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| author | Arvind Yadav <arvind.yadav.cs@gmail.com> | 2017-01-24 14:55:33 +0530 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-01-27 12:20:38 -0500 |
| commit | 8ba28ac9f5cc36f91b64273b11d302e02bd77508 (patch) | |
| tree | 68aff7e691359fc5db0d797c4bcd1d7cca6de0f6 /drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | |
| parent | 967de2a9dcd52b248e447608fa03d30db4eb05ed (diff) | |
| download | linux-8ba28ac9f5cc36f91b64273b11d302e02bd77508.tar.bz2 | |
drm/amd/amdgpu/amdgpu_ttm: Handle return NULL error from ioremap_nocache
Here, If ioremap_nocache will fail. It will return NULL.
Kernel can run into a NULL-pointer dereference.
This error check will avoid NULL pointer dereference.
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 10e9b690676e..1154b0a8881d 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -548,6 +548,8 @@ static int amdgpu_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_ mem->bus.addr = ioremap_nocache(mem->bus.base + mem->bus.offset, mem->bus.size); + if (!mem->bus.addr) + return -ENOMEM; /* * Alpha: Use just the bus offset plus |