Am 23.07.2014 11:07, schrieb Michel D?nzer: > On 23.07.2014 16:47, Christian K?nig wrote: >> From: Christian K?nig <christian.koenig at amd.com> >> >> We must mask out the overflow bit as well, otherwise >> the wptr will never match the rptr again and the interrupt >> handler will loop forever. >> >> Signed-off-by: Christian K?nig <christian.koenig at amd.com> > Reviewed-by: Michel D?nzer <michel.daenzer at amd.com> > > >> Cc: stable at vger.kernel.org > Not sure this is justified though. Were you able to reproduce the > problem and verify the fix? Not yet, reproducing ring buffer overflows aren't easy to do. But I've had that multiple times with CIK and userptr support work and I can try if I can reproduce it once more.
From reading the code it looks like a rather fundamental problem to me and because of this I've added the stable Cc. Christian.
