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USB: update last_busy field correctly

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This patch (as966) fixes a bug in the autosuspend code.  The last_busy
field should be updated whenever any event occurs, not just events
that cause an autosuspend or an autoresume.

This partially fixes Bugzilla #8892.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2007-08-20 12:18:39 -04:00 committed by Greg Kroah-Hartman
parent 85237f202d
commit 013d27f265
1 changed files with 4 additions and 5 deletions
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9
drivers/usb/core/driver.c
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@ -1224,6 +1224,8 @@ static int usb_autopm_do_device(struct usb_device *udev, int inc_usage_cnt)
udev->auto_pm = 1;
udev->pm_usage_cnt += inc_usage_cnt;
WARN_ON(udev->pm_usage_cnt < 0);
if (inc_usage_cnt)
udev->last_busy = jiffies;
if (inc_usage_cnt >= 0 && udev->pm_usage_cnt > 0) {
if (udev->state == USB_STATE_SUSPENDED)
status = usb_resume_both(udev);
@ -1232,8 +1234,6 @@ static int usb_autopm_do_device(struct usb_device *udev, int inc_usage_cnt)
else if (inc_usage_cnt)
udev->last_busy = jiffies;
} else if (inc_usage_cnt <= 0 && udev->pm_usage_cnt <= 0) {
if (inc_usage_cnt)
udev->last_busy = jiffies;
status = usb_suspend_both(udev, PMSG_SUSPEND);
}
usb_pm_unlock(udev);
@ -1342,16 +1342,15 @@ static int usb_autopm_do_interface(struct usb_interface *intf,
else {
udev->auto_pm = 1;
intf->pm_usage_cnt += inc_usage_cnt;
udev->last_busy = jiffies;
if (inc_usage_cnt >= 0 && intf->pm_usage_cnt > 0) {
if (udev->state == USB_STATE_SUSPENDED)
status = usb_resume_both(udev);
if (status != 0)
intf->pm_usage_cnt -= inc_usage_cnt;
else if (inc_usage_cnt)
else
udev->last_busy = jiffies;
} else if (inc_usage_cnt <= 0 && intf->pm_usage_cnt <= 0) {
if (inc_usage_cnt)
udev->last_busy = jiffies;
status = usb_suspend_both(udev, PMSG_SUSPEND);
}
}