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authorAlan Stern <stern@rowland.harvard.edu>2007-08-20 12:18:39 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2007-08-22 14:27:59 -0700
commit013d27f265de6934ad7fb48fb29ab0172a20ab40 (patch)
tree00958fc6d3fbaeafa52c252b123e41b53a6b6322 /drivers/usb/core
parent85237f202d46d55c1bffe0c5b1aa3ddc0f1dce4d (diff)
USB: update last_busy field correctly
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>
Diffstat (limited to 'drivers/usb/core')
-rw-r--r--drivers/usb/core/driver.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index 654857493a8..a1ad11d0c47 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -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);
}
}