diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2016-02-24 10:06:06 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2016-02-25 17:44:57 -0500 |
| commit | aac1e3caac343c05ab550fa611489bd206aa8a7b (patch) | |
| tree | 5a57da8ff80e4af80c2da6c9c789d09bc71cd2db /drivers/gpu/drm/amd/amdgpu | |
| parent | d2eaa59000c7717e68a75cf2c106f056d2bc30b4 (diff) | |
drm/amdgpu/gfx: fix off by one in rb rework (v2)
When I reworked this code, I messed up num rb count.
v2: use hweight32
Reviewed-by: Ken Wang <Qingquing.Wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c | 7 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 7 |
2 files changed, 4 insertions, 10 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c index 250bcbce7fdc..bc5bdaf3d2bb 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c @@ -1635,7 +1635,7 @@ static u32 gfx_v7_0_get_rb_active_bitmap(struct amdgpu_device *adev) static void gfx_v7_0_setup_rb(struct amdgpu_device *adev) { int i, j; - u32 data, tmp, num_rbs = 0; + u32 data; u32 active_rbs = 0; mutex_lock(&adev->grbm_idx_mutex); @@ -1655,10 +1655,7 @@ static void gfx_v7_0_setup_rb(struct amdgpu_device *adev) mutex_unlock(&adev->grbm_idx_mutex); adev->gfx.config.backend_enable_mask = active_rbs; - tmp = active_rbs; - while (tmp >>= 1) - num_rbs++; - adev->gfx.config.num_rbs = num_rbs; + adev->gfx.config.num_rbs = hweight32(active_rbs); } /** diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c index 10c865087d0a..71d536e595a2 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c @@ -2613,7 +2613,7 @@ static u32 gfx_v8_0_get_rb_active_bitmap(struct amdgpu_device *adev) static void gfx_v8_0_setup_rb(struct amdgpu_device *adev) { int i, j; - u32 data, tmp, num_rbs = 0; + u32 data; u32 active_rbs = 0; mutex_lock(&adev->grbm_idx_mutex); @@ -2629,10 +2629,7 @@ static void gfx_v8_0_setup_rb(struct amdgpu_device *adev) mutex_unlock(&adev->grbm_idx_mutex); adev->gfx.config.backend_enable_mask = active_rbs; - tmp = active_rbs; - while (tmp >>= 1) - num_rbs++; - adev->gfx.config.num_rbs = num_rbs; + adev->gfx.config.num_rbs = hweight32(active_rbs); } /** |