire lock");
+		return 0;
+	}
+
 	ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0),
 				  REQUEST_GET_VERSION,
 				  USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
@@ -46,6 +51,7 @@ int dib0700_get_version(struct dvb_usb_device *d, u32 *hwversion,
 	if (fwtype != NULL)
 		*fwtype     = (st->buf[12] << 24) | (st->buf[13] << 16) |
 			(st->buf[14] << 8) | st->buf[15];
+	mutex_unlock(&d->usb_mutex);
 	return ret;
 }
 
@@ -108,7 +114,12 @@ int dib0700_ctrl_rd(struct dvb_usb_device *d, u8 *tx, u8 txlen, u8 *rx, u8 rxlen
 int dib0700_set_gpio(struct dvb_usb_device *d, enum dib07x0_gpios gpio, u8 gpio_dir, u8 gpio_val)
 {
 	struct dib0700_state *st = d->priv;
-	s16 ret;
+	int ret;
+
+	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
+		deb_info("could not acquire lock");
+		return 0;
+	}
 
 	st->buf[0] = REQUEST_SET_GPIO;
 	st->buf[1] = gpio;
@@ -116,6 +127,7 @@ int dib0700_set_gpio(struct dvb_usb_device *d, enum dib07x0_gpios gpio, u8 gpio_
 
 	ret = dib0700_ctrl_wr(d, st->buf, 3);
 
+	mutex_unlock(&d->usb_mutex);
 	return ret;
 }
 
@@ -125,6 +137,11 @@ static int dib0700_set_usb_xfer_len(struct dvb_usb_device *d, u16 nb_ts_packets)
 	int ret;
 
 	if (st->fw_version >= 0x10201) {
+		if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
+			deb_info("could not acquire lock");
+			return 0;
+		}
+
 		st->buf[0] = REQUEST_SET_USB_XFER_LEN;
 		st->buf[1] = (nb_ts_packets >> 8) & 0xff;
 		st->buf[2] = nb_ts_packets & 0xff;
@@ -132,6 +149,7 @@ static int dib0700_set_usb_xfer_len(struct dvb_usb_device *d, u16 nb_ts_packets)
 		deb_info("set the USB xfer len to %i Ts packet\n", nb_ts_packets);
 
 		ret = dib0700_ctrl_wr(d, st->buf, 3);
+		mutex_unlock(&d->usb_mutex);
 	} else {
 		deb_info("this firmware does not allow to change the USB xfer len\n");
 		ret = -EIO;
@@ -208,6 +226,10 @@ static int dib0700_i2c_xfer_new(struct i2c_adapter *adap, struct i2c_msg *msg,
 
 		} else {
 			/* Write request */
+			if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
+				deb_info("could not acquire lock");
+				return 0;
+			}
 			st->buf[0] = REQUEST_NEW_I2C_WRITE;
 			st->buf[1] = msg[i].addr << 1;
 			st->buf[2] = (en_start << 7) | (en_stop << 6) |
@@ -227,6 +249,7 @@ static int dib0700_i2c_xfer_new(struct i2c_adapter *adap, struct i2c_msg *msg,
 						 USB_TYPE_VENDOR | USB_DIR_OUT,
 						 0, 0, st->buf, msg[i].len + 4,
 						 USB_CTRL_GET_TIMEOUT);
+			mutex_unlock(&d->usb_mutex);
 			if (result < 0) {
 				deb_info("i2c write error (status = %d)\n", result);
 				break;
@@ -249,6 +272,10 @@ static int dib0700_i2c_xfer_legacy(struct i2c_adapter *adap,
 
 	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
 		return -EAGAIN;
+	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
+		deb_info("could not acquire lock");
+		return 0;
+	}
 
 	for (i = 0; i < num; i++) {
 		/* fill in the address */
@@ -279,6 +306,7 @@ static int dib0700_i2c_xfer_legacy(struct i2c_adapter *adap,
 				break;
 		}
 	}
+	mutex_unlock(&d->usb_mutex);
 	mutex_unlock(&d->i2c_mutex);
 
 	return i;
@@ -337,7 +365,12 @@ static int dib0700_set_clock(struct dvb_usb_device *d, u8 en_pll,
 	u16 pll_loopdiv, u16 free_div, u16 dsuScaler)
 {
 	struct dib0700_state *st = d->priv;
-	s16 ret;
+	int ret;
+
+	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
+		deb_info("could not acquire lock");
+		return 0;
+	}
 
 	st->buf[0] = REQUEST_SET_CLOCK;
 	st->buf[1] = (en_pll << 7) | (pll_src << 6) |
@@ -352,6 +385,7 @@ static int dib0700_set_clock(struct dvb_usb_device *d, u8 en_pll,
 	st->buf[9] =  dsuScaler         & 0xff; /* LSB */
 
 	ret = dib0700_ctrl_wr(d, st->buf, 10);
+	mutex_unlock(&d->usb_mutex);
 
 	return ret;
 }
@@ -360,10 +394,16 @@ int dib0700_set_i2c_speed(struct dvb_usb_device *d, u16 scl_kHz)
 {
 	struct dib0700_state *st = d->priv;
 	u16 divider;
+	int ret;
 
 	if (scl_kHz == 0)
 		return -EINVAL;
 
+	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
+		deb_info("could not acquire lock");
+		return 0;
+	}
+
 	st->buf[0] = REQUEST_SET_I2C_PARAM;
 	divider = (u16) (30000 / scl_kHz);
 	st->buf[1] = 0;
@@ -379,7 +419,11 @@ int dib0700_set_i2c_speed(struct dvb_usb_device *d, u16 scl_kHz)
 	deb_info("setting I2C speed: %04x %04x %04x (%d kHz).",
 		(st->buf[2] << 8) | (st->buf[3]), (st->buf[4] << 8) |
 		st->buf[5], (st->buf[6] << 8) | st->buf[7], scl_kHz);
-	return dib0700_ctrl_wr(d, st->buf, 8);
+
+	ret = dib0700_ctrl_wr(d, st->buf, 8);
+	mutex_unlock(&d->usb_mutex);
+
+	return ret;
 }
 
 
@@ -515,6 +559,11 @@ int dib0700_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
 		}
 	}
 
+	if (mutex_lock_interruptible(&adap->dev->usb_mutex) < 0) {
+		deb_info("could not acquire lock");
+		return 0;
+	}
+
 	st->buf[0] = REQUEST_ENABLE_VIDEO;
 	/* this bit gives a kind of command,
 	 * rather than enabling something or not */
@@ -548,7 +597,10 @@ int dib0700_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
 
 	deb_info("data for streaming: %x %x\n", st->buf[1], st->buf[2]);
 
-	return dib0700_ctrl_wr(adap->dev, st->buf, 4);
+	ret = dib0700_ctrl_wr(adap->dev, st->buf, 4);
+	mutex_unlock(&adap->dev->usb_mutex);
+
+	return ret;
 }
 
 int dib0700_change_protocol(struct rc_dev *rc, u64 rc_type)
@@ -557,6 +609,11 @@ int dib0700_change_protocol(struct rc_dev *rc, u64 rc_type)
 	struct dib0700_state *st = d->priv;
 	int new_proto, ret;
 
+	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
+		deb_info("could not acquire lock");
+		return 0;
+	}
+
 	st->buf[0] = REQUEST_SET_RC;
 	st->buf[1] = 0;
 	st->buf[2] = 0;
@@ -567,23 +624,29 @@ int dib0700_change_protocol(struct rc_dev *rc, u64 rc_type)
 	else if (rc_type == RC_TYPE_NEC)
 		new_proto = 0;
 	else if (rc_type == RC_TYPE_RC6) {
-		if (st->fw_version < 0x10200)
-			return -EINVAL;
+		if (st->fw_version < 0x10200) {
+			ret = -EINVAL;
+			goto out;
+		}
 
 		new_proto = 2;
-	} else
-		return -EINVAL;
+	} else {
+		ret = -EINVAL;
+		goto out;
+	}
 
 	st->buf[1] = new_proto;
 
 	ret = dib0700_ctrl_wr(d, st->buf, 3);
 	if (ret < 0) {
 		err("ir protocol setup failed");
-		return ret;
+		goto out;
 	}
 
 	d->props.rc.core.protocol = rc_type;
 
+out:
+	mutex_unlock(&d->usb_mutex);
 	return ret;
 }
 
diff --git a/drivers/media/dvb/frontends/dib0070.c b/drivers/media/dvb/frontends/dib0070.c
index 1d47d4d..dc1cb17 100644
--- a/drivers/media/dvb/frontends/dib0070.c
+++ b/drivers/media/dvb/frontends/dib0070.c
@@ -27,6 +27,7 @@
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/i2c.h>
+#include <linux/mutex.h>
 
 #include "dvb_frontend.h"
 
@@ -78,10 +79,18 @@ struct dib0070_state {
 	struct i2c_msg msg[2];
 	u8 i2c_write_buffer[3];
 	u8 i2c_read_buffer[2];
+	struct mutex i2c_buffer_lock;
 };
 
-static uint16_t dib0070_read_reg(struct dib0070_state *state, u8 reg)
+static u16 dib0070_read_reg(struct dib0070_state *state, u8 reg)
 {
+	u16 ret;
+
+	if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+		dprintk("could not acquire lock");
+		return 0;
+	}
+
 	state->i2c_write_buffer[0] = reg;
 
 	memset(state->msg, 0, 2 * sizeof(struct i2c_msg));
@@ -96,13 +105,23 @@ static uint16_t dib0070_read_reg(struct dib0070_state *state, u8 reg)
 
 	if (i2c_transfer(state->i2c, state->msg, 2) != 2) {
 		printk(KERN_WARNING "DiB0070 I2C read failed\n");
-		return 0;
-	}
-	return (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+		ret = 0;
+	} else
+		ret = (state->i2c_read_buffer[0] << 8)
+			| state->i2c_read_buffer[1];
+
+	mutex_unlock(&state->i2c_buffer_lock);
+	return ret;
 }
 
 static int dib0070_write_reg(struct dib0070_state *state, u8 reg, u16 val)
 {
+	int ret;
+
+	if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+		dprintk("could not acquire lock");
+		return -EINVAL;
+	}
 	state->i2c_write_buffer[0] = reg;
 	state->i2c_write_buffer[1] = val >> 8;
 	state->i2c_write_buffer[2] = val & 0xff;
@@ -115,9 +134,12 @@ static int dib0070_write_reg(struct dib0070_state *state, u8 reg, u16 val)
 
 	if (i2c_transfer(state->i2c, state->msg, 1) != 1) {
 		printk(KERN_WARNING "DiB0070 I2C write failed\n");
-		return -EREMOTEIO;
-	}
-	return 0;
+		ret = -EREMOTEIO;
+	} else
+		ret = 0;
+
+	mutex_unlock(&state->i2c_buffer_lock);
+	return ret;
 }
 
