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path: root/drivers/usb/core/driver.c
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Diffstat (limited to 'drivers/usb/core/driver.c')
-rw-r--r--drivers/usb/core/driver.c65
1 files changed, 33 insertions, 32 deletions
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index b1046324441..113e484c763 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -24,6 +24,7 @@
#include <linux/device.h>
#include <linux/usb.h>
+#include <linux/workqueue.h>
#include "hcd.h"
#include "usb.h"
@@ -302,11 +303,11 @@ int usb_driver_claim_interface(struct usb_driver *driver,
dev->driver = &driver->drvwrap.driver;
usb_set_intfdata(iface, priv);
- mutex_lock_nested(&udev->pm_mutex, udev->level);
+ usb_pm_lock(udev);
iface->condition = USB_INTERFACE_BOUND;
mark_active(iface);
iface->pm_usage_cnt = !(driver->supports_autosuspend);
- mutex_unlock(&udev->pm_mutex);
+ usb_pm_unlock(udev);
/* if interface was already added, bind now; else let
* the future device_add() bind it, bypassing probe()
@@ -355,11 +356,11 @@ void usb_driver_release_interface(struct usb_driver *driver,
dev->driver = NULL;
usb_set_intfdata(iface, NULL);
- mutex_lock_nested(&udev->pm_mutex, udev->level);
+ usb_pm_lock(udev);
iface->condition = USB_INTERFACE_UNBOUND;
mark_quiesced(iface);
iface->needs_remote_wakeup = 0;
- mutex_unlock(&udev->pm_mutex);
+ usb_pm_unlock(udev);
}
EXPORT_SYMBOL(usb_driver_release_interface);
@@ -788,7 +789,7 @@ EXPORT_SYMBOL_GPL_FUTURE(usb_deregister);
#ifdef CONFIG_PM
-/* Caller has locked udev->pm_mutex */
+/* Caller has locked udev's pm_mutex */
static int suspend_device(struct usb_device *udev, pm_message_t msg)
{
struct usb_device_driver *udriver;
@@ -815,7 +816,7 @@ done:
return status;
}
-/* Caller has locked udev->pm_mutex */
+/* Caller has locked udev's pm_mutex */
static int resume_device(struct usb_device *udev)
{
struct usb_device_driver *udriver;
@@ -841,7 +842,7 @@ done:
return status;
}
-/* Caller has locked intf's usb_device's pm_mutex */
+/* Caller has locked intf's usb_device's pm mutex */
static int suspend_interface(struct usb_interface *intf, pm_message_t msg)
{
struct usb_driver *driver;
@@ -1063,7 +1064,7 @@ int usb_resume_both(struct usb_device *udev)
/* Propagate the resume up the tree, if necessary */
if (udev->state == USB_STATE_SUSPENDED) {
if (parent) {
- mutex_lock_nested(&parent->pm_mutex, parent->level);
+ usb_pm_lock(parent);
parent->auto_pm = 1;
status = usb_resume_both(parent);
} else {
@@ -1078,7 +1079,7 @@ int usb_resume_both(struct usb_device *udev)
if (status == 0)
status = resume_device(udev);
if (parent)
- mutex_unlock(&parent->pm_mutex);
+ usb_pm_unlock(parent);
} else {
/* Needed only for setting udev->dev.power.power_state.event
@@ -1103,8 +1104,8 @@ int usb_resume_both(struct usb_device *udev)
/**
* usb_autosuspend_device - delayed autosuspend of a USB device and its interfaces
- * @udev - the usb_device to autosuspend
- * @dec_usage_cnt - flag to decrement @udev's PM-usage counter
+ * @udev: the usb_device to autosuspend
+ * @dec_usage_cnt: flag to decrement @udev's PM-usage counter
*
* This routine should be called when a core subsystem is finished using
* @udev and wants to allow it to autosuspend. Examples would be when
@@ -1128,20 +1129,20 @@ int usb_resume_both(struct usb_device *udev)
*/
void usb_autosuspend_device(struct usb_device *udev, int dec_usage_cnt)
{
- mutex_lock_nested(&udev->pm_mutex, udev->level);
+ usb_pm_lock(udev);
udev->pm_usage_cnt -= dec_usage_cnt;
if (udev->pm_usage_cnt <= 0)
- schedule_delayed_work(&udev->autosuspend,
+ queue_delayed_work(ksuspend_usb_wq, &udev->autosuspend,
USB_AUTOSUSPEND_DELAY);
- mutex_unlock(&udev->pm_mutex);
+ usb_pm_unlock(udev);
// dev_dbg(&udev->dev, "%s: cnt %d\n",
// __FUNCTION__, udev->pm_usage_cnt);
}
/**
