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drm/amdgpu: bypass lru touch for KIQ ring submission

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[ Upstream commit dce1e131dd4dc68099ff1b70aa03cd2d0acf8639 ]

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 <Pixel.Ding@amd.com>
Reviewed-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pixel Ding 2017-11-08 10:20:01 +08:00 committed by Greg Kroah-Hartman
parent 73e31f2af1
commit c4760b9c8d
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
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@ -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);
}
/**