 #define HARD_RESET(state) do { \
@@ -734,6 +756,7 @@ struct dvb_frontend *dib0070_attach(struct dvb_frontend *fe, struct i2c_adapter
 	state->cfg = cfg;
 	state->i2c = i2c;
 	state->fe  = fe;
+	mutex_init(&state->i2c_buffer_lock);
 	fe->tuner_priv = state;
 
 	if (dib0070_reset(fe) != 0)
diff --git a/drivers/media/dvb/frontends/dib0090.c b/drivers/media/dvb/frontends/dib0090.c
index c9c935a..b174d1c 100644
--- a/drivers/media/dvb/frontends/dib0090.c
+++ b/drivers/media/dvb/frontends/dib0090.c
@@ -27,6 +27,7 @@
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/i2c.h>
+#include <linux/mutex.h>
 
 #include "dvb_frontend.h"
 
@@ -196,6 +197,7 @@ struct dib0090_state {
 	struct i2c_msg msg[2];
 	u8 i2c_write_buffer[3];
 	u8 i2c_read_buffer[2];
+	struct mutex i2c_buffer_lock;
 };
 
 struct dib0090_fw_state {
@@ -208,10 +210,18 @@ struct dib0090_fw_state {
 	struct i2c_msg msg;
 	u8 i2c_write_buffer[2];
 	u8 i2c_read_buffer[2];
+	struct mutex i2c_buffer_lock;
 };
 
 static u16 dib0090_read_reg(struct dib0090_state *state, u8 reg)
 {
+	u16 ret;
+
+	if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+		dprintk("could not acquire lock");
+		return 0;
+	}
+
 	state->i2c_write_buffer[0] = reg;
 
 	memset(state->msg, 0, 2 * sizeof(struct i2c_msg));
@@ -226,14 +236,24 @@ static u16 dib0090_read_reg(struct dib0090_state *state, u8 reg)
 
 	if (i2c_transfer(state->i2c, state->msg, 2) != 2) {
 		printk(KERN_WARNING "DiB0090 I2C read failed\n");
-		return 0;
-	}
+		ret = 0;
+	} else
+		ret = (state->i2c_read_buffer[0] << 8)
+			| state->i2c_read_buffer[1];
 
-	return (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+	mutex_unlock(&state->i2c_buffer_lock);
+	return ret;
 }
 
 static int dib0090_write_reg(struct dib0090_state *state, u32 reg, u16 val)
 {
+	int ret;
+
+	if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+		dprintk("could not acquire lock");
+		return -EINVAL;
+	}
+
 	state->i2c_write_buffer[0] = reg & 0xff;
 	state->i2c_write_buffer[1] = val >> 8;
 	state->i2c_write_buffer[2] = val & 0xff;
@@ -246,13 +266,23 @@ static int dib0090_write_reg(struct dib0090_state *state, u32 reg, u16 val)
 
 	if (i2c_transfer(state->i2c, state->msg, 1) != 1) {
 		printk(KERN_WARNING "DiB0090 I2C write failed\n");
-		return -EREMOTEIO;
-	}
-	return 0;
+		ret = -EREMOTEIO;
+	} else
+		ret = 0;
+
+	mutex_unlock(&state->i2c_buffer_lock);
+	return ret;
 }
 
 static u16 dib0090_fw_read_reg(struct dib0090_fw_state *state, u8 reg)
 {
+	u16 ret;
+
+	if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+		dprintk("could not acquire lock");
+		return 0;
+	}
+
 	state->i2c_write_buffer[0] = reg;
 
 	memset(&state->msg, 0, sizeof(struct i2c_msg));
@@ -262,13 +292,24 @@ static u16 dib0090_fw_read_reg(struct dib0090_fw_state *state, u8 reg)
 	state->msg.len = 2;
 	if (i2c_transfer(state->i2c, &state->msg, 1) != 1) {
 		printk(KERN_WARNING "DiB0090 I2C read failed\n");
-		return 0;
-	}
-	return (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+		ret = 0;
+	} else
+		ret = (state->i2c_read_buffer[0] << 8)
+			| state->i2c_read_buffer[1];
+
+	mutex_unlock(&state->i2c_buffer_lock);
+	return ret;
 }
 
 static int dib0090_fw_write_reg(struct dib0090_fw_state *state, u8 reg, u16 val)
 {
+	int ret;
+
+	if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+		dprintk("could not acquire lock");
+		return -EINVAL;
+	}
+
 	state->i2c_write_buffer[0] = val >> 8;
 	state->i2c_write_buffer[1] = val & 0xff;
 
@@ -279,9 +320,12 @@ static int dib0090_fw_write_reg(struct dib0090_fw_state *state, u8 reg, u16 val)
 	state->msg.len = 2;
 	if (i2c_transfer(state->i2c, &state->msg, 1) != 1) {
 		printk(KERN_WARNING "DiB0090 I2C write failed\n");
-		return -EREMOTEIO;
-	}
-	return 0;
+		ret = -EREMOTEIO;
+	} else
+		ret = 0;
+
+	mutex_unlock(&state->i2c_buffer_lock);
+	return ret;
 }
 
 #define HARD_RESET(state) do {  if (cfg->reset) {  if (cfg->sleep) cfg->sleep(fe, 0); msleep(10);  cfg->reset(fe, 1); msleep(10);  cfg->reset(fe, 0); msleep(10);  }  } while (0)
@@ -2440,6 +2484,7 @@ struct dvb_frontend *dib0090_register(struct dvb_frontend *fe, struct i2c_adapte
 	st->config = config;
 	st->i2c = i2c;
 	st->fe = fe;
+	mutex_init(&st->i2c_buffer_lock);
 	fe->tuner_priv = st;
 
 	if (config->wbd == NULL)
@@ -2471,6 +2516,7 @@ struct dvb_frontend *dib0090_fw_register(struct dvb_frontend *fe, struct i2c_ada
 	st->config = config;
 	st->i2c = i2c;
 	st->fe = fe;
+	mutex_init(&st->i2c_buffer_lock);
 	fe->tuner_priv = st;
 
 	if (dib0090_fw_reset_digital(fe, st->config) != 0)
diff --git a/drivers/media/dvb/frontends/dib7000m.c b/drivers/media/dvb/frontends/dib7000m.c
index 79cb1c2..dbb76d7 100644
--- a/drivers/media/dvb/frontends/dib7000m.c
+++ b/drivers/media/dvb/frontends/dib7000m.c
@@ -11,6 +11,7 @@
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/i2c.h>
+#include <linux/mutex.h>
 
 #include "dvb_frontend.h"
 
@@ -55,6 +56,7 @@ struct dib7000m_state {
 	struct i2c_msg msg[2];
 	u8 i2c_write_buffer[4];
 	u8 i2c_read_buffer[2];
+	struct mutex i2c_buffer_lock;
 };
 
 enum dib7000m_power_mode {
@@ -69,6 +71,13 @@ enum dib7000m_power_mode {
 
 static u16 dib7000m_read_word(struct dib7000m_state *state, u16 reg)
 {
+	u16 ret;
+
+	if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+		dprintk("could not acquire lock");
+		return 0;
+	}
+
 	state->i2c_write_buffer[0] = (reg >> 8) | 0x80;
 	state->i2c_write_buffer[1] = reg & 0xff;
 
@@ -85,11 +94,21 @@ static u16 dib7000m_read_word(struct dib7000m_state *state, u16 reg)
 	if (i2c_transfer(state->i2c_adap, state->msg, 2) != 2)
 		dprintk("i2c read error on %d",reg);
 
-	return (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+	ret = (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+	mutex_unlock(&state->i2c_buffer_lock);
+
+	return ret;
 }
 
 static int dib7000m_write_word(struct dib7000m_state *state, u16 reg, u16 val)
 {
+	int ret;
+
+	if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+		dprintk("could not acquire lock");
+		return -EINVAL;
+	}
+
 	state->i2c_write_buffer[0] = (reg >> 8) & 0xff;
 	state->i2c_write_buffer[1] = reg & 0xff;
 	state->i2c_write_buffer[2] = (val >> 8) & 0xff;
@@ -101,7 +120,10 @@ static int dib7000m_write_word(struct dib7000m_state *state, u16 reg, u16 val)
 	state->msg[0].buf = state->i2c_write_buffer;
 	state->msg[0].len = 4;
 
-	return i2c_transfer(state->i2c_adap, state->msg, 1) != 1 ? -EREMOTEIO : 0;
+	ret = (i2c_transfer(state->i2c_adap, state->msg, 1) != 1 ?
+			-EREMOTEIO : 0);
+	mutex_unlock(&state->i2c_buffer_lock);
+	return ret;
 }
 static void dib7000m_write_tab(struct dib7000m_state *state, u16 *buf)
 {
@@ -1385,6 +1407,7 @@ struct dvb_frontend * dib7000m_attach(struct i2c_adapter *i2c_adap, u8 i2c_addr,
 	demod                   = &st->demod;
 	demod->demodulator_priv = st;
 	memcpy(&st->demod.ops, &dib7000m_ops, sizeof(struct dvb_frontend_ops));
+	mutex_init(&st->i2c_buffer_lock);
 
 	st->timf_default = cfg->bw->timf;
 
diff --git a/drivers/media/dvb/frontends/dib7000p.c b/drivers/media/dvb/frontends/dib7000p.c
index 0c9f40c..292bc19 100644
--- a/drivers/media/dvb/frontends/dib7000p.c
+++ b/drivers/media/dvb/frontends/dib7000p.c
@@ -10,6 +10,7 @@
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/i2c.h>
+#include <linux/mutex.h>
 
