Re: [Freedreno] [PATCH] drm/msm/adreno: fix cast in adreno_get_param()

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On 3/7/2022 7:01 PM, Dan Carpenter wrote:
These casts need to happen before the shift.  The only time it would
matter would be if "rev.core" is >= 128.  In that case the sign bit
would be extended and we do not want that.

Fixes: afab9d91d872 ("drm/msm/adreno: Expose speedbin to userspace")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
  drivers/gpu/drm/msm/adreno/adreno_gpu.c | 8 ++++----
  1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
index 15c8997b7251..f7b3f6d266a9 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
@@ -244,10 +244,10 @@ int adreno_get_param(struct msm_gpu *gpu, struct msm_file_private *ctx,
  		*value = !adreno_is_a650_family(adreno_gpu) ? 0x100000 : 0;
  		return 0;
  	case MSM_PARAM_CHIP_ID:
-		*value = (uint64_t) adreno_gpu->rev.patchid |
-				(uint64_t) (adreno_gpu->rev.minor << 8) |
-				(uint64_t) (adreno_gpu->rev.major << 16) |
-				(uint64_t) (adreno_gpu->rev.core << 24);
+		*value =  (uint64_t)adreno_gpu->rev.patchid |
+			 ((uint64_t)adreno_gpu->rev.minor << 8) |
+			 ((uint64_t)adreno_gpu->rev.major << 16) |
+			 ((uint64_t)adreno_gpu->rev.core  << 24);
  		if (!adreno_gpu->info->revn)
  			*value |= ((uint64_t) adreno_gpu->speedbin) << 32;
  		return 0;
Reviewed-by: Akhil P Oommen <quic_akhilpo@xxxxxxxxxxx>

-Akhil



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