Merge branch 'usb-next' into musb-merge

* usb-next: (132 commits)
  USB: uas: Use GFP_NOIO instead of GFP_KERNEL in I/O submission path
  USB: uas: Ensure we only bind to a UAS interface
  USB: uas: Rename sense pipe and sense urb to status pipe and status urb
  USB: uas: Use kzalloc instead of kmalloc
  USB: uas: Fix up the Sense IU
  usb: musb: core: kill unneeded #include's
  DA8xx: assign name to MUSB IRQ resource
  usb: gadget: g_ncm added
  usb: gadget: f_ncm.c added
  usb: gadget: u_ether: prepare for NCM
  usb: pch_udc: Fix setup transfers with data out
  usb: pch_udc: Fix compile error, warnings and checkpatch warnings
  usb: add ab8500 usb transceiver driver
  USB: gadget: Implement runtime PM for MSM bus glue driver
  USB: gadget: Implement runtime PM for ci13xxx gadget
  USB: gadget: Add USB controller driver for MSM SoC
  USB: gadget: Introduce ci13xxx_udc_driver struct
  USB: gadget: Initialize ci13xxx gadget device's coherent DMA mask
  USB: gadget: Fix "scheduling while atomic" bugs in ci13xxx_udc
  USB: gadget: Separate out PCI bus code from ci13xxx_udc
  ...

9 files changed, 61 insertions, 207 deletions

diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index c0e60fb..b9278a1 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -27,7 +27,6 @@
 #include <linux/usb.h>
 #include <linux/usb/quirks.h>
 #include <linux/usb/hcd.h>
-#include <linux/pm_runtime.h>
 
 #include "usb.h"
 
@@ -1262,6 +1261,7 @@ static int usb_resume_both(struct usb_device *udev, pm_message_t msg)
 					udev->reset_resume);
 		}
 	}
+	usb_mark_last_busy(udev);
 
  done:
 	dev_vdbg(&udev->dev, "%s: status %d\n", __func__, status);
@@ -1329,7 +1329,6 @@ int usb_resume(struct device *dev, pm_message_t msg)
 			pm_runtime_disable(dev);
 			pm_runtime_set_active(dev);
 			pm_runtime_enable(dev);
-			udev->last_busy = jiffies;
 			do_unbind_rebind(udev, DO_REBIND);
 		}
 	}
@@ -1397,33 +1396,8 @@ void usb_autosuspend_device(struct usb_device *udev)
 {
 	int	status;
 
-	udev->last_busy = jiffies;
-	status = pm_runtime_put_sync(&udev->dev);
-	dev_vdbg(&udev->dev, "%s: cnt %d -> %d\n",
-			__func__, atomic_read(&udev->dev.power.usage_count),
-			status);
-}
-
-/**
- * usb_try_autosuspend_device - attempt an autosuspend of a USB device and its interfaces
- * @udev: the usb_device to autosuspend
- *
- * This routine should be called when a core subsystem thinks @udev may
- * be ready to autosuspend.
- *
- * @udev's usage counter left unchanged.  If it is 0 and all the interfaces
- * are inactive then an autosuspend will be attempted.  The attempt may
- * fail or be delayed.
- *
- * The caller must hold @udev's device lock.
- *
- * This routine can run only in process context.
- */
-void usb_try_autosuspend_device(struct usb_device *udev)
-{
-	int	status;
-
-	status = pm_runtime_idle(&udev->dev);
+	usb_mark_last_busy(udev);
+	status = pm_runtime_put_sync_autosuspend(&udev->dev);
 	dev_vdbg(&udev->dev, "%s: cnt %d -> %d\n",
 			__func__, atomic_read(&udev->dev.power.usage_count),
 			status);
@@ -1482,7 +1456,7 @@ void usb_autopm_put_interface(struct usb_interface *intf)
 	struct usb_device	*udev = interface_to_usbdev(intf);
 	int			status;
 