 #include "dvb_math.h"
 #include "dvb_frontend.h"
@@ -68,6 +69,7 @@ struct dib7000p_state {
 	struct i2c_msg msg[2];
 	u8 i2c_write_buffer[4];
 	u8 i2c_read_buffer[2];
+	struct mutex i2c_buffer_lock;
 };
 
 enum dib7000p_power_mode {
@@ -81,6 +83,13 @@ static int dib7090_set_diversity_in(struct dvb_frontend *fe, int onoff);
 
 static u16 dib7000p_read_word(struct dib7000p_state *state, u16 reg)
 {
+	u16 ret;
+
+	if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+		dprintk("could not acquire lock");
+		return 0;
+	}
+
 	state->i2c_write_buffer[0] = reg >> 8;
 	state->i2c_write_buffer[1] = reg & 0xff;
 
@@ -97,11 +106,20 @@ static u16 dib7000p_read_word(struct dib7000p_state *state, u16 reg)
 	if (i2c_transfer(state->i2c_adap, state->msg, 2) != 2)
 		dprintk("i2c read error on %d", reg);
 
-	return (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+	ret = (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+	mutex_unlock(&state->i2c_buffer_lock);
+	return ret;
 }
 
 static int dib7000p_write_word(struct dib7000p_state *state, u16 reg, u16 val)
 {
+	int ret;
+
+	if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+		dprintk("could not acquire lock");
+		return -EINVAL;
+	}
+
 	state->i2c_write_buffer[0] = (reg >> 8) & 0xff;
 	state->i2c_write_buffer[1] = reg & 0xff;
 	state->i2c_write_buffer[2] = (val >> 8) & 0xff;
@@ -113,7 +131,10 @@ static int dib7000p_write_word(struct dib7000p_state *state, u16 reg, u16 val)
 	state->msg[0].buf = state->i2c_write_buffer;
 	state->msg[0].len = 4;
 
-	return i2c_transfer(state->i2c_adap, state->msg, 1) != 1 ? -EREMOTEIO : 0;
+	ret = (i2c_transfer(state->i2c_adap, state->msg, 1) != 1 ?
+			-EREMOTEIO : 0);
+	mutex_unlock(&state->i2c_buffer_lock);
+	return ret;
 }
 
 static void dib7000p_write_tab(struct dib7000p_state *state, u16 * buf)
@@ -1646,6 +1667,7 @@ int dib7000p_i2c_enumeration(struct i2c_adapter *i2c, int no_of_demods, u8 defau
 		return -ENOMEM;
 
 	dpst->i2c_adap = i2c;
+	mutex_init(&dpst->i2c_buffer_lock);
 
 	for (k = no_of_demods - 1; k >= 0; k--) {
 		dpst->cfg = cfg[k];
@@ -2324,6 +2346,7 @@ struct dvb_frontend *dib7000p_attach(struct i2c_adapter *i2c_adap, u8 i2c_addr,
 	demod = &st->demod;
 	demod->demodulator_priv = st;
 	memcpy(&st->demod.ops, &dib7000p_ops, sizeof(struct dvb_frontend_ops));
+	mutex_init(&st->i2c_buffer_lock);
 
 	dib7000p_write_word(st, 1287, 0x0003);	/* sram lead in, rdy */
 
@@ -2333,8 +2356,9 @@ struct dvb_frontend *dib7000p_attach(struct i2c_adapter *i2c_adap, u8 i2c_addr,
 	st->version = dib7000p_read_word(st, 897);
 
 	/* FIXME: make sure the dev.parent field is initialized, or else
-		request_firmware() will hit an OOPS (this should be moved somewhere
-		more common) */
+	   request_firmware() will hit an OOPS (this should be moved somewhere
+	   more common) */
+	st->i2c_master.gated_tuner_i2c_adap.dev.parent = i2c_adap->dev.parent;
 
 	dibx000_init_i2c_master(&st->i2c_master, DIB7000P, st->i2c_adap, st->i2c_addr);
 
diff --git a/drivers/media/dvb/frontends/dib8000.c b/drivers/media/dvb/frontends/dib8000.c
index 7d2ea11..fe284d5 100644
--- a/drivers/media/dvb/frontends/dib8000.c
+++ b/drivers/media/dvb/frontends/dib8000.c
@@ -10,6 +10,8 @@
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/i2c.h>
+#include <linux/mutex.h>
+
 #include "dvb_math.h"
 
 #include "dvb_frontend.h"
@@ -37,6 +39,7 @@ struct i2c_device {
 	u8 addr;
 	u8 *i2c_write_buffer;
 	u8 *i2c_read_buffer;
+	struct mutex *i2c_buffer_lock;
 };
 
 struct dib8000_state {
@@ -77,6 +80,7 @@ struct dib8000_state {
 	struct i2c_msg msg[2];
 	u8 i2c_write_buffer[4];
 	u8 i2c_read_buffer[2];
+	struct mutex i2c_buffer_lock;
 };
 
 enum dib8000_power_mode {
@@ -86,24 +90,39 @@ enum dib8000_power_mode {
 
 static u16 dib8000_i2c_read16(struct i2c_device *i2c, u16 reg)
 {
+	u16 ret;
 	struct i2c_msg msg[2] = {
-		{.addr = i2c->addr >> 1, .flags = 0,
-			.buf = i2c->i2c_write_buffer, .len = 2},
-		{.addr = i2c->addr >> 1, .flags = I2C_M_RD,
-			.buf = i2c->i2c_read_buffer, .len = 2},
+		{.addr = i2c->addr >> 1, .flags = 0, .len = 2},
+		{.addr = i2c->addr >> 1, .flags = I2C_M_RD, .len = 2},
 	};
 
+	if (mutex_lock_interruptible(i2c->i2c_buffer_lock) < 0) {
+		dprintk("could not acquire lock");
+		return 0;
+	}
+
+	msg[0].buf    = i2c->i2c_write_buffer;
 	msg[0].buf[0] = reg >> 8;
 	msg[0].buf[1] = reg & 0xff;
+	msg[1].buf    = i2c->i2c_read_buffer;
 
 	if (i2c_transfer(i2c->adap, msg, 2) != 2)
 		dprintk("i2c read error on %d", reg);
 
-	return (msg[1].buf[0] << 8) | msg[1].buf[1];
+	ret = (msg[1].buf[0] << 8) | msg[1].buf[1];
+	mutex_unlock(i2c->i2c_buffer_lock);
+	return ret;
 }
 
 static u16 dib8000_read_word(struct dib8000_state *state, u16 reg)
 {
+	u16 ret;
+
+	if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+		dprintk("could not acquire lock");
+		return 0;
+	}
+
 	state->i2c_write_buffer[0] = reg >> 8;
 	state->i2c_write_buffer[1] = reg & 0xff;
 
@@ -120,7 +139,10 @@ static u16 dib8000_read_word(struct dib8000_state *state, u16 reg)
 	if (i2c_transfer(state->i2c.adap, state->msg, 2) != 2)
 		dprintk("i2c read error on %d", reg);
 
-	return (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+	ret = (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+	mutex_unlock(&state->i2c_buffer_lock);
+
+	return ret;
 }
 
 static u32 dib8000_read32(struct dib8000_state *state, u16 reg)
@@ -135,22 +157,35 @@ static u32 dib8000_read32(struct dib8000_state *state, u16 reg)
 
 static int dib8000_i2c_write16(struct i2c_device *i2c, u16 reg, u16 val)
 {
-	struct i2c_msg msg = {.addr = i2c->addr >> 1, .flags = 0,
-		.buf = i2c->i2c_write_buffer, .len = 4};
+	struct i2c_msg msg = {.addr = i2c->addr >> 1, .flags = 0, .len = 4};
 	int ret = 0;
 
+	if (mutex_lock_interruptible(i2c->i2c_buffer_lock) < 0) {
+		dprintk("could not acquire lock");
+		return -EINVAL;
+	}
+
+	msg.buf    = i2c->i2c_write_buffer;
 	msg.buf[0] = (reg >> 8) & 0xff;
 	msg.buf[1] = reg & 0xff;
 	msg.buf[2] = (val >> 8) & 0xff;
 	msg.buf[3] = val & 0xff;
 
 	ret = i2c_transfer(i2c->adap, &msg, 1) != 1 ? -EREMOTEIO : 0;
+	mutex_unlock(i2c->i2c_buffer_lock);
 
 	return ret;
 }
 
 static int dib8000_write_word(struct dib8000_state *state, u16 reg, u16 val)
 {
+	int ret;
+
+	if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+		dprintk("could not acquire lock");
+		return -EINVAL;
+	}
+
 	state->i2c_write_buffer[0] = (reg >> 8) & 0xff;
 	state->i2c_write_buffer[1] = reg & 0xff;
 	state->i2c_write_buffer[2] = (val >> 8) & 0xff;
@@ -162,7 +197,11 @@ static int dib8000_write_word(struct dib8000_state *state, u16 reg, u16 val)
 	state->msg[0].buf = state->i2c_write_buffer;
 	state->msg[0].len = 4;
 
-	return i2c_transfer(state->i2c.adap, state->msg, 1) != 1 ? -EREMOTEIO : 0;
+	ret = (i2c_transfer(state->i2c.adap, state->msg, 1) != 1 ?
+			-EREMOTEIO : 0);
+	mutex_unlock(&state->i2c_buffer_lock);
+
+	return ret;
 }
 
 static const s16 coeff_2k_sb_1seg_dqpsk[8] = {
@@ -2434,8 +2473,15 @@ int dib8000_i2c_enumeration(struct i2c_adapter *host, int no_of_demods, u8 defau
 	if (!client.i2c_read_buffer) {
 		dprintk("%s: not enough memory", __func__);
 		ret = -ENOMEM;
-		goto error_memory;
+		goto error_memory_read;
+	}
+	client.i2c_buffer_lock = kzalloc(sizeof(struct mutex), GFP_KERNEL);
+	if (!client.i2c_buffer_lock) {
+		dprintk("%s: not enough memory", __func__);
+		ret = -ENOMEM;
+		goto error_memory_lock;
 	}
+	mutex_init(client.i2c_buffer_lock);
 
 	for (k = no_of_demods - 1; k >= 0; k--) {
 		/* designated i2c address */
@@ -2476,8 +2522,10 @@ int dib8000_i2c_enumeration(struct i2c_adapter *host, int no_of_demods, u8 defau
 	}
 
 error:
+	kfree(client.i2c_buffer_lock);
+error_memory_lock:
 	kfree(client.i2c_read_buffer);
-error_memory:
+error_memory_read:
 	kfree(client.i2c_write_buffer);
 
 	return ret;
@@ -2581,6 +2629,8 @@ struct dvb_frontend *dib8000_attach(struct i2c_adapter *i2c_adap, u8 i2c_addr, s
 	state->i2c.addr = i2c_addr;
 	state->i2c.i2c_write_buffer = state->i2c_write_buffer;
 	state->i2c.i2c_read_buffer = state->i2c_read_buffer;
+	mutex_init(&state->i2c_buffer_lock);
+	state->i2c.i2c_buffer_lock = &state->i2c_buffer_lock;
 	state->gpio_val = cfg->gpio_val;
 	state->gpio_dir = cfg->gpio_dir;
 
diff --git a/drivers/media/dvb/frontends/dib9000.c b/drivers/media/dvb/frontends/dib9000.c
index a085588..b931074 100644
--- a/drivers/media/dvb/frontends/dib9000.c
+++ b/drivers/media/dvb/frontends/dib9000.c
@@ -38,6 +38,15 @@ struct i2c_device {
 #define DibInitLock(lock) mutex_init(lock)
 #define DibFreeLock(lock)
 
