Merge remote-tracking branch 'kernelorg/linux-3.0.y' into 3_0_64

Conflicts:
	arch/arm/Kconfig
	arch/arm/include/asm/hwcap.h
	arch/arm/kernel/smp.c
	arch/arm/plat-samsung/adc.c
	drivers/gpu/drm/i915/i915_reg.h
	drivers/gpu/drm/i915/intel_drv.h
	drivers/mmc/core/sd.c
	drivers/net/tun.c
	drivers/net/usb/usbnet.c
	drivers/regulator/max8997.c
	drivers/usb/core/hub.c
	drivers/usb/host/xhci.h
	drivers/usb/serial/qcserial.c
	fs/jbd2/transaction.c
	include/linux/migrate.h
	kernel/sys.c
	kernel/time/timekeeping.c
	lib/genalloc.c
	mm/memory-failure.c
	mm/memory_hotplug.c
	mm/mempolicy.c
	mm/page_alloc.c
	mm/vmalloc.c
	mm/vmscan.c
	mm/vmstat.c
	scripts/Kbuild.include

Change-Id: I91e2d85c07320c7ccfc04cf98a448e89bed6ade6

7 files changed, 99 insertions, 53 deletions

diff --git a/drivers/usb/core/devices.c b/drivers/usb/core/devices.c
index 0149c09..ca98341 100644
--- a/drivers/usb/core/devices.c
+++ b/drivers/usb/core/devices.c
@@ -624,7 +624,7 @@ static ssize_t usb_device_read(struct file *file, char __user *buf,
 	/* print devices for all busses */
 	list_for_each_entry(bus, &usb_bus_list, bus_list) {
 		/* recurse through all children of the root hub */
-		if (!bus->root_hub)
+		if (!bus_to_hcd(bus)->rh_registered)
 			continue;
 		usb_lock_device(bus->root_hub);
 		ret = usb_device_dump(&buf, &nbytes, &skip_bytes, ppos,
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index 9823f18..e800fbc 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -292,17 +292,14 @@ static struct async *async_getcompleted(struct dev_state *ps)
 static struct async *async_getpending(struct dev_state *ps,
 					     void __user *userurb)
 {
-	unsigned long flags;
 	struct async *as;
 
-	spin_lock_irqsave(&ps->lock, flags);
 	list_for_each_entry(as, &ps->async_pending, asynclist)
 		if (as->userurb == userurb) {
 			list_del_init(&as->asynclist);
-			spin_unlock_irqrestore(&ps->lock, flags);
 			return as;
 		}
-	spin_unlock_irqrestore(&ps->lock, flags);
+
 	return NULL;
 }
 
@@ -357,6 +354,7 @@ static void cancel_bulk_urbs(struct dev_state *ps, unsigned bulk_addr)
 __releases(ps->lock)
 __acquires(ps->lock)
 {
+	struct urb *urb;
 	struct async *as;
 
 	/* Mark all the pending URBs that match bulk_addr, up to but not
@@ -379,8 +377,11 @@ __acquires(ps->lock)
 	list_for_each_entry(as, &ps->async_pending, asynclist) {
 		if (as->bulk_status == AS_UNLINK) {
 			as->bulk_status = 0;		/* Only once */
+			urb = as->urb;
+			usb_get_urb(urb);
 			spin_unlock(&ps->lock);		/* Allow completions */
-			usb_unlink_urb(as->urb);
+			usb_unlink_urb(urb);
+			usb_put_urb(urb);
 			spin_lock(&ps->lock);
 			goto rescan;
 		}
@@ -433,6 +434,7 @@ static void async_completed(struct urb *urb)
 
 static void destroy_async(struct dev_state *ps, struct list_head *list)
 {
+	struct urb *urb;
 	struct async *as;
 	unsigned long flags;
 
@@ -440,10 +442,13 @@ static void destroy_async(struct dev_state *ps, struct list_head *list)
 	while (!list_empty(list)) {
 		as = list_entry(list->next, struct async, asynclist);
 		list_del_init(&as->asynclist);
+		urb = as->urb;
+		usb_get_urb(urb);
 
