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drm/amd/amdgpu: Mask rptr as well in ring debugfs 

The read/write pointers on sdma4 devices increment
beyond the ring size and should be masked.  Tested
on my Ryzen 2400G.

Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Tom St Denis 2018-03-01 09:39:57 -05:00 committed by Alex Deucher
parent 93dfdf9fde
commit a8d0fb2fa3
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
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@ -481,7 +481,7 @@ static ssize_t amdgpu_debugfs_ring_read(struct file *f, char __user *buf,
result = 0;
if (*pos < 12) {
early[0] = amdgpu_ring_get_rptr(ring);
early[0] = amdgpu_ring_get_rptr(ring) & ring->buf_mask;
early[1] = amdgpu_ring_get_wptr(ring) & ring->buf_mask;
early[2] = ring->wptr & ring->buf_mask;
for (i = *pos / 4; i < 3 && size; i++) {