[PATCH] drm/radeon: take the mode_config mutex when dealing with hpds

[Alex Deucher]

On Mon, May 18, 2015 at 11:24 PM, Dave Airlie <airlied at gmail.com> wrote:
> On 19 May 2015 at 12:27, Michel Dänzer <michel at daenzer.net> wrote:
>> On 19.05.2015 01:24, Alex Deucher wrote:
>>>
>>> @@ -96,10 +98,12 @@ static void radeon_dp_work_func(struct work_struct *work)
>>>       struct drm_connector *connector;
>>>
>>>       /* this should take a mutex */
>>> +     mutex_lock(&mode_config->mutex);
>>
>> This comment can be removed?
>
> I have vague memories of not doing this, because bad things happened.
>
> so keep an eye out for lockdep traces.

I tested the non-MST handling pretty extensively, but I admit I didn't
play with mst.  Might be better to split this into two patches.

Alex