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Commit 9156e723 authored by Tom St Denis's avatar Tom St Denis Committed by Alex Deucher
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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: default avatarTom St Denis <tom.stdenis@amd.com>
Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent e7f78b69

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

+3 −0
Original line number Diff line number Diff line
@@ -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;