Re: [PATCH] cx23885/vb2 regression: please test this patch

[Raimonds Cicans <ray@apollo.lv>]

On 13.01.2015 19:55, Raimonds Cicans wrote:
> On 13.01.2015 16:01, Hans Verkuil wrote:
>> Hi Raimonds, Jurgen,
>>
>> Can you both test this patch? It should (I hope) solve the problems you
>> both had with the cx23885 driver.
>>
>> This patch fixes a race condition in the vb2_thread that occurs when
>> the thread is stopped. The crucial fix is calling kthread_stop much
>> earlier in vb2_thread_stop(). But I also made the vb2_thread more
>> robust.
>
> With this patch I am unable to get any error except first
> (AMD-Vi: Event logged [IO_PAGE_FAULT...).
> But I am not convinced, because before patch I get
> first error much often and earlier than almost any other error,
> so it may be just "bad luck" and other errors do not
> appear because first error appear earlier.
>
I noticed that if I "initialize" card with commands:
/usr/bin/dvb-fe-tool -a 4 -d DVBS
/usr/bin/dvb-fe-tool -a 5 -d DVBS

and then run load which starts on first front-end and
only after some time on second, then I receive first
error much later or do not receive at all (for example
I was able to run VDR whole night without problems)


Raimonds Cicans