On 30/03/17 12:18 AM, Christian König wrote:
> Am 29.03.2017 um 16:54 schrieb Michel Dänzer:
>> On 29/03/17 10:22 PM, Christian König wrote:
>>> Am 29.03.2017 um 11:18 schrieb Jan Burgmeier:
>>>> Signed-off-by: Jan Burgmeier <jan.burgmeier at unicon-software.com>
>>>> ---
>>>> drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 4 +++-
>>>> 1 file changed, 3 insertions(+), 1 deletion(-)
>>>>
>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>>>> index 99424cb8020b..583d22974e14 100644
>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>>>> @@ -908,6 +908,7 @@ static int amdgpu_cs_ib_fill(struct amdgpu_device
>>>> *adev,
>>>> struct amdgpu_bo *aobj = NULL;
>>>> uint64_t offset;
>>>> uint8_t *kptr;
>>>> + uint64_t it_last;
>>>> m = amdgpu_cs_find_mapping(parser, chunk_ib->va_start,
>>>> &aobj);
>>>> @@ -916,8 +917,9 @@ static int amdgpu_cs_ib_fill(struct amdgpu_device
>>>> *adev,
>>>> return -EINVAL;
>>>> }
>>>> + it_last = m->it.last;
>>>> if ((chunk_ib->va_start + chunk_ib->ib_bytes) >
>>>> - (m->it.last + 1) * AMDGPU_GPU_PAGE_SIZE) {
>>>> + (it_last + 1) * AMDGPU_GPU_PAGE_SIZE) {
>>> Nice catch, but just adding a u64 case should do here as well. E.g:
>>>
>>> if ((chunk_ib->va_start + chunk_ib->ib_bytes) >
>>> (u64)(m->it.last + 1) * AMDGPU_GPU_PAGE_SIZE) {
>> That won't work correctly if m->it.last == 0xffffffff ? Or is that not
>> possible?
> Hui, why? is it.last signed?
No. If m->it.last == 0xffffffff, (m->it.last + 1) == 0, the u64 cast
won't change that. I thought that would be bad, but maybe not?
--
Earthling Michel Dänzer | http://www.amd.com
Libre software enthusiast | Mesa and X developer