 		/* drop the spinlock so the completion handler can run */
 		spin_unlock_irqrestore(&ps->lock, flags);
-		usb_kill_urb(as->urb);
+		usb_kill_urb(urb);
+		usb_put_urb(urb);
 		spin_lock_irqsave(&ps->lock, flags);
 	}
 	spin_unlock_irqrestore(&ps->lock, flags);
@@ -1360,12 +1365,24 @@ static int proc_submiturb(struct dev_state *ps, void __user *arg)
 
 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
 {
+	struct urb *urb;
 	struct async *as;
+	unsigned long flags;
 
+	spin_lock_irqsave(&ps->lock, flags);
 	as = async_getpending(ps, arg);
-	if (!as)
+	if (!as) {
+		spin_unlock_irqrestore(&ps->lock, flags);
 		return -EINVAL;
-	usb_kill_urb(as->urb);
+	}
+
+	urb = as->urb;
+	usb_get_urb(urb);
+	spin_unlock_irqrestore(&ps->lock, flags);
+
+	usb_kill_urb(urb);
+	usb_put_urb(urb);
+
 	return 0;
 }
 
@@ -1548,10 +1565,14 @@ static int processcompl_compat(struct async *as, void __user * __user *arg)
 	void __user *addr = as->userurb;
 	unsigned int i;
 
-	if (as->userbuffer && urb->actual_length)
-		if (copy_to_user(as->userbuffer, urb->transfer_buffer,
-				 urb->actual_length))
+	if (as->userbuffer && urb->actual_length) {
+		if (urb->number_of_packets > 0)		/* Isochronous */
+			i = urb->transfer_buffer_length;
+		else					/* Non-Isoc */
+			i = urb->actual_length;
+		if (copy_to_user(as->userbuffer, urb->transfer_buffer, i))
 			return -EFAULT;
+	}
 	if (put_user(as->status, &userurb->status))
 		return -EFAULT;
 	if (put_user(urb->actual_length, &userurb->actual_length))
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index aa7bbbc..6c1642b 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -495,15 +495,6 @@ static int hcd_pci_suspend_noirq(struct device *dev)
 
 	pci_save_state(pci_dev);
 
-	/*
-	 * Some systems crash if an EHCI controller is in D3 during
-	 * a sleep transition.  We have to leave such controllers in D0.
-	 */
-	if (hcd->broken_pci_sleep) {
-		dev_dbg(dev, "Staying in PCI D0\n");
-		return retval;
-	}
-
 	/* If the root hub is dead rather than suspended, disallow remote
 	 * wakeup.  usb_hc_died() should ensure that both hosts are marked as
 	 * dying, so we only need to check the primary roothub.
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 45e0908..9d5af9b 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -977,10 +977,7 @@ static int register_root_hub(struct usb_hcd *hcd)
 	if (retval) {
 		dev_err (parent_dev, "can't register root hub for %s, %d\n",
 				dev_name(&usb_dev->dev), retval);
-	}
-	mutex_unlock(&usb_bus_list_lock);
-
-	if (retval == 0) {
+	} else {
 		spin_lock_irq (&hcd_root_hub_lock);
 		hcd->rh_registered = 1;
 		spin_unlock_irq (&hcd_root_hub_lock);
@@ -989,6 +986,7 @@ static int register_root_hub(struct usb_hcd *hcd)
 		if (HCD_DEAD(hcd))
 			usb_hc_died (hcd);	/* This time clean up */
 	}
+	mutex_unlock(&usb_bus_list_lock);
 
 	return retval;
 }
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 93aa0e7..7f7b58f 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -24,6 +24,7 @@
 #include <linux/kthread.h>
 #include <linux/mutex.h>
 #include <linux/freezer.h>
+#include <linux/random.h>
 
