drm/amdgpu: bypass lru touch for KIQ ring submission

KIQ ring submission is used for register accessing on SRIOV
VF that could happen both in irq enabled and irq disabled cases.
Inversion lock could happen on adev->ring_lru_list_lock, while
this operation is useless and just adds overhead in this use
case.

Signed-off-by: Pixel Ding <[email protected]>
Reviewed-by: Monk Liu <[email protected]>
Reviewed-by: Christian König <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
index e5ece1fae149a3e060f28230301e090a6e56e684..a98fbbb4739f65dad15dc717c1e66722770b5420 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
@@ -136,7 +136,8 @@ void amdgpu_ring_commit(struct amdgpu_ring *ring)
        if (ring->funcs->end_use)
                ring->funcs->end_use(ring);
 
-       amdgpu_ring_lru_touch(ring->adev, ring);
+       if (ring->funcs->type != AMDGPU_RING_TYPE_KIQ)
+               amdgpu_ring_lru_touch(ring->adev, ring);
 }
 
 /**