+struct dib9000_pid_ctrl {
+#define DIB9000_PID_FILTER_CTRL 0
+#define DIB9000_PID_FILTER      1
+	u8 cmd;
+	u8 id;
+	u16 pid;
+	u8 onoff;
+};
+
 struct dib9000_state {
 	struct i2c_device i2c;
 
@@ -99,6 +108,10 @@ struct dib9000_state {
 	struct i2c_msg msg[2];
 	u8 i2c_write_buffer[255];
 	u8 i2c_read_buffer[255];
+	DIB_LOCK demod_lock;
+	u8 get_frontend_internal;
+	struct dib9000_pid_ctrl pid_ctrl[10];
+	s8 pid_ctrl_index; /* -1: empty list; -2: do not use the list */
 };
 
 static const u32 fe_info[44] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
@@ -1743,19 +1756,56 @@ EXPORT_SYMBOL(dib9000_set_gpio);
 int dib9000_fw_pid_filter_ctrl(struct dvb_frontend *fe, u8 onoff)
 {
 	struct dib9000_state *state = fe->demodulator_priv;
-	u16 val = dib9000_read_word(state, 294 + 1) & 0xffef;
+	u16 val;
+	int ret;
+
+	if ((state->pid_ctrl_index != -2) && (state->pid_ctrl_index < 9)) {
+		/* postpone the pid filtering cmd */
+		dprintk("pid filter cmd postpone");
+		state->pid_ctrl_index++;
+		state->pid_ctrl[state->pid_ctrl_index].cmd = DIB9000_PID_FILTER_CTRL;
+		state->pid_ctrl[state->pid_ctrl_index].onoff = onoff;
+		return 0;
+	}
+
+	DibAcquireLock(&state->demod_lock);
+
+	val = dib9000_read_word(state, 294 + 1) & 0xffef;
 	val |= (onoff & 0x1) << 4;
 
 	dprintk("PID filter enabled %d", onoff);
-	return dib9000_write_word(state, 294 + 1, val);
+	ret = dib9000_write_word(state, 294 + 1, val);
+	DibReleaseLock(&state->demod_lock);
+	return ret;
+
 }
 EXPORT_SYMBOL(dib9000_fw_pid_filter_ctrl);
 
 int dib9000_fw_pid_filter(struct dvb_frontend *fe, u8 id, u16 pid, u8 onoff)
 {
 	struct dib9000_state *state = fe->demodulator_priv;
+	int ret;
+
+	if (state->pid_ctrl_index != -2) {
+		/* postpone the pid filtering cmd */
+		dprintk("pid filter postpone");
+		if (state->pid_ctrl_index < 9) {
+			state->pid_ctrl_index++;
+			state->pid_ctrl[state->pid_ctrl_index].cmd = DIB9000_PID_FILTER;
+			state->pid_ctrl[state->pid_ctrl_index].id = id;
+			state->pid_ctrl[state->pid_ctrl_index].pid = pid;
+			state->pid_ctrl[state->pid_ctrl_index].onoff = onoff;
+		} else
+			dprintk("can not add any more pid ctrl cmd");
+		return 0;
+	}
+
+	DibAcquireLock(&state->demod_lock);
 	dprintk("Index %x, PID %d, OnOff %d", id, pid, onoff);
-	return dib9000_write_word(state, 300 + 1 + id, onoff ? (1 << 13) | pid : 0);
+	ret = dib9000_write_word(state, 300 + 1 + id,
+			onoff ? (1 << 13) | pid : 0);
+	DibReleaseLock(&state->demod_lock);
+	return ret;
 }
 EXPORT_SYMBOL(dib9000_fw_pid_filter);
 
@@ -1778,6 +1828,7 @@ static void dib9000_release(struct dvb_frontend *demod)
 	DibFreeLock(&state->platform.risc.mbx_lock);
 	DibFreeLock(&state->platform.risc.mem_lock);
 	DibFreeLock(&state->platform.risc.mem_mbx_lock);
+	DibFreeLock(&state->demod_lock);
 	dibx000_exit_i2c_master(&st->i2c_master);
 
 	i2c_del_adapter(&st->tuner_adap);
@@ -1795,14 +1846,19 @@ static int dib9000_sleep(struct dvb_frontend *fe)
 {
 	struct dib9000_state *state = fe->demodulator_priv;
 	u8 index_frontend;
-	int ret;
+	int ret = 0;
 
+	DibAcquireLock(&state->demod_lock);
 	for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++) {
 		ret = state->fe[index_frontend]->ops.sleep(state->fe[index_frontend]);
 		if (ret < 0)
-			return ret;
+			goto error;
 	}
-	return dib9000_mbx_send(state, OUT_MSG_FE_SLEEP, NULL, 0);
+	ret = dib9000_mbx_send(state, OUT_MSG_FE_SLEEP, NULL, 0);
+
+error:
+	DibReleaseLock(&state->demod_lock);
+	return ret;
 }
 
 static int dib9000_fe_get_tune_settings(struct dvb_frontend *fe, struct dvb_frontend_tune_settings *tune)
@@ -1816,7 +1872,10 @@ static int dib9000_get_frontend(struct dvb_frontend *fe, struct dvb_frontend_par
 	struct dib9000_state *state = fe->demodulator_priv;
 	u8 index_frontend, sub_index_frontend;
 	fe_status_t stat;
-	int ret;
+	int ret = 0;
+
+	if (state->get_frontend_internal == 0)
+		DibAcquireLock(&state->demod_lock);
 
 	for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++) {
 		state->fe[index_frontend]->ops.read_status(state->fe[index_frontend], &stat);
@@ -1846,14 +1905,15 @@ static int dib9000_get_frontend(struct dvb_frontend *fe, struct dvb_frontend_par
 					    state->fe[index_frontend]->dtv_property_cache.rolloff;
 				}
 			}
-			return 0;
+			ret = 0;
+			goto return_value;
 		}
 	}
 
 	/* get the channel from master chip */
 	ret = dib9000_fw_get_channel(fe, fep);
 	if (ret != 0)
-		return ret;
+		goto return_value;
 
 	/* synchronize the cache with the other frontends */
 	for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++) {
@@ -1866,8 +1926,12 @@ static int dib9000_get_frontend(struct dvb_frontend *fe, struct dvb_frontend_par
 		state->fe[index_frontend]->dtv_property_cache.code_rate_LP = fe->dtv_property_cache.code_rate_LP;
 		state->fe[index_frontend]->dtv_property_cache.rolloff = fe->dtv_property_cache.rolloff;
 	}
+	ret = 0;
 
-	return 0;
+return_value:
+	if (state->get_frontend_internal == 0)
+		DibReleaseLock(&state->demod_lock);
+	return ret;
 }
 
 static int dib9000_set_tune_state(struct dvb_frontend *fe, enum frontend_tune_state tune_state)
@@ -1912,6 +1976,10 @@ static int dib9000_set_frontend(struct dvb_frontend *fe, struct dvb_frontend_par
 		dprintk("dib9000: must specify bandwidth ");
 		return 0;
 	}
+
+	state->pid_ctrl_index = -1; /* postpone the pid filtering cmd */
+	DibAcquireLock(&state->demod_lock);
+
 	fe->dtv_property_cache.delivery_system = SYS_DVBT;
 
 	/* set the master status */
@@ -1974,13 +2042,18 @@ static int dib9000_set_frontend(struct dvb_frontend *fe, struct dvb_frontend_par
 	/* check the tune result */
 	if (exit_condition == 1) {	/* tune failed */
 		dprintk("tune failed");
+		DibReleaseLock(&state->demod_lock);
+		/* tune failed; put all the pid filtering cmd to junk */
+		state->pid_ctrl_index = -1;
 		return 0;
 	}
 
 	dprintk("tune success on frontend%i", index_frontend_success);
 
 	/* synchronize all the channel cache */
+	state->get_frontend_internal = 1;
 	dib9000_get_frontend(state->fe[0], fep);
+	state->get_frontend_internal = 0;
 
 	/* retune the other frontends with the found channel */
 	channel_status.status = CHANNEL_STATUS_PARAMETERS_SET;
@@ -2025,6 +2098,28 @@ static int dib9000_set_frontend(struct dvb_frontend *fe, struct dvb_frontend_par
 	/* turn off the diversity for the last frontend */
 	dib9000_fw_set_diversity_in(state->fe[index_frontend - 1], 0);
 
+	DibReleaseLock(&state->demod_lock);
+	if (state->pid_ctrl_index >= 0) {
+		u8 index_pid_filter_cmd;
+		u8 pid_ctrl_index = state->pid_ctrl_index;
+
+		state->pid_ctrl_index = -2;
+		for (index_pid_filter_cmd = 0;
+				index_pid_filter_cmd <= pid_ctrl_index;
+				index_pid_filter_cmd++) {
+			if (state->pid_ctrl[index_pid_filter_cmd].cmd == DIB9000_PID_FILTER_CTRL)
+				dib9000_fw_pid_filter_ctrl(state->fe[0],
+						state->pid_ctrl[index_pid_filter_cmd].onoff);
+			else if (state->pid_ctrl[index_pid_filter_cmd].cmd == DIB9000_PID_FILTER)
+				dib9000_fw_pid_filter(state->fe[0],
+						state->pid_ctrl[index_pid_filter_cmd].id,
+						state->pid_ctrl[index_pid_filter_cmd].pid,
+						state->pid_ctrl[index_pid_filter_cmd].onoff);
+		}
+	}
+	/* do not postpone any more the pid filtering */
+	state->pid_ctrl_index = -2;
+
 	return 0;
 }
 
