[PATCH v4 5/5] drm/amdgpu/userq: mark a queue unmapped after a per-queue reset

mes_userq_reset() unmaps the queue via the low-level mes_userq_unmap()
(REMOVE_QUEUE) but does not update queue->state, so the queue still looks
MAPPED. The destroy path then issues a second, redundant REMOVE_QUEUE for
the already-removed queue; for gfx that unmap waits on an EOP that never
arrives, times out (-110) and escalates to a full GPU reset.

Mark the queue UNMAPPED on a successful reset-path unmap so destroy skips
the redundant REMOVE_QUEUE.

Reviewed-by: Alex Deucher <[email protected]>
Signed-off-by: Jesse Zhang <[email protected]>
---
 drivers/gpu/drm/amd/amdgpu/mes_userqueue.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/mes_userqueue.c b/drivers/gpu/drm/amd/amdgpu/mes_userqueue.c
index 639e4a37f872..b5816f9a8ffd 100644
--- a/drivers/gpu/drm/amd/amdgpu/mes_userqueue.c
+++ b/drivers/gpu/drm/amd/amdgpu/mes_userqueue.c
@@ -26,6 +26,7 @@
 #include "amdgpu_gfx.h"
 #include "mes_userqueue.h"
 #include "amdgpu_userq_fence.h"
+#include "amdgpu_trace.h"
 
 #define AMDGPU_USERQ_PROC_CTX_SZ PAGE_SIZE
 #define AMDGPU_USERQ_GANG_CTX_SZ PAGE_SIZE
@@ -205,7 +206,16 @@ int mes_userq_reset(struct amdgpu_usermode_queue *queue)
 	amdgpu_mes_unlock(&adev->mes);
 	if (r)
 		return r;
-	return mes_userq_unmap(queue);
+
+	/* mes_userq_unmap() does not update queue->state; mark it UNMAPPED so the
+	 * destroy path does not issue a second REMOVE_QUEUE for the removed queue.
+	 */
+	r = mes_userq_unmap(queue);
+	if (!r) {
+		trace_amdgpu_userq_state_changed(queue, AMDGPU_USERQ_STATE_UNMAPPED);
+		queue->state = AMDGPU_USERQ_STATE_UNMAPPED;
+	}
+	return r;
 }
 
 int mes_userq_reset_queue(struct amdgpu_device *adev,
-- 
2.49.0