-	udev->last_busy = jiffies;
+	usb_mark_last_busy(udev);
 	atomic_dec(&intf->pm_usage_cnt);
 	status = pm_runtime_put_sync(&intf->dev);
 	dev_vdbg(&intf->dev, "%s: cnt %d -> %d\n",
@@ -1509,32 +1483,11 @@ EXPORT_SYMBOL_GPL(usb_autopm_put_interface);
 void usb_autopm_put_interface_async(struct usb_interface *intf)
 {
 	struct usb_device	*udev = interface_to_usbdev(intf);
-	unsigned long		last_busy;
-	int			status = 0;
+	int			status;
 
-	last_busy = udev->last_busy;
-	udev->last_busy = jiffies;
+	usb_mark_last_busy(udev);
 	atomic_dec(&intf->pm_usage_cnt);
-	pm_runtime_put_noidle(&intf->dev);
-
-	if (udev->dev.power.runtime_auto) {
-		/* Optimization: Don't schedule a delayed autosuspend if
-		 * the timer is already running and the expiration time
-		 * wouldn't change.
-		 *
-		 * We have to use the interface's timer.  Attempts to
-		 * schedule a suspend for the device would fail because
-		 * the interface is still active.
-		 */
-		if (intf->dev.power.timer_expires == 0 ||
-				round_jiffies_up(last_busy) !=
-				round_jiffies_up(jiffies)) {
-			status = pm_schedule_suspend(&intf->dev,
-					jiffies_to_msecs(
-					round_jiffies_up_relative(
-						udev->autosuspend_delay)));
-		}
-	}
+	status = pm_runtime_put(&intf->dev);
 	dev_vdbg(&intf->dev, "%s: cnt %d -> %d\n",
 			__func__, atomic_read(&intf->dev.power.usage_count),
 			status);
@@ -1554,7 +1507,7 @@ void usb_autopm_put_interface_no_suspend(struct usb_interface *intf)
 {
 	struct usb_device	*udev = interface_to_usbdev(intf);
 
-	udev->last_busy = jiffies;
+	usb_mark_last_busy(udev);
 	atomic_dec(&intf->pm_usage_cnt);
 	pm_runtime_put_noidle(&intf->dev);
 }
@@ -1612,18 +1565,9 @@ EXPORT_SYMBOL_GPL(usb_autopm_get_interface);
  */
 int usb_autopm_get_interface_async(struct usb_interface *intf)
 {
-	int		status = 0;
-	enum rpm_status	s;
-
-	/* Don't request a resume unless the interface is already suspending
-	 * or suspended.  Doing so would force a running suspend timer to be
-	 * cancelled.
-	 */
-	pm_runtime_get_noresume(&intf->dev);
-	s = ACCESS_ONCE(intf->dev.power.runtime_status);
-	if (s == RPM_SUSPENDING || s == RPM_SUSPENDED)
-		status = pm_request_resume(&intf->dev);
+	int	status;
 
+	status = pm_runtime_get(&intf->dev);
 	if (status < 0 && status != -EINPROGRESS)
 		pm_runtime_put_noidle(&intf->dev);
 	else
@@ -1650,7 +1594,7 @@ void usb_autopm_get_interface_no_resume(struct usb_interface *intf)
 {
 	struct usb_device	*udev = interface_to_usbdev(intf);
 
-	udev->last_busy = jiffies;
+	usb_mark_last_busy(udev);
 	atomic_inc(&intf->pm_usage_cnt);
 	pm_runtime_get_noresume(&intf->dev);
 }
@@ -1661,7 +1605,6 @@ static int autosuspend_check(struct usb_device *udev)
 {
 	int			w, i;
 	struct usb_interface	*intf;
-	unsigned long		suspend_time, j;
 
 	/* Fail if autosuspend is disabled, or any interfaces are in use, or
 	 * any interface drivers require remote wakeup but it isn't available.
@@ -1701,87 +1644,46 @@ static int autosuspend_check(struct usb_device *udev)
 		return -EOPNOTSUPP;
 	}
 	udev->do_remote_wakeup = w;
-
-	/* If everything is okay but the device hasn't been idle for long
-	 * enough, queue a delayed autosuspend request.
-	 */
-	j = ACCESS_ONCE(jiffies);
-	suspend_time = udev->last_busy + udev->autosuspend_delay;
-	if (time_before(j, suspend_time)) {
-		pm_schedule_suspend(&udev->dev, jiffies_to_msecs(
-				round_jiffies_up_relative(suspend_time - j)));
-		return -EAGAIN;
-	}
 	return 0;
 }
 
 static int usb_runtime_suspend(struct device *dev)
 {
-	int	status = 0;
+	struct usb_device	*udev = to_usb_device(dev);
+	int			status;
 