 #include <asm/uaccess.h>
 #include <asm/byteorder.h>
@@ -484,13 +485,16 @@ static void hub_tt_work(struct work_struct *work)
 	int			limit = 100;
 
 	spin_lock_irqsave (&hub->tt.lock, flags);
-	while (--limit && !list_empty (&hub->tt.clear_list)) {
+	while (!list_empty(&hub->tt.clear_list)) {
 		struct list_head	*next;
 		struct usb_tt_clear	*clear;
 		struct usb_device	*hdev = hub->hdev;
 		const struct hc_driver	*drv;
 		int			status;
 
+		if (!hub->quiescing && --limit < 0)
+			break;
+
 		next = hub->tt.clear_list.next;
 		clear = list_entry (next, struct usb_tt_clear, clear_list);
 		list_del (&clear->clear_list);
@@ -968,7 +972,7 @@ static void hub_quiesce(struct usb_hub *hub, enum hub_quiescing_type type)
 	if (hub->has_indicators)
 		cancel_delayed_work_sync(&hub->leds);
 	if (hub->tt.hub)
-		cancel_work_sync(&hub->tt.clear_work);
+		flush_work_sync(&hub->tt.clear_work);
 }
 
 /* caller has locked the hub device */
@@ -1928,6 +1932,15 @@ int usb_new_device(struct usb_device *udev)
 #endif
 	call_battery_notify(udev, 1);
 #endif
+
+	if (udev->serial)
+		add_device_randomness(udev->serial, strlen(udev->serial));
+	if (udev->product)
+		add_device_randomness(udev->product, strlen(udev->product));
+	if (udev->manufacturer)
+		add_device_randomness(udev->manufacturer,
+				      strlen(udev->manufacturer));
+
 	device_enable_async_suspend(&udev->dev);
 	/* Register the device.  The device driver is responsible
 	 * for configuring the device and invoking the add-device
@@ -2064,7 +2077,7 @@ static unsigned hub_is_wusb(struct usb_hub *hub)
 #define HUB_ROOT_RESET_TIME	50	/* times are in msec */
 #define HUB_SHORT_RESET_TIME	10
 #define HUB_LONG_RESET_TIME	200
-#define HUB_RESET_TIMEOUT	500
+#define HUB_RESET_TIMEOUT	800
 
 static int hub_port_wait_reset(struct usb_hub *hub, int port1,
 				struct usb_device *udev, unsigned int delay)
@@ -2438,7 +2451,7 @@ int usb_port_suspend(struct usb_device *udev, pm_message_t msg)
 static int finish_port_resume(struct usb_device *udev)
 {
 	int	status = 0;
-	u16	devstatus;
+	u16	devstatus = 0;
 
 	/* caller owns the udev device lock */
 	dev_dbg(&udev->dev, "%s\n",
@@ -2487,7 +2500,13 @@ static int finish_port_resume(struct usb_device *udev)
 	if (status) {
 		dev_dbg(&udev->dev, "gone after usb resume? status %d\n",
 				status);
-	} else if (udev->actconfig) {
+	/*
+	 * There are a few quirky devices which violate the standard
+	 * by claiming to have remote wakeup enabled after a reset,
+	 * which crash if the feature is cleared, hence check for
+	 * udev->reset_resume
+	 */
+	} else if (udev->actconfig && !udev->reset_resume) {
 		le16_to_cpus(&devstatus);
 		if (devstatus & (1 << USB_DEVICE_REMOTE_WAKEUP)) {
 			status = usb_control_msg(udev,
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index a7ef9dd..b468962 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -1787,28 +1787,8 @@ free_interfaces:
 		goto free_interfaces;
 	}
 
