[PATCH] drm/amdgpu: Update VM flush condition for 'enforce_isolation'

[Srinivasan Shanmugam]

This patch updates the `amdgpu_vm_flush` function to ensure the cleaner
shader is emitted when `enforce_isolation` is true and `vmid` is not set
(ie., when job does not have a specific, unique memory space assigned to
it. Instead, it uses a shared or common memory space that is accessible
to multiple jobs or processes). Previously, the cleaner shader could be
skipped if no VM flush, GDS switch, or pipe sync was needed, causing
issues when manually triggering the cleaner shader.

The new condition includes a check for `!(job->enforce_isolation &&
!job->vmid)`, ensuring the cleaner shader is emitted when necessary in
scenarios requiring enforced isolation.

Fixes: 2feee98e6f2c ("drm/amdgpu: Update VM flush condition for 'enforce_isolation'")
Cc: Christian König <christian.koenig at amd.com>
Cc: Alex Deucher <alexander.deucher at amd.com>
Suggested-by: Christian König <christian.koenig at amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index db913d533898..77af9c389eae 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -674,7 +674,8 @@ int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job,
 	pasid_mapping_needed &= adev->gmc.gmc_funcs->emit_pasid_mapping &&
 		ring->funcs->emit_wreg;
 
-	if (!vm_flush_needed && !gds_switch_needed && !need_pipe_sync)
+	if (!vm_flush_needed && !gds_switch_needed && !need_pipe_sync &&
+	    !(job->enforce_isolation && !job->vmid))
 		return 0;
 
 	amdgpu_ring_ib_begin(ring);
-- 
2.34.1