Re: [PATCH 2/3] HID: usbhid: hid-core: submit queued urbs before suspend

[Oliver Neukum]

Am Donnerstag, 17. November 2011, 12:23:49 schrieb Daniel Kurtz:
> Unfortunately, this usually happens while the first LED request is
> actually still being processed.  Thus when the completion handler tries
> to submit the second LED request it fails, since REPORTED_IDLE is
> already set!  This REPORTED_IDLE check failure causes the completion
> handler to complete, however without clearing the CTRL_RUNNING flag.
> This, in turn, means that the suspend() handler's wait_io() condition
> is never satisfied, and instead it times out after 10 seconds, aborting
> the original system suspend.
> 
> This patch changes the behavior to the following:
>   (1) allow completion handler to finish submitting all queued URBs, even if
>       REPORTED_IDLE is set.  This guarantees that all URBs queued before the
>       hid-core suspend() call will be submitted before the system is
>       suspended.

Hi,

why is this desirable? You'd want to requests to be executed at resumption.
A system suspend will alter the LED state anyway.

	Regards
		Oliver
-- 
- - - 
SUSE LINUX Products GmbH, GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer, HRB 16746 (AG Nürnberg) 
Maxfeldstraße 5                         
90409 Nürnberg 
Germany 
- - - 
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/