@@ -2041,6 +2136,7 @@ static int dib9000_read_status(struct dvb_frontend *fe, fe_status_t * stat)
 	u8 index_frontend;
 	u16 lock = 0, lock_slave = 0;
 
+	DibAcquireLock(&state->demod_lock);
 	for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++)
 		lock_slave |= dib9000_read_lock(state->fe[index_frontend]);
 
@@ -2059,6 +2155,8 @@ static int dib9000_read_status(struct dvb_frontend *fe, fe_status_t * stat)
 	if ((lock & 0x0008) || (lock_slave & 0x0008))
 		*stat |= FE_HAS_LOCK;
 
+	DibReleaseLock(&state->demod_lock);
+
 	return 0;
 }
 
@@ -2066,10 +2164,14 @@ static int dib9000_read_ber(struct dvb_frontend *fe, u32 * ber)
 {
 	struct dib9000_state *state = fe->demodulator_priv;
 	u16 *c;
+	int ret = 0;
 
+	DibAcquireLock(&state->demod_lock);
 	DibAcquireLock(&state->platform.risc.mem_mbx_lock);
-	if (dib9000_fw_memmbx_sync(state, FE_SYNC_CHANNEL) < 0)
-		return -EIO;
+	if (dib9000_fw_memmbx_sync(state, FE_SYNC_CHANNEL) < 0) {
+		ret = -EIO;
+		goto error;
+	}
 	dib9000_risc_mem_read(state, FE_MM_R_FE_MONITOR,
 			state->i2c_read_buffer, 16 * 2);
 	DibReleaseLock(&state->platform.risc.mem_mbx_lock);
@@ -2077,7 +2179,10 @@ static int dib9000_read_ber(struct dvb_frontend *fe, u32 * ber)
 	c = (u16 *)state->i2c_read_buffer;
 
 	*ber = c[10] << 16 | c[11];
-	return 0;
+
+error:
+	DibReleaseLock(&state->demod_lock);
+	return ret;
 }
 
 static int dib9000_read_signal_strength(struct dvb_frontend *fe, u16 * strength)
@@ -2086,7 +2191,9 @@ static int dib9000_read_signal_strength(struct dvb_frontend *fe, u16 * strength)
 	u8 index_frontend;
 	u16 *c = (u16 *)state->i2c_read_buffer;
 	u16 val;
+	int ret = 0;
 
+	DibAcquireLock(&state->demod_lock);
 	*strength = 0;
 	for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++) {
 		state->fe[index_frontend]->ops.read_signal_strength(state->fe[index_frontend], &val);
@@ -2097,8 +2204,10 @@ static int dib9000_read_signal_strength(struct dvb_frontend *fe, u16 * strength)
 	}
 
 	DibAcquireLock(&state->platform.risc.mem_mbx_lock);
-	if (dib9000_fw_memmbx_sync(state, FE_SYNC_CHANNEL) < 0)
-		return -EIO;
+	if (dib9000_fw_memmbx_sync(state, FE_SYNC_CHANNEL) < 0) {
+		ret = -EIO;
+		goto error;
+	}
 	dib9000_risc_mem_read(state, FE_MM_R_FE_MONITOR, (u8 *) c, 16 * 2);
 	DibReleaseLock(&state->platform.risc.mem_mbx_lock);
 
@@ -2107,7 +2216,10 @@ static int dib9000_read_signal_strength(struct dvb_frontend *fe, u16 * strength)
 		*strength = 65535;
 	else
 		*strength += val;
-	return 0;
+
+error:
+	DibReleaseLock(&state->demod_lock);
+	return ret;
 }
 
 static u32 dib9000_get_snr(struct dvb_frontend *fe)
@@ -2151,6 +2263,7 @@ static int dib9000_read_snr(struct dvb_frontend *fe, u16 * snr)
 	u8 index_frontend;
 	u32 snr_master;
 
+	DibAcquireLock(&state->demod_lock);
 	snr_master = dib9000_get_snr(fe);
 	for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++)
 		snr_master += dib9000_get_snr(state->fe[index_frontend]);
@@ -2161,6 +2274,8 @@ static int dib9000_read_snr(struct dvb_frontend *fe, u16 * snr)
 	} else
 		*snr = 0;
 
+	DibReleaseLock(&state->demod_lock);
+
 	return 0;
 }
 
@@ -2168,15 +2283,22 @@ static int dib9000_read_unc_blocks(struct dvb_frontend *fe, u32 * unc)
 {
 	struct dib9000_state *state = fe->demodulator_priv;
 	u16 *c = (u16 *)state->i2c_read_buffer;
+	int ret = 0;
 
+	DibAcquireLock(&state->demod_lock);
 	DibAcquireLock(&state->platform.risc.mem_mbx_lock);
-	if (dib9000_fw_memmbx_sync(state, FE_SYNC_CHANNEL) < 0)
-		return -EIO;
+	if (dib9000_fw_memmbx_sync(state, FE_SYNC_CHANNEL) < 0) {
+		ret = -EIO;
+		goto error;
+	}
 	dib9000_risc_mem_read(state, FE_MM_R_FE_MONITOR, (u8 *) c, 16 * 2);
 	DibReleaseLock(&state->platform.risc.mem_mbx_lock);
 
 	*unc = c[12];
-	return 0;
+
+error:
+	DibReleaseLock(&state->demod_lock);
+	return ret;
 }
 
 int dib9000_i2c_enumeration(struct i2c_adapter *i2c, int no_of_demods, u8 default_addr, u8 first_addr)
@@ -2322,6 +2444,10 @@ struct dvb_frontend *dib9000_attach(struct i2c_adapter *i2c_adap, u8 i2c_addr, c
 	DibInitLock(&st->platform.risc.mbx_lock);
 	DibInitLock(&st->platform.risc.mem_lock);
 	DibInitLock(&st->platform.risc.mem_mbx_lock);
+	DibInitLock(&st->demod_lock);
+	st->get_frontend_internal = 0;
+
+	st->pid_ctrl_index = -2;
 
 	st->fe[0] = fe;
 	fe->demodulator_priv = st;
diff --git a/drivers/media/dvb/frontends/dibx000_common.c b/drivers/media/dvb/frontends/dibx000_common.c
index dc5d17a..774d507 100644
--- a/drivers/media/dvb/frontends/dibx000_common.c
+++ b/drivers/media/dvb/frontends/dibx000_common.c
@@ -1,4 +1,5 @@
 #include <linux/i2c.h>
+#include <linux/mutex.h>
 
 #include "dibx000_common.h"
 
@@ -10,6 +11,13 @@ MODULE_PARM_DESC(debug, "turn on debugging (default: 0)");
 
 static int dibx000_write_word(struct dibx000_i2c_master *mst, u16 reg, u16 val)
 {
+	int ret;
+
+	if (mutex_lock_interruptible(&mst->i2c_buffer_lock) < 0) {
+		dprintk("could not acquire lock");
+		return -EINVAL;
+	}
+
 	mst->i2c_write_buffer[0] = (reg >> 8) & 0xff;
 	mst->i2c_write_buffer[1] = reg & 0xff;
 	mst->i2c_write_buffer[2] = (val >> 8) & 0xff;
@@ -21,11 +29,21 @@ static int dibx000_write_word(struct dibx000_i2c_master *mst, u16 reg, u16 val)
 	mst->msg[0].buf = mst->i2c_write_buffer;
 	mst->msg[0].len = 4;
 
-	return i2c_transfer(mst->i2c_adap, mst->msg, 1) != 1 ? -EREMOTEIO : 0;
+	ret = i2c_transfer(mst->i2c_adap, mst->msg, 1) != 1 ? -EREMOTEIO : 0;
+	mutex_unlock(&mst->i2c_buffer_lock);
+
+	return ret;
 }
 
 static u16 dibx000_read_word(struct dibx000_i2c_master *mst, u16 reg)
 {
+	u16 ret;
+
+	if (mutex_lock_interruptible(&mst->i2c_buffer_lock) < 0) {
+		dprintk("could not acquire lock");
+		return 0;
+	}
+
 	mst->i2c_write_buffer[0] = reg >> 8;
 	mst->i2c_write_buffer[1] = reg & 0xff;
 
@@ -42,7 +60,10 @@ static u16 dibx000_read_word(struct dibx000_i2c_master *mst, u16 reg)
 	if (i2c_transfer(mst->i2c_adap, mst->msg, 2) != 2)
 		dprintk("i2c read error on %d", reg);
 
-	return (mst->i2c_read_buffer[0] << 8) | mst->i2c_read_buffer[1];
+	ret = (mst->i2c_read_buffer[0] << 8) | mst->i2c_read_buffer[1];
+	mutex_unlock(&mst->i2c_buffer_lock);
+
+	return ret;
 }
 
 static int dibx000_is_i2c_done(struct dibx000_i2c_master *mst)
@@ -257,6 +278,7 @@ static int dibx000_i2c_gated_gpio67_xfer(struct i2c_adapter *i2c_adap,
 					struct i2c_msg msg[], int num)
 {
 	struct dibx000_i2c_master *mst = i2c_get_adapdata(i2c_adap);
+	int ret;
 
 	if (num > 32) {
 		dprintk("%s: too much I2C message to be transmitted (%i).\
@@ -264,10 +286,15 @@ static int dibx000_i2c_gated_gpio67_xfer(struct i2c_adapter *i2c_adap,
 		return -ENOMEM;
 	}
 
-	memset(mst->msg, 0, sizeof(struct i2c_msg) * (2 + num));
-
 	dibx000_i2c_select_interface(mst, DIBX000_I2C_INTERFACE_GPIO_6_7);
 
