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>
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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