USB: improved error handling in usb_port_suspend()

usb: better error handling in usb_port_suspend

- disable remote wakeup only if it was enabled
- refuse to autosuspend if remote wakeup fails to be enabled

Signed-off-by: Oliver Neukum <oliver@neukum.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Oliver Neukum 2009-10-19 13:19:41 +02:00 коммит произвёл Greg Kroah-Hartman
Родитель 54ab2b02ef
Коммит 0c487206fe
1 изменённых файлов: 7 добавлений и 2 удалений

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@ -2123,9 +2123,13 @@ int usb_port_suspend(struct usb_device *udev, pm_message_t msg)
USB_DEVICE_REMOTE_WAKEUP, 0,
NULL, 0,
USB_CTRL_SET_TIMEOUT);
if (status)
if (status) {
dev_dbg(&udev->dev, "won't remote wakeup, status %d\n",
status);
/* bail if autosuspend is requested */
if (msg.event & PM_EVENT_AUTO)
return status;
}
}
/* see 7.1.7.6 */
@ -2134,7 +2138,8 @@ int usb_port_suspend(struct usb_device *udev, pm_message_t msg)
dev_dbg(hub->intfdev, "can't suspend port %d, status %d\n",
port1, status);
/* paranoia: "should not happen" */
(void) usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
if (udev->do_remote_wakeup)
(void) usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
USB_REQ_CLEAR_FEATURE, USB_RECIP_DEVICE,
USB_DEVICE_REMOTE_WAKEUP, 0,
NULL, 0,