[PATCH v3] drm: add a check to verify the size alignment

[Christian König]

Am 11.04.22 um 11:47 schrieb Matthew Auld:
> On 11/04/2022 08:38, Arunpravin Paneer Selvam wrote:
>> Add a simple check to reject any size not aligned to the
>> min_page_size.
>>
>> when size is not aligned to min_page_size, driver module
>> should handle in their own way either to round_up() the
>> size value to min_page_size or just to enable WARN_ON().
>>
>> If we dont handle the alignment properly, we may hit the
>> following bug, Unigine Heaven has allocation requests for
>> example required pages are 257 and alignment request is 256.
>> To allocate the left over 1 page, continues the iteration to
>> find the order value which is 0 and when it compares with
>> min_order = 8, triggers the BUG_ON(order < min_order).
>>
>> v2: add more commit description
>> v3: remove WARN_ON()
>>
>> Signed-off-by: Arunpravin Paneer Selvam 
>> <Arunpravin.PaneerSelvam at amd.com>
>> Suggested-by: Matthew Auld <matthew.auld at intel.com>
> Reviewed-by: Matthew Auld <matthew.auld at intel.com>
>

Question here is who will be pushing that to drm-misc-next? Should I 
take care of that?

I think it's time that Arun should request push permission for 
drm-misc-next.

Thanks,
Christian.