Re: pwc driver bugs

From: Hans de Goede
Date: Thu May 24 2012 - 15:10:11 EST


Alan,

Thanks for adding me to the CC on this. Udo, I've
responded to your bugs in bugzilla.

Regards,

Hans


On 05/24/2012 05:56 PM, Alan Cox wrote:
On Thu, 24 May 2012 17:03:49 +0200
Udo van den Heuvel<udovdh@xxxxxxxxx> wrote:

Hello,

I discovered some issues in the pwc driver for certain USB webcams.
I opened some bugs[1].
I do think both issues might be related and the crash issue is quite
serious.

Please have a look, I can assist by testing any patches with fixes. (for
~3.3.7)

commit ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478

looks rather relevant here.

commit ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478
Author: Hans de Goede<hdegoede@xxxxxxxxxx>
Date: Wed May 9 04:43:12 2012 -0300

[media] pwc: Fix locking

My last locking rework for pwc mistakenly assumed that videbuf2 does
its own locking, but it does not! This patch fixes the missing
locking by moving over the the video_device lock, and introducing a
separate lock for the videobuf2_queue.

Signed-off-by: Hans de Goede<hdegoede@xxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab<mchehab@xxxxxxxxxx>
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