Re: tty crash in tty_ldisc_receive_buf()

[Rob Herring]

On Thu, Apr 6, 2017 at 8:03 PM, Benjamin Herrenschmidt
<benh@xxxxxxxxxxxxxxxxxxx> 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