Messages in this thread | | | Date | Fri, 7 Mar 2014 12:53:57 +0100 | From | Sebastian Andrzej Siewior <> | Subject | Re: nouveau crash due to missing channel (WAS: Re: [ANNOUNCE] 3.12.12-rt19) |
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* Maarten Lankhorst | 2014-03-07 12:36:13 [+0100]:
>>I can't find any kind of locking so my question is what ensures that chan is >>not set to NULL between nouveau_fence_done() and >>nouveau_fence_wait_uevent()? There are just a few opcodes in between but >>nothing that pauses nouveau_fence_signal(). >Absolutely nothing. :-) Worse still, there's no guarantee that channel isn't freed, but hopefully that is less likely to be an issue.
Okay, so I hit the correct spot. What do we do here? Do you want the patch I posted without the WARN_ON() or do you prefer to fix this in an other way?
>~Maarten
Sebastian
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