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USBHID: don't recover device if suspend fails in system sleep 

If suspend callback fails in system sleep context, usb core will
ignore the failure and let the system sleep go ahead further, so this
patch doesn't recover device under this situation, otherwise
may cause resume() confused.

Acked-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ming Lei 2013-03-15 12:08:55 +08:00 committed by Greg Kroah-Hartman
parent 93e4f47f4d
commit 37093b7017
1 changed files with 5 additions and 9 deletions
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14
drivers/hid/usbhid/hid-core.c
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@ -1493,7 +1493,7 @@ static int hid_suspend(struct usb_interface *intf, pm_message_t message)
{
struct hid_device *hid = usb_get_intfdata(intf);
struct usbhid_device *usbhid = hid->driver_data;
int status;
int status = 0;
bool driver_suspended = false;
if (PMSG_IS_AUTO(message)) {
@ -1520,19 +1520,15 @@ static int hid_suspend(struct usb_interface *intf, pm_message_t message)
}
} else {
if (hid->driver && hid->driver->suspend) {
/* TODO: resume() might need to handle suspend failure */
if (hid->driver && hid->driver->suspend)
status = hid->driver->suspend(hid, message);
if (status < 0)
return status;
}
driver_suspended = true;
spin_lock_irq(&usbhid->lock);
set_bit(HID_SUSPENDED, &usbhid->iofl);
spin_unlock_irq(&usbhid->lock);
if (usbhid_wait_io(hid) < 0) {
if (usbhid_wait_io(hid) < 0)
status = -EIO;
goto failed;
}
}
hid_cancel_delayed_stuff(usbhid);
@ -1544,7 +1540,7 @@ static int hid_suspend(struct usb_interface *intf, pm_message_t message)
goto failed;
}
dev_dbg(&intf->dev, "suspend\n");
return 0;
return status;
failed:
hid_resume_common(hid, driver_suspended);