[PATCH] drm/amdgpu: potential shift wrapping bug

Dan Carpenter dan.carpenter at oracle.com
Thu Aug 10 12:38:43 UTC 2017


On Thu, Aug 10, 2017 at 02:30:15PM +0200, Christian König wrote:
> Am 10.08.2017 um 14:16 schrieb Dan Carpenter:
> > "frag_align" is a u64, so presumably we want to use the high bits as
> > well instead of shift wrapping.
> > 
> > Fixes: 6be7adb37d9b ("drm/amdgpu: increase fragmentation size for Vega10 v2")
> > Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
> 
> The fragment field has only 5bits in hardware and can never be more than 31,
> so the correct fix would actually be using uint32_t here instead.
> 

Alright.  Thanks.  I'll resend.

regards,
dan carpenter



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