| Message ID | 20220307133105.GA17534@kili (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | drm/msm/adreno: fix cast in adreno_get_param() | expand |
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@oracle.com> > --- > 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@quicinc.com> -Akhil
Quoting Dan Carpenter (2022-03-07 05:31:05) > 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@oracle.com> > --- Reviewed-by: Stephen Boyd <swboyd@chromium.org>
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;
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@oracle.com> --- drivers/gpu/drm/msm/adreno/adreno_gpu.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)