[PATCH 2/3] drm/amdgpu:Preamble is forbid to be ignored in SRIOV

[Monk Liu]

Change-Id: I6da941fa22cfaee43d6dc11191b1fb7482e7362b
Signed-off-by: Monk Liu <Monk.Liu at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
index bcd5142..7552326 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
@@ -193,7 +193,8 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs,
 		/* drop preamble IBs if we don't have a context switch */
 		if ((ib->flags & AMDGPU_IB_FLAG_PREAMBLE) &&
 			skip_preamble &&
-			!(status & AMDGPU_PREAMBLE_IB_PRESENT_FIRST))
+			!(status & AMDGPU_PREAMBLE_IB_PRESENT_FIRST) &&
+			!amdgpu_sriov_vf(adev)) /* for SRIOV preemption, Preamble CE ib must be inserted anyway */
 			continue;
 
 		amdgpu_ring_emit_ib(ring, ib, job ? job->vm_id : 0,
-- 
2.7.4