diff options
| author | Tom St Denis <tom.stdenis@amd.com> | 2017-05-23 11:35:22 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-07-27 15:08:02 -0700 |
| commit | b85007c9114a05c696c46c2aac6da68aeaed7bbc (patch) | |
| tree | ad31dffab26cd9460d5cf714a51c6b26e941119c | |
| parent | 8302e9d2f50b4358e4419deae2b09e0ccca766c6 (diff) | |
drm/amd/amdgpu: Return error if initiating read out of range on vram
commit 9156e723301c0a7a7def4cde820e018ce791b842 upstream.
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.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 dcaf691f56b5..264899df9bfc 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -1419,6 +1419,9 @@ 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; |