-	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
-			      USB_REQ_SET_CONFIGURATION, 0, configuration, 0,
-			      NULL, 0, USB_CTRL_SET_TIMEOUT);
-	if (ret < 0) {
-		/* All the old state is gone, so what else can we do?
-		 * The device is probably useless now anyway.
-		 */
-		cp = NULL;
-	}
-
-	dev->actconfig = cp;
-	if (!cp) {
-		usb_set_device_state(dev, USB_STATE_ADDRESS);
-		usb_hcd_alloc_bandwidth(dev, NULL, NULL, NULL);
-		mutex_unlock(hcd->bandwidth_mutex);
-		usb_autosuspend_device(dev);
-		goto free_interfaces;
-	}
-	mutex_unlock(hcd->bandwidth_mutex);
-	usb_set_device_state(dev, USB_STATE_CONFIGURED);
-
-	/* Initialize the new interface structures and the
+	/*
+	 * Initialize the new interface structures and the
 	 * hc/hcd/usbcore interface/endpoint state.
 	 */
 	for (i = 0; i < nintf; ++i) {
@@ -1820,7 +1800,6 @@ free_interfaces:
 		intfc = cp->intf_cache[i];
 		intf->altsetting = intfc->altsetting;
 		intf->num_altsetting = intfc->num_altsetting;
-		intf->intf_assoc = find_iad(dev, cp, i);
 		kref_get(&intfc->ref);
 
 		alt = usb_altnum_to_altsetting(intf, 0);
@@ -1833,6 +1812,8 @@ free_interfaces:
 		if (!alt)
 			alt = &intf->altsetting[0];
 
+		intf->intf_assoc =
+			find_iad(dev, cp, alt->desc.bInterfaceNumber);
 		intf->cur_altsetting = alt;
 		usb_enable_interface(dev, intf, true);
 		intf->dev.parent = &dev->dev;
@@ -1851,6 +1832,35 @@ free_interfaces:
 	}
 	kfree(new_interfaces);
 
+	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+			      USB_REQ_SET_CONFIGURATION, 0, configuration, 0,
+			      NULL, 0, USB_CTRL_SET_TIMEOUT);
+	if (ret < 0 && cp) {
+		/*
+		 * All the old state is gone, so what else can we do?
+		 * The device is probably useless now anyway.
+		 */
+		usb_hcd_alloc_bandwidth(dev, NULL, NULL, NULL);
+		for (i = 0; i < nintf; ++i) {
+			usb_disable_interface(dev, cp->interface[i], true);
+			put_device(&cp->interface[i]->dev);
+			cp->interface[i] = NULL;
+		}
+		cp = NULL;
+	}
+
+	dev->actconfig = cp;
+	mutex_unlock(hcd->bandwidth_mutex);
+
+	if (!cp) {
+		usb_set_device_state(dev, USB_STATE_ADDRESS);
+
+		/* Leave LPM disabled while the device is unconfigured. */
+		usb_autosuspend_device(dev);
+		return ret;
+	}
+	usb_set_device_state(dev, USB_STATE_CONFIGURED);
+
 	if (cp->string == NULL &&
 			!(dev->quirks & USB_QUIRK_CONFIG_INTF_STRINGS))
 		cp->string = usb_cache_string(dev, cp->desc.iConfiguration);
diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index f826b52..df6cfa4 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -96,6 +96,10 @@ static const struct usb_device_id usb_quirk_list[] = {
 	{ USB_DEVICE(0x04b4, 0x0526), .driver_info =
 			USB_QUIRK_CONFIG_INTF_STRINGS },
 
+	/* Microchip Joss Optical infrared touchboard device */
+	{ USB_DEVICE(0x04d8, 0x000c), .driver_info =
+			USB_QUIRK_CONFIG_INTF_STRINGS },
+
 	/* Samsung Android phone modem - ID conflict with SPH-I500 */
 	{ USB_DEVICE(0x04e8, 0x6601), .driver_info =
 			USB_QUIRK_CONFIG_INTF_STRINGS },
@@ -123,6 +127,9 @@ static const struct usb_device_id usb_quirk_list[] = {
 	/* Guillemot Webcam Hercules Dualpix Exchange*/
 	{ USB_DEVICE(0x06f8, 0x3005), .driver_info = USB_QUIRK_RESET_RESUME },
 
+	/* Midiman M-Audio Keystation 88es */
+	{ USB_DEVICE(0x0763, 0x0192), .driver_info = USB_QUIRK_RESET_RESUME },
+
 	/* M-Systems Flash Disk Pioneers */
 	{ USB_DEVICE(0x08ec, 0x1000), .driver_info = USB_QUIRK_RESET_RESUME },