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| author | Arvind Yadav <arvind.yadav.cs@gmail.com> | 2017-01-24 12:16:16 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-01-27 20:20:38 +0300 |
| commit | 3b2c69328280278593e0cd87e83da51bbc748ce7 (patch) | |
| tree | 47c0830e6e6d82aeee746b0c48e9546135c41042 /drivers/gpu/drm/radeon/radeon_ttm.c | |
| parent | 8ba28ac9f5cc36f91b64273b11d302e02bd77508 (diff) | |
| download | linux-3b2c69328280278593e0cd87e83da51bbc748ce7.tar.xz | |
drm: radeon: radeon_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.
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/radeon/radeon_ttm.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_ttm.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c index 7e3eb8e80095..7a10b3852970 100644 --- a/drivers/gpu/drm/radeon/radeon_ttm.c +++ b/drivers/gpu/drm/radeon/radeon_ttm.c @@ -502,6 +502,8 @@ static int radeon_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 |