On Wed, Jul 12, 2017 at 3:42 AM, Christian König
<christian.koenig@xxxxxxx> wrote:
> Am 11.07.2017 um 21:53 schrieb Dan Carpenter:
>>
>> This is just future proofing code, not something that can be triggered
>> in real life. We're testing to make sure we don't shift wrap when we
>> do "1ull << i" so "i" has to be in the 0-63 range. If it's 64 then we
>> have gone too far.
>>
>> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
>
>
> Acked-by: Christian König <christian.koenig@xxxxxxx>
>
Applied. thanks!
Alex
>
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
>> b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
>> index 3a0b69b09ed6..e63925dffd2a 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
>> @@ -2425,7 +2425,7 @@ static int gfx_v9_0_kiq_kcq_enable(struct
>> amdgpu_device *adev)
>> /* This situation may be hit in the future if a new HW
>> * generation exposes more than 64 queues. If so, the
>> * definition of queue_mask needs updating */
>> - if (WARN_ON(i > (sizeof(queue_mask)*8))) {
>> + if (WARN_ON(i >= (sizeof(queue_mask)*8))) {
>> DRM_ERROR("Invalid KCQ enabled: %d\n", i);
>> break;
>> }
>> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
>> b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
>> index aa5a50f5eac8..85a79829842e 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
>> @@ -4564,7 +4564,7 @@ static int gfx_v8_0_kiq_kcq_enable(struct
>> amdgpu_device *adev)
>> /* This situation may be hit in the future if a new HW
>> * generation exposes more than 64 queues. If so, the
>> * definition of queue_mask needs updating */
>> - if (WARN_ON(i > (sizeof(queue_mask)*8))) {
>> + if (WARN_ON(i >= (sizeof(queue_mask)*8))) {
>> DRM_ERROR("Invalid KCQ enabled: %d\n", i);
>> break;
>> }
>> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
>> b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
>> index 955aa304ff48..0def783889cd 100644
>> --- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
>> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
>> @@ -671,7 +671,7 @@ static int set_sched_resources(struct
>> device_queue_manager *dqm)
>> /* This situation may be hit in the future if a new HW
>> * generation exposes more than 64 queues. If so, the
>> * definition of res.queue_mask needs updating */
>> - if (WARN_ON(i > (sizeof(res.queue_mask)*8))) {
>> + if (WARN_ON(i >= (sizeof(res.queue_mask)*8))) {
>> pr_err("Invalid queue enabled by amdgpu: %d\n",
>> i);
>> break;
>> }
>
>
>
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