Messages in this thread | | | Date | Thu, 13 Nov 2014 16:18:47 -0500 (EST) | From | Alan Stern <> | Subject | Re: [PATCH] HID: usbhid: get/put around clearing needs_remote_wakeup |
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On Thu, 13 Nov 2014, Benson Leung wrote:
> On Thu, Nov 13, 2014 at 12:41 PM, Alan Stern <stern@rowland.harvard.edu> wrote: > > usbhid_stop probably doesn't need it. And it should be possible to fix > > usbhid_close more easily just by interchanging the two lines: > > > > - usb_kill_urb(usbhid->urbin); > > usbhid->intf->needs_remote_wakeup = 0; > > + usb_kill_urb(usbhid->urbin); > > > > Have you tried this? > > Yes, I tried that as well, and that does work. > > I used the get/put because that's the way it was done in other > drivers, for example in synusb_close() in > drivers/input/mouse/synaptics_usb.c
In the patch description, you wrote:
> When a usbhid device that does not support remote wake > ( i.e. !device_can_wakeup() ) is closed, we fail out of > autosuspend_check() because the autosuspend check is called > before the flag is cleared as a result of usb_kill_urb(usbhid->urbin);
If you interchange the two lines then the flag _will_ be cleared before usb_kill_urb() and autosuspend_check() can run. This means your patch description is bogus.
Alan Stern
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