+	if (mutex_lock_interruptible(&mst->i2c_buffer_lock) < 0) {
+		dprintk("could not acquire lock");
+		return -EINVAL;
+	}
+
+	memset(mst->msg, 0, sizeof(struct i2c_msg) * (2 + num));
+
 	/* open the gate */
 	dibx000_i2c_gate_ctrl(mst, &mst->i2c_write_buffer[0], msg[0].addr, 1);
 	mst->msg[0].addr = mst->i2c_addr;
@@ -282,7 +309,11 @@ static int dibx000_i2c_gated_gpio67_xfer(struct i2c_adapter *i2c_adap,
 	mst->msg[num + 1].buf = &mst->i2c_write_buffer[4];
 	mst->msg[num + 1].len = 4;
 
-	return i2c_transfer(mst->i2c_adap, mst->msg, 2 + num) == 2 + num ? num : -EIO;
+	ret = (i2c_transfer(mst->i2c_adap, mst->msg, 2 + num) == 2 + num ?
+			num : -EIO);
+
+	mutex_unlock(&mst->i2c_buffer_lock);
+	return ret;
 }
 
 static struct i2c_algorithm dibx000_i2c_gated_gpio67_algo = {
@@ -294,6 +325,7 @@ static int dibx000_i2c_gated_tuner_xfer(struct i2c_adapter *i2c_adap,
 					struct i2c_msg msg[], int num)
 {
 	struct dibx000_i2c_master *mst = i2c_get_adapdata(i2c_adap);
+	int ret;
 
 	if (num > 32) {
 		dprintk("%s: too much I2C message to be transmitted (%i).\
@@ -301,10 +333,14 @@ static int dibx000_i2c_gated_tuner_xfer(struct i2c_adapter *i2c_adap,
 		return -ENOMEM;
 	}
 
-	memset(mst->msg, 0, sizeof(struct i2c_msg) * (2 + num));
-
 	dibx000_i2c_select_interface(mst, DIBX000_I2C_INTERFACE_TUNER);
 
+	if (mutex_lock_interruptible(&mst->i2c_buffer_lock) < 0) {
+		dprintk("could not acquire lock");
+		return -EINVAL;
+	}
+	memset(mst->msg, 0, sizeof(struct i2c_msg) * (2 + num));
+
 	/* open the gate */
 	dibx000_i2c_gate_ctrl(mst, &mst->i2c_write_buffer[0], msg[0].addr, 1);
 	mst->msg[0].addr = mst->i2c_addr;
@@ -319,7 +355,10 @@ static int dibx000_i2c_gated_tuner_xfer(struct i2c_adapter *i2c_adap,
 	mst->msg[num + 1].buf = &mst->i2c_write_buffer[4];
 	mst->msg[num + 1].len = 4;
 
-	return i2c_transfer(mst->i2c_adap, mst->msg, 2 + num) == 2 + num ? num : -EIO;
+	ret = (i2c_transfer(mst->i2c_adap, mst->msg, 2 + num) == 2 + num ?
+			num : -EIO);
+	mutex_unlock(&mst->i2c_buffer_lock);
+	return ret;
 }
 
 static struct i2c_algorithm dibx000_i2c_gated_tuner_algo = {
@@ -390,8 +429,18 @@ static int i2c_adapter_init(struct i2c_adapter *i2c_adap,
 int dibx000_init_i2c_master(struct dibx000_i2c_master *mst, u16 device_rev,
 				struct i2c_adapter *i2c_adap, u8 i2c_addr)
 {
-	u8 tx[4];
-	struct i2c_msg m = {.addr = i2c_addr >> 1,.buf = tx,.len = 4 };
+	int ret;
+
+	mutex_init(&mst->i2c_buffer_lock);
+	if (mutex_lock_interruptible(&mst->i2c_buffer_lock) < 0) {
+		dprintk("could not acquire lock");
+		return -EINVAL;
+	}
+	memset(mst->msg, 0, sizeof(struct i2c_msg));
+	mst->msg[0].addr = i2c_addr >> 1;
+	mst->msg[0].flags = 0;
+	mst->msg[0].buf = mst->i2c_write_buffer;
+	mst->msg[0].len = 4;
 
 	mst->device_rev = device_rev;
 	mst->i2c_adap = i2c_adap;
@@ -431,9 +480,12 @@ int dibx000_init_i2c_master(struct dibx000_i2c_master *mst, u16 device_rev,
 				"DiBX000: could not initialize the master i2c_adapter\n");
 
 	/* initialize the i2c-master by closing the gate */
-	dibx000_i2c_gate_ctrl(mst, tx, 0, 0);
+	dibx000_i2c_gate_ctrl(mst, mst->i2c_write_buffer, 0, 0);
+
+	ret = (i2c_transfer(i2c_adap, mst->msg, 1) == 1);
+	mutex_unlock(&mst->i2c_buffer_lock);
 
-	return i2c_transfer(i2c_adap, &m, 1) == 1;
+	return ret;
 }
 
 EXPORT_SYMBOL(dibx000_init_i2c_master);
diff --git a/drivers/media/dvb/frontends/dibx000_common.h b/drivers/media/dvb/frontends/dibx000_common.h
index f031165..5e01147 100644
--- a/drivers/media/dvb/frontends/dibx000_common.h
+++ b/drivers/media/dvb/frontends/dibx000_common.h
@@ -33,6 +33,7 @@ struct dibx000_i2c_master {
 	struct i2c_msg msg[34];
 	u8 i2c_write_buffer[8];
 	u8 i2c_read_buffer[2];
+	struct mutex i2c_buffer_lock;
 };
 
 extern int dibx000_init_i2c_master(struct dibx000_i2c_master *mst,
diff --git a/drivers/media/dvb/frontends/lgdt330x.c b/drivers/media/dvb/frontends/lgdt330x.c
index 43971e6..aa63d68 100644
--- a/drivers/media/dvb/frontends/lgdt330x.c
+++ b/drivers/media/dvb/frontends/lgdt330x.c
@@ -104,8 +104,8 @@ static int i2c_write_demod_bytes (struct lgdt330x_state* state,
  * then reads the data returned for (len) bytes.
  */
 
-static u8 i2c_read_demod_bytes (struct lgdt330x_state* state,
-			       enum I2C_REG reg, u8* buf, int len)
+static int i2c_read_demod_bytes(struct lgdt330x_state *state,
+				enum I2C_REG reg, u8 *buf, int len)
 {
 	u8 wr [] = { reg };
 	struct i2c_msg msg [] = {
@@ -118,6 +118,8 @@ static u8 i2c_read_demod_bytes (struct lgdt330x_state* state,
 	ret = i2c_transfer(state->i2c, msg, 2);
 	if (ret != 2) {
 		printk(KERN_WARNING "lgdt330x: %s: addr 0x%02x select 0x%02x error (ret == %i)\n", __func__, state->config->demod_address, reg, ret);
+		if (ret >= 0)
+			ret = -EIO;
 	} else {
 		ret = 0;
 	}
diff --git a/drivers/media/rc/winbond-cir.c b/drivers/media/rc/winbond-cir.c
index 5d06b89..6f03846 100644
--- a/drivers/media/rc/winbond-cir.c
+++ b/drivers/media/rc/winbond-cir.c
@@ -1058,6 +1058,7 @@ wbcir_probe(struct pnp_dev *device, const struct pnp_device_id *dev_id)
 		goto exit_unregister_led;
 	}
 
+	data->dev->driver_type = RC_DRIVER_IR_RAW;
 	data->dev->driver_name = WBCIR_NAME;
 	data->dev->input_name = WBCIR_NAME;
 	data->dev->input_phys = "wbcir/cir0";
diff --git a/drivers/media/video/cx23885/cx23885-dvb.c b/drivers/media/video/cx23885/cx23885-dvb.c
index 3c315f9..2b5cd21 100644
--- a/drivers/media/video/cx23885/cx23885-dvb.c
+++ b/drivers/media/video/cx23885/cx23885-dvb.c
@@ -843,7 +843,7 @@ static int dvb_register(struct cx23885_tsport *port)
 			static struct xc2028_ctrl ctl = {
 				.fname   = XC3028L_DEFAULT_FIRMWARE,
 				.max_len = 64,
-				.demod   = 5000,
+				.demod   = XC3028_FE_DIBCOM52,
 				/* This is true for all demods with
 					v36 firmware? */
 				.type    = XC2028_D2633,
diff --git a/drivers/media/video/hdpvr/hdpvr-video.c b/drivers/media/video/hdpvr/hdpvr-video.c
index 514aea7..4c0394a 100644
--- a/drivers/media/video/hdpvr/hdpvr-video.c
+++ b/drivers/media/video/hdpvr/hdpvr-video.c
@@ -284,12 +284,13 @@ static int hdpvr_start_streaming(struct hdpvr_device *dev)
 
 		hdpvr_config_call(dev, CTRL_START_STREAMING_VALUE, 0x00);
 
+		dev->status = STATUS_STREAMING;
+
 		INIT_WORK(&dev->worker, hdpvr_transmit_buffers);
 		queue_work(dev->workqueue, &dev->worker);
 
 		v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev,
 			 "streaming started\n");
-		dev->status = STATUS_STREAMING;
 
 		return 0;
 	}
diff --git a/drivers/media/video/pvrusb2/pvrusb2-devattr.c b/drivers/media/video/pvrusb2/pvrusb2-devattr.c
index e799331..c4eca15 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-devattr.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-devattr.c
@@ -319,7 +319,17 @@ static struct tda829x_config tda829x_no_probe = {
 	.probe_tuner = TDA829X_DONT_PROBE,
 };
 
