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USB: fix signed jiffies issue in autosuspend logic

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This patch (as897) changes the autosuspend timer code to use the
standard types and macros in dealing with jiffies values.

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 2007-04-11 12:06:16 -04:00 • committed by Greg Kroah-Hartman
parent ecb658d387
commit 8c9862e512
1 changed files with 12 additions and 5 deletions
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17
drivers/usb/core/driver.c
View file

@ -932,7 +932,7 @@ static int autosuspend_check(struct usb_device *udev)
{ {
int i; int i;
struct usb_interface *intf; struct usb_interface *intf;
long suspend_time; unsigned long suspend_time;
/* For autosuspend, fail fast if anything is in use or autosuspend /* For autosuspend, fail fast if anything is in use or autosuspend
* is disabled. Also fail if any interfaces require remote wakeup * is disabled. Also fail if any interfaces require remote wakeup
@ -964,11 +964,18 @@ static int autosuspend_check(struct usb_device *udev)
/* If everything is okay but the device hasn't been idle for long /* If everything is okay but the device hasn't been idle for long
* enough, queue a delayed autosuspend request. * enough, queue a delayed autosuspend request.
*/ */
suspend_time -= jiffies; if (time_after(suspend_time, jiffies)) {
if (suspend_time > 0) { if (!timer_pending(&udev->autosuspend.timer)) {
if (!timer_pending(&udev->autosuspend.timer))
/* The value of jiffies may change between the
* time_after() comparison above and the subtraction
* below. That's okay; the system behaves sanely
* when a timer is registered for the present moment
* or for the past.
*/
queue_delayed_work(ksuspend_usb_wq, &udev->autosuspend, queue_delayed_work(ksuspend_usb_wq, &udev->autosuspend,
suspend_time); suspend_time - jiffies);
}
return -EAGAIN; return -EAGAIN;
} }
return 0; return 0;