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| author | Srinivasan Shanmugam <srinivasan.shanmugam@amd.com> | 2024-01-03 22:05:16 +0530 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2024-01-05 16:10:43 -0500 |
| commit | 4f32504a2f85a7b40fe149436881381f48e9c0c0 (patch) | |
| tree | b717c2c4bde2a1fb264d1993483b3dec81025e01 /drivers/gpu/drm/amd/amdgpu/amdgpu_mca.c | |
| parent | c572abffe9f50c8ba33060865449313b3f588c35 (diff) | |
| download | linux-4f32504a2f85a7b40fe149436881381f48e9c0c0.tar.gz linux-4f32504a2f85a7b40fe149436881381f48e9c0c0.tar.bz2 linux-4f32504a2f85a7b40fe149436881381f48e9c0c0.zip | |
drm/amdgpu: Fix variable 'mca_funcs' dereferenced before NULL check in 'amdgpu_mca_smu_get_mca_entry()'
Fixes the below:
drivers/gpu/drm/amd/amdgpu/amdgpu_mca.c:377 amdgpu_mca_smu_get_mca_entry() warn: variable dereferenced before check 'mca_funcs' (see line 368)
357 int amdgpu_mca_smu_get_mca_entry(struct amdgpu_device *adev,
enum amdgpu_mca_error_type type,
358 int idx, struct mca_bank_entry *entry)
359 {
360 const struct amdgpu_mca_smu_funcs *mca_funcs =
adev->mca.mca_funcs;
361 int count;
362
363 switch (type) {
364 case AMDGPU_MCA_ERROR_TYPE_UE:
365 count = mca_funcs->max_ue_count;
mca_funcs is dereferenced here.
366 break;
367 case AMDGPU_MCA_ERROR_TYPE_CE:
368 count = mca_funcs->max_ce_count;
mca_funcs is dereferenced here.
369 break;
370 default:
371 return -EINVAL;
372 }
373
374 if (idx >= count)
375 return -EINVAL;
376
377 if (mca_funcs && mca_funcs->mca_get_mca_entry)
^^^^^^^^^
Checked too late!
Cc: Yang Wang <kevinyang.wang@amd.com>
Cc: Hawking Zhang <Hawking.Zhang@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Yang Wang <kevinyang.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_mca.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_mca.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mca.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_mca.c index 8911310f98df..59fafb8392e0 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mca.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mca.c @@ -360,6 +360,9 @@ int amdgpu_mca_smu_get_mca_entry(struct amdgpu_device *adev, enum amdgpu_mca_err const struct amdgpu_mca_smu_funcs *mca_funcs = adev->mca.mca_funcs; int count; + if (!mca_funcs || !mca_funcs->mca_get_mca_entry) + return -EOPNOTSUPP; + switch (type) { case AMDGPU_MCA_ERROR_TYPE_UE: count = mca_funcs->max_ue_count; @@ -374,10 +377,7 @@ int amdgpu_mca_smu_get_mca_entry(struct amdgpu_device *adev, enum amdgpu_mca_err if (idx >= count) return -EINVAL; - if (mca_funcs && mca_funcs->mca_get_mca_entry) - return mca_funcs->mca_get_mca_entry(adev, type, idx, entry); - - return -EOPNOTSUPP; + return mca_funcs->mca_get_mca_entry(adev, type, idx, entry); } #if defined(CONFIG_DEBUG_FS) |