[PATCH] drm/ttm: Fix a regression causing kernel oops'es

[Christian König]

Am 12.01.23 um 13:11 schrieb Zack Rusin:
> On Thu, 2023-01-12 at 08:01 +0100, Christian König wrote:
>> !! External Email
>>
>> Am 11.01.23 um 18:50 schrieb Zack Rusin:
>>> From: Zack Rusin <zackr at vmware.com>
>>>
>>> The branch is explicitly taken if ttm == NULL which means that to avoid
>>> a null pointer reference the ttm object can not be used inside. Switch
>>> back to dst_mem to avoid kernel oops'es.
>>>
>>> This fixes kernel oops'es with any buffer objects which don't have ttm_tt,
>>> e.g. with vram based screen objects on vmwgfx.
>>>
>>> Signed-off-by: Zack Rusin <zackr at vmware.com>
>>> Fixes: e3c92eb4a84f ("drm/ttm: rework on ttm_resource to use size_t type")
>>> Cc: Somalapuram Amaranath <Amaranath.Somalapuram at amd.com>
>>> Cc: Christian König <christian.koenig at amd.com>
>> Reviewed-by: Christian König <christian.koenig at amd.com>
>>
>> Should I push it to drm-misc-fixes?
> If you're not too busy that'd be great. Otherwise I can do it tomorrow.

Done.

>
> z