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drm/amd/amdgpu: Correct ring wptr address in debugfs (v2) 

On gfx9 hardware the value is not wrapped and is a 64-bit value.  So
we reduce it modulo the ring size.

Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>

(v2) use buf_mask instead of computing on the fly

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Tom St Denis 2017-03-29 13:01:30 -04:00 committed by Alex Deucher
parent 1866bac897
commit ec63982e90
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
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@ -320,8 +320,8 @@ static ssize_t amdgpu_debugfs_ring_read(struct file *f, char __user *buf,
if (*pos < 12) {
early[0] = amdgpu_ring_get_rptr(ring);
early[1] = amdgpu_ring_get_wptr(ring);
early[2] = ring->wptr;
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++) {
r = put_user(early[i], (uint32_t *)buf);
if (r)