 	/* A USB device can be suspended if it passes the various autosuspend
 	 * checks.  Runtime suspend for a USB device means suspending all the
 	 * interfaces and then the device itself.
 	 */
-	if (is_usb_device(dev)) {
-		struct usb_device	*udev = to_usb_device(dev);
-
-		if (autosuspend_check(udev) != 0)
-			return -EAGAIN;
-
-		status = usb_suspend_both(udev, PMSG_AUTO_SUSPEND);
-
-		/* If an interface fails the suspend, adjust the last_busy
-		 * time so that we don't get another suspend attempt right
-		 * away.
-		 */
-		if (status) {
-			udev->last_busy = jiffies +
-					(udev->autosuspend_delay == 0 ?
-						HZ/2 : 0);
-		}
-
-		/* Prevent the parent from suspending immediately after */
-		else if (udev->parent)
-			udev->parent->last_busy = jiffies;
-	}
+	if (autosuspend_check(udev) != 0)
+		return -EAGAIN;
 
-	/* Runtime suspend for a USB interface doesn't mean anything. */
+	status = usb_suspend_both(udev, PMSG_AUTO_SUSPEND);
 	return status;
 }
 
 static int usb_runtime_resume(struct device *dev)
 {
+	struct usb_device	*udev = to_usb_device(dev);
+	int			status;
+
 	/* Runtime resume for a USB device means resuming both the device
 	 * and all its interfaces.
 	 */
-	if (is_usb_device(dev)) {
-		struct usb_device	*udev = to_usb_device(dev);
-		int			status;
-
-		status = usb_resume_both(udev, PMSG_AUTO_RESUME);
-		udev->last_busy = jiffies;
-		return status;
-	}
-
-	/* Runtime resume for a USB interface doesn't mean anything. */
-	return 0;
+	status = usb_resume_both(udev, PMSG_AUTO_RESUME);
+	return status;
 }
 
 static int usb_runtime_idle(struct device *dev)
 {
+	struct usb_device	*udev = to_usb_device(dev);
+
 	/* An idle USB device can be suspended if it passes the various
-	 * autosuspend checks.  An idle interface can be suspended at
-	 * any time.
+	 * autosuspend checks.
 	 */
-	if (is_usb_device(dev)) {
-		struct usb_device	*udev = to_usb_device(dev);
-
-		if (autosuspend_check(udev) != 0)
-			return 0;
-	}
-
-	pm_runtime_suspend(dev);
+	if (autosuspend_check(udev) == 0)
+		pm_runtime_autosuspend(dev);
 	return 0;
 }
 
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index 3799573..b55d460 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -19,7 +19,6 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/pci.h>
-#include <linux/pm_runtime.h>
 #include <linux/usb.h>
 #include <linux/usb/hcd.h>
 
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index ced846a..6a95017 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -38,7 +38,6 @@
 #include <asm/unaligned.h>
 #include <linux/platform_device.h>
 #include <linux/workqueue.h>
-#include <linux/pm_runtime.h>
 
 #include <linux/usb.h>
 #include <linux/usb/hcd.h>
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 27115b4..b98efae 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -24,7 +24,6 @@
 #include <linux/kthread.h>
 #include <linux/mutex.h>
 #include <linux/freezer.h>
-#include <linux/pm_runtime.h>
 
 #include <asm/uaccess.h>
 #include <asm/byteorder.h>
@@ -1804,8 +1803,15 @@ int usb_new_device(struct usb_device *udev)
 
 	/* Tell the runtime-PM framework the device is active */
 	pm_runtime_set_active(&udev->dev);
+	pm_runtime_get_noresume(&udev->dev);
+	pm_runtime_use_autosuspend(&udev->dev);
 	pm_runtime_enable(&udev->dev);
 
