On Thu, Apr 6, 2017 at 8:03 PM, Benjamin Herrenschmidt <b...@kernel.crashing.org> wrote: > On Thu, 2017-04-06 at 08:28 -0500, Rob Herring wrote: >> >> Can you try this one [1]. >> >> Rob >> >> [1] https://lkml.org/lkml/2017/3/23/569 > > Unless I missed something, that patch doesn't change barriers or > locking, so I don't see how it could fix anything ...
Only because that's a code path that I changed recently and the locking and ordering appears to be tricky. > Mind you we haven't quite figured out exactly what's happening here. Is this with a serial port? There were some changes to serial_core close in 4.9. Rob