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Commit b85007c9 authored by Tom St Denis's avatar Tom St Denis Committed by Greg Kroah-Hartman
Browse files

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: 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>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 8302e9d2

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

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