+	/* By default, forbid autosuspend for all devices.  It will be
+	 * allowed for hubs during binding.
+	 */
+	usb_disable_autosuspend(udev);
+
 	err = usb_enumerate_device(udev);	/* Read descriptors */
 	if (err < 0)
 		goto fail;
@@ -1831,6 +1837,8 @@ int usb_new_device(struct usb_device *udev)
 	}
 
 	(void) usb_create_ep_devs(&udev->dev, &udev->ep0, udev);
+	usb_mark_last_busy(udev);
+	pm_runtime_put_sync_autosuspend(&udev->dev);
 	return err;
 
 fail:
@@ -2221,6 +2229,7 @@ int usb_port_suspend(struct usb_device *udev, pm_message_t msg)
 		usb_set_device_state(udev, USB_STATE_SUSPENDED);
 		msleep(10);
 	}
+	usb_mark_last_busy(hub->hdev);
 	return status;
 }
 
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index d6e3e41..8324874 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -1804,6 +1804,7 @@ free_interfaces:
 		INIT_WORK(&intf->reset_ws, __usb_queue_reset_device);
 		intf->minor = -1;
 		device_initialize(&intf->dev);
+		pm_runtime_no_callbacks(&intf->dev);
 		dev_set_name(&intf->dev, "%d-%s:%d.%d",
 			dev->bus->busnum, dev->devpath,
 			configuration, alt->desc.bInterfaceNumber);
diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index 25719da..44c5954 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -117,21 +117,6 @@ void usb_detect_quirks(struct usb_device *udev)
 		dev_dbg(&udev->dev, "USB quirks for this device: %x\n",
 				udev->quirks);
 
-#ifdef	CONFIG_USB_SUSPEND
-
-	/* By default, disable autosuspend for all devices.  The hub driver
-	 * will enable it for hubs.
-	 */
-	usb_disable_autosuspend(udev);
-
-	/* Autosuspend can also be disabled if the initial autosuspend_delay
-	 * is negative.
-	 */
-	if (udev->autosuspend_delay < 0)
-		usb_autoresume_device(udev);
-
-#endif
-
 	/* For the present, all devices default to USB-PERSIST enabled */
 #if 0		/* was: #ifdef CONFIG_PM */
 	/* Hubs are automatically enabled for USB-PERSIST */
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index 448f5b4..6781c36 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -233,8 +233,6 @@ static DEVICE_ATTR(urbnum, S_IRUGO, show_urbnum, NULL);
 
 #ifdef	CONFIG_PM
 
-static const char power_group[] = "power";
-
 static ssize_t
 show_persist(struct device *dev, struct device_attribute *attr, char *buf)
 {
@@ -278,7 +276,7 @@ static int add_persist_attributes(struct device *dev)
 		if (udev->descriptor.bDeviceClass != USB_CLASS_HUB)
 			rc = sysfs_add_file_to_group(&dev->kobj,
 					&dev_attr_persist.attr,
-					power_group);
+					power_group_name);
 	}
 	return rc;
 }
@@ -287,7 +285,7 @@ static void remove_persist_attributes(struct device *dev)
 {
 	sysfs_remove_file_from_group(&dev->kobj,
 			&dev_attr_persist.attr,
-			power_group);
+			power_group_name);
 }
 #else
 
@@ -336,44 +334,20 @@ static DEVICE_ATTR(active_duration, S_IRUGO, show_active_duration, NULL);
 static ssize_t
 show_autosuspend(struct device *dev, struct device_attribute *attr, char *buf)
 {
-	struct usb_device *udev = to_usb_device(dev);
-
-	return sprintf(buf, "%d\n", udev->autosuspend_delay / HZ);
+	return sprintf(buf, "%d\n", dev->power.autosuspend_delay / 1000);
 }
 
 static ssize_t
 set_autosuspend(struct device *dev, struct device_attribute *attr,
 		const char *buf, size_t count)
 {
-	struct usb_device *udev = to_usb_device(dev);
-	int value, old_delay;
-	int rc;
+	int value;
 
