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drm/amdgpu: Fix uninitialized variable warning in amdgpu_info_ioctl

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Check the return value of amdgpu_xcp_get_inst_details, otherwise we
may use an uninitialized variable inst_mask

Signed-off-by: Ma Jun <Jun.Ma2@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Ma Jun 2024-05-06 14:01:33 +08:00 committed by Alex Deucher
parent d768394fa9
commit 0991e49d2b
1 changed files with 9 additions and 2 deletions
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11
drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
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@ -623,25 +623,32 @@ int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
switch (type) {
case AMD_IP_BLOCK_TYPE_GFX:
ret = amdgpu_xcp_get_inst_details(xcp, AMDGPU_XCP_GFX, &inst_mask);
if (ret)
return ret;
count = hweight32(inst_mask);
break;
case AMD_IP_BLOCK_TYPE_SDMA:
ret = amdgpu_xcp_get_inst_details(xcp, AMDGPU_XCP_SDMA, &inst_mask);
if (ret)
return ret;
count = hweight32(inst_mask);
break;
case AMD_IP_BLOCK_TYPE_JPEG:
ret = amdgpu_xcp_get_inst_details(xcp, AMDGPU_XCP_VCN, &inst_mask);
if (ret)
return ret;
count = hweight32(inst_mask) * adev->jpeg.num_jpeg_rings;
break;
case AMD_IP_BLOCK_TYPE_VCN:
ret = amdgpu_xcp_get_inst_details(xcp, AMDGPU_XCP_VCN, &inst_mask);
if (ret)
return ret;
count = hweight32(inst_mask);
break;
default:
return -EINVAL;
}
if (ret)
return ret;
return copy_to_user(out, &count, min(size, 4u)) ? -EFAULT : 0;
}