On 11/26/2012 04:25 PM, Wolfgang Grandegger wrote:
> On 11/26/2012 03:28 PM, Henrik Bork Steffensen wrote:
>> In our case the lockup occurs approximately 1 time in 50 days.
> :(
Luckily we have 50 systems for in-house testing.


>
>> I am considering protecting tx objects as Wolfgang suggests in the
>> pch_can thread.
> This problem is with SMP in the first place. Can you show your .config.
I attached my .config.
> The c_can driver uses similar code than the at91_can and they have
> therefore the same issues if the kernel is preemptable, IIUC. Should not
> be a big deal to adapt the following patch:
>
>    http://marc.info/?l=linux-can&m=135391821814519&w=2
I was not aware of the relationship to c_can.

I agree, it should be very easy to implement that patch.



thank you.
Henrik.