-	if (sscanf(buf, "%d", &value) != 1 || value >= INT_MAX/HZ ||
-			value <= - INT_MAX/HZ)
+	if (sscanf(buf, "%d", &value) != 1 || value >= INT_MAX/1000 ||
+			value <= -INT_MAX/1000)
 		return -EINVAL;
-	value *= HZ;
-
-	usb_lock_device(udev);
-	old_delay = udev->autosuspend_delay;
-	udev->autosuspend_delay = value;
-
-	if (old_delay < 0) {	/* Autosuspend wasn't allowed */
-		if (value >= 0)
-			usb_autosuspend_device(udev);
-	} else {		/* Autosuspend was allowed */
-		if (value < 0) {
-			rc = usb_autoresume_device(udev);
-			if (rc < 0) {
-				count = rc;
-				udev->autosuspend_delay = old_delay;
-			}
-		} else {
-			usb_try_autosuspend_device(udev);
-		}
-	}
 
-	usb_unlock_device(udev);
+	pm_runtime_set_autosuspend_delay(dev, value * 1000);
 	return count;
 }
 
@@ -438,44 +412,30 @@ set_level(struct device *dev, struct device_attribute *attr,
 
 static DEVICE_ATTR(level, S_IRUGO | S_IWUSR, show_level, set_level);
 
+static struct attribute *power_attrs[] = {
+	&dev_attr_autosuspend.attr,
+	&dev_attr_level.attr,
+	&dev_attr_connected_duration.attr,
+	&dev_attr_active_duration.attr,
+	NULL,
+};
+static struct attribute_group power_attr_group = {
+	.name	= power_group_name,
+	.attrs	= power_attrs,
+};
+
 static int add_power_attributes(struct device *dev)
 {
 	int rc = 0;
 
-	if (is_usb_device(dev)) {
-		rc = sysfs_add_file_to_group(&dev->kobj,
-				&dev_attr_autosuspend.attr,
-				power_group);
-		if (rc == 0)
-			rc = sysfs_add_file_to_group(&dev->kobj,
-					&dev_attr_level.attr,
-					power_group);
-		if (rc == 0)
-			rc = sysfs_add_file_to_group(&dev->kobj,
-					&dev_attr_connected_duration.attr,
-					power_group);
-		if (rc == 0)
-			rc = sysfs_add_file_to_group(&dev->kobj,
-					&dev_attr_active_duration.attr,
-					power_group);
-	}
+	if (is_usb_device(dev))
+		rc = sysfs_merge_group(&dev->kobj, &power_attr_group);
 	return rc;
 }
 
 static void remove_power_attributes(struct device *dev)
 {
-	sysfs_remove_file_from_group(&dev->kobj,
-			&dev_attr_active_duration.attr,
-			power_group);
-	sysfs_remove_file_from_group(&dev->kobj,
-			&dev_attr_connected_duration.attr,
-			power_group);
-	sysfs_remove_file_from_group(&dev->kobj,
-			&dev_attr_level.attr,
-			power_group);
-	sysfs_remove_file_from_group(&dev->kobj,
-			&dev_attr_autosuspend.attr,
-			power_group);
+	sysfs_unmerge_group(&dev->kobj, &power_attr_group);
 }
 
 #else
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index fdd4130..079cb57 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -445,7 +445,8 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent,
 	INIT_LIST_HEAD(&dev->filelist);
 
 #ifdef	CONFIG_PM
-	dev->autosuspend_delay = usb_autosuspend_delay * HZ;
+	pm_runtime_set_autosuspend_delay(&dev->dev,
+			usb_autosuspend_delay * 1000);
 	dev->connect_time = jiffies;
 	dev->active_duration = -jiffies;
 #endif
diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h
index cd88220..b975450 100644
--- a/drivers/usb/core/usb.h
+++ b/drivers/usb/core/usb.h
@@ -75,14 +75,12 @@ static inline int usb_port_resume(struct usb_device *udev, pm_message_t msg)
 #ifdef CONFIG_USB_SUSPEND
 
 extern void usb_autosuspend_device(struct usb_device *udev);
-extern void usb_try_autosuspend_device(struct usb_device *udev);
 extern int usb_autoresume_device(struct usb_device *udev);
 extern int usb_remote_wakeup(struct usb_device *dev);
 
 #else
 
 #define usb_autosuspend_device(udev)		do {} while (0)
-#define usb_try_autosuspend_device(udev)	do {} while (0)
 static inline int usb_autoresume_device(struct usb_device *udev)
 {
 	return 0;