Commit 9a0b375b authored by Tom St Denis's avatar Tom St Denis Committed by Greg Kroah-Hartman

drm/amd/amdgpu: Return error if initiating read out of range on vram

commit 9156e723 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 f64c0826
......@@ -1462,6 +1462,9 @@ 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;
......
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