+static struct tda18271_std_map hauppauge_tda18271_dvbt_std_map = {
+        .dvbt_6   = { .if_freq = 3300, .agc_mode = 3, .std = 4,
+                      .if_lvl = 1, .rfagc_top = 0x37, },
+        .dvbt_7   = { .if_freq = 3800, .agc_mode = 3, .std = 5,
+                      .if_lvl = 1, .rfagc_top = 0x37, },
+        .dvbt_8   = { .if_freq = 4300, .agc_mode = 3, .std = 6,
+                      .if_lvl = 1, .rfagc_top = 0x37, },
+};
+
 static struct tda18271_config hauppauge_tda18271_dvb_config = {
+	.std_map = &hauppauge_tda18271_dvbt_std_map,
 	.gate    = TDA18271_GATE_ANALOG,
 	.output_opt = TDA18271_OUTPUT_LT_OFF,
 };
diff --git a/drivers/media/video/s5p-fimc/fimc-core.c b/drivers/media/video/s5p-fimc/fimc-core.c
index bdf19ad..e9babcb 100644
--- a/drivers/media/video/s5p-fimc/fimc-core.c
+++ b/drivers/media/video/s5p-fimc/fimc-core.c
@@ -36,7 +36,7 @@ static char *fimc_clocks[MAX_FIMC_CLOCKS] = {
 static struct fimc_fmt fimc_formats[] = {
 	{
 		.name		= "RGB565",
-		.fourcc		= V4L2_PIX_FMT_RGB565X,
+		.fourcc		= V4L2_PIX_FMT_RGB565,
 		.depth		= { 16 },
 		.color		= S5P_FIMC_RGB565,
 		.memplanes	= 1,
diff --git a/drivers/media/video/saa7164/saa7164-cards.c b/drivers/media/video/saa7164/saa7164-cards.c
index 69822a4..c713691 100644
--- a/drivers/media/video/saa7164/saa7164-cards.c
+++ b/drivers/media/video/saa7164/saa7164-cards.c
@@ -203,6 +203,66 @@ struct saa7164_board saa7164_boards[] = {
 			.i2c_reg_len	= REGLEN_8bit,
 		} },
 	},
+	[SAA7164_BOARD_HAUPPAUGE_HVR2200_4] = {
+		.name		= "Hauppauge WinTV-HVR2200",
+		.porta		= SAA7164_MPEG_DVB,
+		.portb		= SAA7164_MPEG_DVB,
+		.portc		= SAA7164_MPEG_ENCODER,
+		.portd		= SAA7164_MPEG_ENCODER,
+		.porte		= SAA7164_MPEG_VBI,
+		.portf		= SAA7164_MPEG_VBI,
+		.chiprev	= SAA7164_CHIP_REV3,
+		.unit		= {{
+			.id		= 0x1d,
+			.type		= SAA7164_UNIT_EEPROM,
+			.name		= "4K EEPROM",
+			.i2c_bus_nr	= SAA7164_I2C_BUS_0,
+			.i2c_bus_addr	= 0xa0 >> 1,
+			.i2c_reg_len	= REGLEN_8bit,
+		}, {
+			.id		= 0x04,
+			.type		= SAA7164_UNIT_TUNER,
+			.name		= "TDA18271-1",
+			.i2c_bus_nr	= SAA7164_I2C_BUS_1,
+			.i2c_bus_addr	= 0xc0 >> 1,
+			.i2c_reg_len	= REGLEN_8bit,
+		}, {
+			.id		= 0x05,
+			.type		= SAA7164_UNIT_ANALOG_DEMODULATOR,
+			.name		= "TDA8290-1",
+			.i2c_bus_nr	= SAA7164_I2C_BUS_1,
+			.i2c_bus_addr	= 0x84 >> 1,
+			.i2c_reg_len	= REGLEN_8bit,
+		}, {
+			.id		= 0x1b,
+			.type		= SAA7164_UNIT_TUNER,
+			.name		= "TDA18271-2",
+			.i2c_bus_nr	= SAA7164_I2C_BUS_2,
+			.i2c_bus_addr	= 0xc0 >> 1,
+			.i2c_reg_len	= REGLEN_8bit,
+		}, {
+			.id		= 0x1c,
+			.type		= SAA7164_UNIT_ANALOG_DEMODULATOR,
+			.name		= "TDA8290-2",
+			.i2c_bus_nr	= SAA7164_I2C_BUS_2,
+			.i2c_bus_addr	= 0x84 >> 1,
+			.i2c_reg_len	= REGLEN_8bit,
+		}, {
+			.id		= 0x1e,
+			.type		= SAA7164_UNIT_DIGITAL_DEMODULATOR,
+			.name		= "TDA10048-1",
+			.i2c_bus_nr	= SAA7164_I2C_BUS_1,
+			.i2c_bus_addr	= 0x10 >> 1,
+			.i2c_reg_len	= REGLEN_8bit,
+		}, {
+			.id		= 0x1f,
+			.type		= SAA7164_UNIT_DIGITAL_DEMODULATOR,
+			.name		= "TDA10048-2",
+			.i2c_bus_nr	= SAA7164_I2C_BUS_2,
+			.i2c_bus_addr	= 0x12 >> 1,
+			.i2c_reg_len	= REGLEN_8bit,
+		} },
+	},
 	[SAA7164_BOARD_HAUPPAUGE_HVR2250] = {
 		.name		= "Hauppauge WinTV-HVR2250",
 		.porta		= SAA7164_MPEG_DVB,
@@ -426,6 +486,10 @@ struct saa7164_subid saa7164_subids[] = {
 		.subvendor = 0x0070,
 		.subdevice = 0x8851,
 		.card      = SAA7164_BOARD_HAUPPAUGE_HVR2250_2,
+	}, {
+		.subvendor = 0x0070,
+		.subdevice = 0x8940,
+		.card      = SAA7164_BOARD_HAUPPAUGE_HVR2200_4,
 	},
 };
 const unsigned int saa7164_idcount = ARRAY_SIZE(saa7164_subids);
@@ -469,6 +533,7 @@ void saa7164_gpio_setup(struct saa7164_dev *dev)
 	case SAA7164_BOARD_HAUPPAUGE_HVR2200:
 	case SAA7164_BOARD_HAUPPAUGE_HVR2200_2:
 	case SAA7164_BOARD_HAUPPAUGE_HVR2200_3:
+	case SAA7164_BOARD_HAUPPAUGE_HVR2200_4:
 	case SAA7164_BOARD_HAUPPAUGE_HVR2250:
 	case SAA7164_BOARD_HAUPPAUGE_HVR2250_2:
 	case SAA7164_BOARD_HAUPPAUGE_HVR2250_3:
@@ -549,6 +614,7 @@ void saa7164_card_setup(struct saa7164_dev *dev)
 	case SAA7164_BOARD_HAUPPAUGE_HVR2200:
 	case SAA7164_BOARD_HAUPPAUGE_HVR2200_2:
 	case SAA7164_BOARD_HAUPPAUGE_HVR2200_3:
+	case SAA7164_BOARD_HAUPPAUGE_HVR2200_4:
 	case SAA7164_BOARD_HAUPPAUGE_HVR2250:
 	case SAA7164_BOARD_HAUPPAUGE_HVR2250_2:
 	case SAA7164_BOARD_HAUPPAUGE_HVR2250_3:
diff --git a/drivers/media/video/saa7164/saa7164-dvb.c b/drivers/media/video/saa7164/saa7164-dvb.c
index f65eab6..d377937 100644
--- a/drivers/media/video/saa7164/saa7164-dvb.c
+++ b/drivers/media/video/saa7164/saa7164-dvb.c
@@ -475,6 +475,7 @@ int saa7164_dvb_register(struct saa7164_port *port)
 	case SAA7164_BOARD_HAUPPAUGE_HVR2200:
 	case SAA7164_BOARD_HAUPPAUGE_HVR2200_2:
 	case SAA7164_BOARD_HAUPPAUGE_HVR2200_3:
+	case SAA7164_BOARD_HAUPPAUGE_HVR2200_4:
 		i2c_bus = &dev->i2c_bus[port->nr + 1];
 		switch (port->nr) {
 		case 0:
diff --git a/drivers/media/video/saa7164/saa7164.h b/drivers/media/video/saa7164/saa7164.h
index 16745d2..13bd27e 100644
--- a/drivers/media/video/saa7164/saa7164.h
+++ b/drivers/media/video/saa7164/saa7164.h
@@ -83,6 +83,7 @@
 #define SAA7164_BOARD_HAUPPAUGE_HVR2200_3	6
 #define SAA7164_BOARD_HAUPPAUGE_HVR2250_2	7
 #define SAA7164_BOARD_HAUPPAUGE_HVR2250_3	8
+#define SAA7164_BOARD_HAUPPAUGE_HVR2200_4	9
 
 #define SAA7164_MAX_UNITS		8
 #define SAA7164_TS_NUMBER_OF_LINES	312
diff --git a/drivers/media/video/samsung/fimc/fimc.h b/drivers/media/video/samsung/fimc/fimc.h
index 7ad4495..e261382 100644
--- a/drivers/media/video/samsung/fimc/fimc.h
+++ b/drivers/media/video/samsung/fimc/fimc.h
@@ -597,6 +597,7 @@ extern int fimc_hwset_enable_irq(struct fimc_control *ctrl,
 extern int fimc_hwset_disable_irq(struct fimc_control *ctrl);
 extern int fimc_hwset_clear_irq(struct fimc_control *ctrl);
 extern int fimc_hwset_reset(struct fimc_control *ctrl);
+extern int fimc_hwset_sw_reset(struct fimc_control *ctrl);
 extern int fimc_hwset_clksrc(struct fimc_control *ctrl, int src_clk);
 extern int fimc_hwget_overflow_state(struct fimc_control *ctrl);
 extern int fimc_hwset_camera_offset(struct fimc_control *ctrl);
diff --git a/drivers/media/video/samsung/fimc/fimc_capture.c b/drivers/media/video/samsung/fimc/fimc_capture.c
index 570ed70..6b4fd85 100644
--- a/drivers/media/video/samsung/fimc/fimc_capture.c
+++ b/drivers/media/video/samsung/fimc/fimc_capture.c
@@ -707,6 +707,12 @@ int fimc_enum_fmt_vid_capture(struct file *file, void *fh,
 
 	fimc_dbg("%s\n", __func__);
 
+	if (ctrl->out) {
+		fimc_err("%s: fimc is already used for output mode\n",
+			 __func__);
+		return -EINVAL;
+	}
+
 	if (!ctrl->cam || !ctrl->cam->sd) {
 		fimc_err("%s: No capture device.\n", __func__);
 		return -ENODEV;
diff --git a/drivers/media/video/samsung/fimc/fimc_dev.c b/drivers/media/video/samsung/fimc/fimc_dev.c
index 2554d7e..aadae21 100644
--- a/drivers/media/video/samsung/fimc/fimc_dev.c
+++ b/drivers/media/video/samsung/fimc/fimc_dev.c
@@ -364,11 +364,19 @@ static inline void fimc_irq_out(struct fimc_control *ctrl)
 	struct fimc_ctx *ctx;
 	u32 wakeup = 1;
 	int ctx_num = ctrl->out->idxs.active.ctx;
-	ctx = &ctrl->out->ctx[ctx_num];
 
