diff options
| author | Tom St Denis <tom.stdenis@amd.com> | 2017-05-23 11:35:22 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-05-24 18:23:55 -0400 |
| commit | 9156e723301c0a7a7def4cde820e018ce791b842 (patch) | |
| tree | 25e3490da0e52e2c7b4c5f39a609b63c048e5740 /drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | |
| parent | e7f78b69aba479728865ef3ec4229b372fc79f94 (diff) | |
drm/amd/amdgpu: Return error if initiating read out of range on vram
If you initiate a read that is out of the VRAM address space return
ENXIO instead of 0.
Reads that begin below that point will read upto the VRAM limit as
before.
Cc: stable@vger.kernel.org
Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.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 | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index fcf617c237ef..8526a0222268 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -1468,6 +1468,9 @@ static ssize_t amdgpu_ttm_vram_read(struct file *f, char __user *buf, if (size & 0x3 || *pos & 0x3) return -EINVAL; + if (*pos >= adev->mc.mc_vram_size) + return -ENXIO; + while (size) { unsigned long flags; uint32_t value; |