Messages in this thread | | | Date | Mon, 13 Sep 2010 11:17:54 -0400 (EDT) | From | Alan Stern <> | Subject | Re: [linux-pm] wacom + runtime PM = AA deadlock |
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On Mon, 13 Sep 2010, Oliver Neukum wrote:
> PM in this driver looks broken. Please try this. > > In short you want to drop the PM reference and depend on remote > wakeup and busy marking for this driver. Currently it gets a reference > on every open() but never drops it. > > For locking you depend on the PM core's internal lock. You simply > make sure you have a PM reference during open() and close()
Is there any point in resuming the device during close() just in order to kill the interrupt URB? It seems counterproductive -- if the device had been suspended then there wouldn't be any interrupt URB to kill in the first place.
Alan Stern
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