USB: use PM core routines to enable/disable autosuspend

This patch (as1366) replaces the private routines
usb_enable_autosuspend() and usb_disable_autosuspend() with calls to
the standard pm_runtime_allow() and pm_runtime_forbid() functions in
the runtime PM framework.  They do the same thing.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index 271e857..2071467 100644 (file)
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -1356,13 +1356,9 @@ int usb_resume(struct device *dev, pm_message_t msg)
  *
  * The caller must hold @udev's device lock.
  */
-int usb_enable_autosuspend(struct usb_device *udev)
+void usb_enable_autosuspend(struct usb_device *udev)
 {
-       if (udev->autosuspend_disabled) {
-               udev->autosuspend_disabled = 0;
-               usb_autosuspend_device(udev);
-       }
-       return 0;
+       pm_runtime_allow(&udev->dev);
 }
 EXPORT_SYMBOL_GPL(usb_enable_autosuspend);
 
@@ -1375,16 +1371,9 @@ EXPORT_SYMBOL_GPL(usb_enable_autosuspend);
  *
  * The caller must hold @udev's device lock.
  */
-int usb_disable_autosuspend(struct usb_device *udev)
+void usb_disable_autosuspend(struct usb_device *udev)
 {
-       int rc = 0;
-
-       if (!udev->autosuspend_disabled) {
-               rc = usb_autoresume_device(udev);
-               if (rc == 0)
-                       udev->autosuspend_disabled = 1;
-       }
-       return rc;
+       pm_runtime_forbid(&udev->dev);
 }
 EXPORT_SYMBOL_GPL(usb_disable_autosuspend);
 
@@ -1528,7 +1517,7 @@ void usb_autopm_put_interface_async(struct usb_interface *intf)
        atomic_dec(&intf->pm_usage_cnt);
        pm_runtime_put_noidle(&intf->dev);
 
-       if (!udev->autosuspend_disabled) {
+       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.

diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index 43c002e..b65c1ea 100644 (file)
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -389,7 +389,7 @@ show_level(struct device *dev, struct device_attribute *attr, char *buf)
        struct usb_device *udev = to_usb_device(dev);
        const char *p = auto_string;
 
-       if (udev->state != USB_STATE_SUSPENDED && udev->autosuspend_disabled)
+       if (udev->state != USB_STATE_SUSPENDED && !udev->dev.power.runtime_auto)
                p = on_string;
        return sprintf(buf, "%s\n", p);
 }
@@ -401,7 +401,7 @@ set_level(struct device *dev, struct device_attribute *attr,
        struct usb_device *udev = to_usb_device(dev);
        int len = count;
        char *cp;
-       int rc;
+       int rc = count;
 
        cp = memchr(buf, '\n', count);
        if (cp)
@@ -411,17 +411,17 @@ set_level(struct device *dev, struct device_attribute *attr,
 
        if (len == sizeof on_string - 1 &&
                        strncmp(buf, on_string, len) == 0)
-               rc = usb_disable_autosuspend(udev);
+               usb_disable_autosuspend(udev);
 
        else if (len == sizeof auto_string - 1 &&
                        strncmp(buf, auto_string, len) == 0)
-               rc = usb_enable_autosuspend(udev);
+               usb_enable_autosuspend(udev);
 
        else
                rc = -EINVAL;
 
        usb_unlock_device(udev);
-       return (rc < 0 ? rc : count);
+       return rc;
 }
 
 static DEVICE_ATTR(level, S_IRUGO | S_IWUSR, show_level, set_level);

diff --git a/include/linux/usb.h b/include/linux/usb.h
index 9983302..e32a849 100644 (file)
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -425,7 +425,6 @@ struct usb_tt;
  * @connect_time: time device was first connected
  * @do_remote_wakeup:  remote wakeup should be enabled
  * @reset_resume: needs reset instead of resume
- * @autosuspend_disabled: autosuspend disabled by the user
  * @wusb_dev: if this is a Wireless USB device, link to the WUSB
  *     specific data for the device.
  * @slot_id: Slot ID assigned by xHCI
@@ -501,7 +500,6 @@ struct usb_device {
 
        unsigned do_remote_wakeup:1;
        unsigned reset_resume:1;
-       unsigned autosuspend_disabled:1;
 #endif
        struct wusb_dev *wusb_dev;
        int slot_id;
@@ -526,8 +524,8 @@ extern struct usb_device *usb_find_device(u16 vendor_id, u16 product_id);
 
 /* USB autosuspend and autoresume */
 #ifdef CONFIG_USB_SUSPEND
-extern int usb_enable_autosuspend(struct usb_device *udev);
-extern int usb_disable_autosuspend(struct usb_device *udev);
+extern void usb_enable_autosuspend(struct usb_device *udev);
+extern void usb_disable_autosuspend(struct usb_device *udev);
 
 extern int usb_autopm_get_interface(struct usb_interface *intf);
 extern void usb_autopm_put_interface(struct usb_interface *intf);