* usb_autoresume_device - immediately autoresume a USB device and its interfaces
- * @udev - the usb_device to autoresume
- * @inc_usage_cnt - flag to increment @udev's PM-usage counter
+ * @udev: the usb_device to autoresume
+ * @inc_usage_cnt: flag to increment @udev's PM-usage counter
*
* This routine should be called when a core subsystem wants to use @udev
* and needs to guarantee that it is not suspended. In addition, the
@@ -1167,13 +1168,13 @@ int usb_autoresume_device(struct usb_device *udev, int inc_usage_cnt)
{
int status;
- mutex_lock_nested(&udev->pm_mutex, udev->level);
+ usb_pm_lock(udev);
udev->pm_usage_cnt += inc_usage_cnt;
udev->auto_pm = 1;
status = usb_resume_both(udev);
if (status != 0)
udev->pm_usage_cnt -= inc_usage_cnt;
- mutex_unlock(&udev->pm_mutex);
+ usb_pm_unlock(udev);
// dev_dbg(&udev->dev, "%s: status %d cnt %d\n",
// __FUNCTION__, status, udev->pm_usage_cnt);
return status;
@@ -1181,7 +1182,7 @@ int usb_autoresume_device(struct usb_device *udev, int inc_usage_cnt)
/**
* usb_autopm_put_interface - decrement a USB interface's PM-usage counter
- * @intf - the usb_interface whose counter should be decremented
+ * @intf: the usb_interface whose counter should be decremented
*
* This routine should be called by an interface driver when it is
* finished using @intf and wants to allow it to autosuspend. A typical
@@ -1214,13 +1215,13 @@ void usb_autopm_put_interface(struct usb_interface *intf)
{
struct usb_device *udev = interface_to_usbdev(intf);
- mutex_lock_nested(&udev->pm_mutex, udev->level);
- if (intf->condition != USB_INTERFACE_UNBOUND) {
- if (--intf->pm_usage_cnt <= 0)
- schedule_delayed_work(&udev->autosuspend,
- USB_AUTOSUSPEND_DELAY);
+ usb_pm_lock(udev);
+ if (intf->condition != USB_INTERFACE_UNBOUND &&
+ --intf->pm_usage_cnt <= 0) {
+ queue_delayed_work(ksuspend_usb_wq, &udev->autosuspend,
+ USB_AUTOSUSPEND_DELAY);
}
- mutex_unlock(&udev->pm_mutex);
+ usb_pm_unlock(udev);
// dev_dbg(&intf->dev, "%s: cnt %d\n",
// __FUNCTION__, intf->pm_usage_cnt);
}
@@ -1228,7 +1229,7 @@ EXPORT_SYMBOL_GPL(usb_autopm_put_interface);
/**
* usb_autopm_get_interface - increment a USB interface's PM-usage counter
- * @intf - the usb_interface whose counter should be incremented
+ * @intf: the usb_interface whose counter should be incremented
*
* This routine should be called by an interface driver when it wants to
* use @intf and needs to guarantee that it is not suspended. In addition,
@@ -1262,7 +1263,7 @@ int usb_autopm_get_interface(struct usb_interface *intf)
struct usb_device *udev = interface_to_usbdev(intf);
int status;
- mutex_lock_nested(&udev->pm_mutex, udev->level);
+ usb_pm_lock(udev);
if (intf->condition == USB_INTERFACE_UNBOUND)
status = -ENODEV;
else {
@@ -1272,7 +1273,7 @@ int usb_autopm_get_interface(struct usb_interface *intf)
if (status != 0)
--intf->pm_usage_cnt;
}
- mutex_unlock(&udev->pm_mutex);
+ usb_pm_unlock(udev);
// dev_dbg(&intf->dev, "%s: status %d cnt %d\n",
// __FUNCTION__, status, intf->pm_usage_cnt);
return status;
@@ -1288,10 +1289,10 @@ static int usb_suspend(struct device *dev, pm_message_t message)
if (is_usb_device(dev)) {
struct usb_device *udev = to_usb_device(dev);
- mutex_lock_nested(&udev->pm_mutex, udev->level);
+ usb_pm_lock(udev);
udev->auto_pm = 0;
status = usb_suspend_both(udev, message);
- mutex_unlock(&udev->pm_mutex);
+ usb_pm_unlock(udev);
} else
status = 0;
return status;
@@ -1304,10 +1305,10 @@ static int usb_resume(struct device *dev)
if (is_usb_device(dev)) {
struct usb_device *udev = to_usb_device(dev);
- mutex_lock_nested(&udev->pm_mutex, udev->level);
+ usb_pm_lock(udev);
udev->auto_pm = 0;
status = usb_resume_both(udev);
- mutex_unlock(&udev->pm_mutex);
+ usb_pm_unlock(udev);
/* Rebind drivers that had no suspend method? */
} else
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-02 14:14:29 +0000