 	/* Interrupt pendding clear */
 	fimc_hwset_clear_irq(ctrl);
 
+	/* check context num */
+	if (ctx_num < 0 || ctx_num >= FIMC_MAX_CTXS) {
+		fimc_err("fimc_irq_out: invalid ctx (ctx=%d)\n", ctx_num);
+		wake_up(&ctrl->wq);
+		return;
+	}
+
+	ctx = &ctrl->out->ctx[ctx_num];
+
 	switch (ctx->overlay.mode) {
 	case FIMC_OVLY_NONE_SINGLE_BUF:
 		wakeup = fimc_irq_out_single_buf(ctrl, ctx);
@@ -381,6 +389,8 @@ static inline void fimc_irq_out(struct fimc_control *ctrl)
 		wakeup = fimc_irq_out_dma(ctrl, ctx);
 		break;
 	default:
+		fimc_err("[ctx=%d] fimc_irq_out: wrong overlay.mode (%d)\n",
+				ctx_num, ctx->overlay.mode);
 		break;
 	}
 
@@ -1509,13 +1519,12 @@ int fimc_suspend(struct platform_device *pdev, pm_message_t state)
 
 	if (ctrl->out)
 		fimc_suspend_out(ctrl);
-
 	else if (ctrl->cap)
 		fimc_suspend_cap(ctrl);
 	else
 		ctrl->status = FIMC_OFF_SLEEP;
 
-	if (atomic_read(&ctrl->in_use))
+	if (atomic_read(&ctrl->in_use) && ctrl->status != FIMC_OFF_SLEEP)
 		fimc_clk_en(ctrl, false);
 
 	return 0;
@@ -1630,12 +1639,11 @@ int fimc_resume(struct platform_device *pdev)
 	ctrl = get_fimc_ctrl(id);
 	pdata = to_fimc_plat(ctrl->dev);
 
-	if (atomic_read(&ctrl->in_use))
+	if (atomic_read(&ctrl->in_use) && ctrl->status != FIMC_OFF_SLEEP)
 		fimc_clk_en(ctrl, true);
 
 	if (ctrl->out)
 		fimc_resume_out(ctrl);
-
 	else if (ctrl->cap)
 		fimc_resume_cap(ctrl);
 	else
diff --git a/drivers/media/video/samsung/fimc/fimc_output.c b/drivers/media/video/samsung/fimc/fimc_output.c
index 98ff74e..ebae1ad 100644
--- a/drivers/media/video/samsung/fimc/fimc_output.c
+++ b/drivers/media/video/samsung/fimc/fimc_output.c
@@ -79,6 +79,7 @@ static int fimc_outdev_stop_camif(void *param)
 	fimc_hwset_disable_autoload(ctrl);
 	fimc_hwset_stop_scaler(ctrl);
 	fimc_hwset_disable_capture(ctrl);
+	fimc_hwset_sw_reset(ctrl);
 
 	fimc_clk_en(ctrl, false);
 	return 0;
@@ -1851,18 +1852,18 @@ static int fimc_qbuf_output_single_buf(struct fimc_control *ctrl,
 		return -EINVAL;
 	}
 
-	ret = fimc_outdev_start_camif(ctrl);
-	if (ret < 0) {
-		fimc_err("Fail: fimc_start_camif\n");
-		return -EINVAL;
-	}
-
 	ctrl->out->idxs.active.idx = idx;
 	ctrl->out->idxs.active.ctx = ctx->ctx_num;
 
 	ctrl->status = FIMC_STREAMON;
 	ctx->status = FIMC_STREAMON;
 
+	ret = fimc_outdev_start_camif(ctrl);
+	if (ret < 0) {
+		fimc_err("Fail: fimc_start_camif\n");
+		return -EINVAL;
+	}
+
 	return 0;
 }
 
@@ -2112,6 +2113,7 @@ int fimc_dqbuf_output(void *fh, struct v4l2_buffer *b)
 		if (ret == 0) {
 			fimc_dump_context(ctrl, ctx);
 			fimc_err("[0] out_queue is empty\n");
+			ctx->status = FIMC_STREAMON_IDLE;
 			return -EAGAIN;
 		} else if (ret == -ERESTARTSYS) {
 			fimc_print_signal(ctrl);
@@ -2158,6 +2160,12 @@ int fimc_g_fmt_vid_out(struct file *filp, void *fh, struct v4l2_format *f)
 
 	fimc_info1("%s: called\n", __func__);
 
+	if (ctrl->cap) {
+		fimc_err("%s: fimc is already used for capture mode\n",
+			 __func__);
+		return -EINVAL;
+	}
+
 	if (!out) {
 		out = kzalloc(sizeof(*out), GFP_KERNEL);
 		if (!out) {
diff --git a/drivers/media/video/samsung/fimc/fimc_regs.c b/drivers/media/video/samsung/fimc/fimc_regs.c
index b360f1a..227945a 100644
--- a/drivers/media/video/samsung/fimc/fimc_regs.c
+++ b/drivers/media/video/samsung/fimc/fimc_regs.c
@@ -294,6 +294,22 @@ int fimc_hwset_reset(struct fimc_control *ctrl)
 	return 0;
 }
 
+int fimc_hwset_sw_reset(struct fimc_control *ctrl)
+{
+	u32 cfg = 0;
+
+	/* s/w reset */
+	cfg = readl(ctrl->regs + S3C_CIGCTRL);
+	cfg |= (S3C_CIGCTRL_SWRST);
+	writel(cfg, ctrl->regs + S3C_CIGCTRL);
+
+	cfg = readl(ctrl->regs + S3C_CIGCTRL);
+	cfg &= ~S3C_CIGCTRL_SWRST;
+	writel(cfg, ctrl->regs + S3C_CIGCTRL);
+
+	return 0;
+}
+
 int fimc_hwset_clksrc(struct fimc_control *ctrl, int src_clk)
 {
 	u32 cfg = readl(ctrl->regs + S3C_MISC_FIMC);
diff --git a/drivers/media/video/uvc/uvc_driver.c b/drivers/media/video/uvc/uvc_driver.c
index b6eae48..1f962dc 100644
--- a/drivers/media/video/uvc/uvc_driver.c
+++ b/drivers/media/video/uvc/uvc_driver.c
@@ -1960,7 +1960,7 @@ static int __uvc_resume(struct usb_interface *intf, int reset)
 
 	list_for_each_entry(stream, &dev->streams, list) {
 		if (stream->intf == intf)
-			return uvc_video_resume(stream);
+			return uvc_video_resume(stream, reset);
 	}
 
 	uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface "
diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c
index 543a803..dbefdb0 100644
--- a/drivers/media/video/uvc/uvc_v4l2.c
+++ b/drivers/media/video/uvc/uvc_v4l2.c
@@ -65,6 +65,15 @@ static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain,
 			goto done;
 		}
 
+		/* Prevent excessive memory consumption, as well as integer
+		 * overflows.
+		 */
+		if (xmap->menu_count == 0 ||
+		    xmap->menu_count > UVC_MAX_CONTROL_MENU_ENTRIES) {
+			ret = -EINVAL;
+			goto done;
+		}
+
 		size = xmap->menu_count * sizeof(*map->menu_info);
 		map->menu_info = kmalloc(size, GFP_KERNEL);
 		if (map->menu_info == NULL) {
diff --git a/drivers/media/video/uvc/uvc_video.c b/drivers/media/video/uvc/uvc_video.c
index 4999479..6f147de 100644
--- a/drivers/media/video/uvc/uvc_video.c
+++ b/drivers/media/video/uvc/uvc_video.c
@@ -1104,10 +1104,18 @@ int uvc_video_suspend(struct uvc_streaming *stream)
  * buffers, making sure userspace applications are notified of the problem
  * instead of waiting forever.
  */
-int uvc_video_resume(struct uvc_streaming *stream)
+int uvc_video_resume(struct uvc_streaming *stream, int reset)
 {
 	int ret;
 
+	/* If the bus has been reset on resume, set the alternate setting to 0.
+	 * This should be the default value, but some devices crash or otherwise
+	 * misbehave if they don't receive a SET_INTERFACE request before any
+	 * other video control request.
+	 */
+	if (reset)
+		usb_set_interface(stream->dev->udev, stream->intfnum, 0);
+
 	stream->frozen = 0;
 
 	ret = uvc_commit_video(stream, &stream->ctrl);
diff --git a/drivers/media/video/uvc/uvcvideo.h b/drivers/media/video/uvc/uvcvideo.h
index 20107fd..cf2401a 100644
--- a/drivers/media/video/uvc/uvcvideo.h
+++ b/drivers/media/video/uvc/uvcvideo.h
@@ -200,6 +200,7 @@ struct uvc_xu_control {
 
 /* Maximum allowed number of control mappings per device */
 #define UVC_MAX_CONTROL_MAPPINGS	1024
+#define UVC_MAX_CONTROL_MENU_ENTRIES	32
 
 /* Devices quirks */
 #define UVC_QUIRK_STATUS_INTERVAL	0x00000001
@@ -639,7 +640,7 @@ extern void uvc_mc_cleanup_entity(struct uvc_entity *entity);
 /* Video */
 extern int uvc_video_init(struct uvc_streaming *stream);
 extern int uvc_video_suspend(struct uvc_streaming *stream);
-extern int uvc_video_resume(struct uvc_streaming *stream);
+extern int uvc_video_resume(struct uvc_streaming *stream, int reset);
 extern int uvc_video_enable(struct uvc_streaming *stream, int enable);
 extern int uvc_probe_video(struct uvc_streaming *stream,
 		struct uvc_streaming_control *probe);
diff --git a/drivers/media/video/v4l2-ioctl.c b/drivers/media/video/v4l2-ioctl.c
index 69e8c6f..bda252f 100644
--- a/drivers/media/video/v4l2-ioctl.c
+++ b/drivers/media/video/v4l2-ioctl.c
@@ -2289,6 +2289,10 @@ static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
 		struct v4l2_ext_controls *ctrls = parg;
 
 		if (ctrls->count != 0) {
+			if (ctrls->count > V4L2_CID_MAX_CTRLS) {
+				ret = -EINVAL;
+				break;
+			}
 			*user_ptr = (void __user *)ctrls->controls;
 			*kernel_ptr = (void **)&ctrls->controls;
 			*array_size = sizeof(struct v4l2_ext_control)