On Thu, Nov 04, 2010 at 10:16:45AM +0200, Peter Ujfalusi wrote: > The exisiting card->mutex can not be used for this purpose, > since it has been taken in probe time in the > snd_soc_instantiate_card function. Through probe calls from > this function eventually dapm_power_widgets will be called, > which will lead to dead lock. Hrm. You're right that the card mutex has issues here but just adding a lock here leaves us with a race - whenever we make a change to widget power we're doing a read/modify/write cycle and those aren't locked at all. I'm not sure if we need a lower level lock to fix that, or a higher level lock which would make this one redundant but we ought to think about it and make sure we've picked the right way. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
