[PATCH v5 09/10] drm/amdgpu: cleanup leftover queues

[Shashank Sharma]

This patch adds code to cleanup any leftover userqueues which
a user might have missed to destroy due to a crash or any other
programming error.

Cc: Alex Deucher <alexander.deucher at amd.com>
Cc: Christian Koenig <christian.koenig at amd.com>
Suggested-by: Bas Nieuwenhuizen <bas at basnieuwenhuizen.nl>
Signed-off-by: Bas Nieuwenhuizen <bas at basnieuwenhuizen.nl>
Signed-off-by: Shashank Sharma <shashank.sharma at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c | 31 ++++++++++++++++---
 1 file changed, 26 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
index 61064266c4f8..6e32e2854a58 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
@@ -57,12 +57,23 @@ amdgpu_userqueue_get_doorbell_index(struct amdgpu_userq_mgr *uq_mgr,
 	return index;
 }
 
+static void
+amdgpu_userqueue_cleanup(struct amdgpu_userq_mgr *uq_mgr,
+			 struct amdgpu_usermode_queue *queue,
+			 int queue_id)
+{
+	const struct amdgpu_userq_funcs *uq_funcs = uq_mgr->userq_funcs[queue->queue_type];
+
+	uq_funcs->mqd_destroy(uq_mgr, queue);
+	idr_remove(&uq_mgr->userq_idr, queue_id);
+	kfree(queue);
+}
+
 static int
 amdgpu_userqueue_destroy(struct drm_file *filp, int queue_id)
 {
 	struct amdgpu_fpriv *fpriv = filp->driver_priv;
 	struct amdgpu_userq_mgr *uq_mgr = &fpriv->userq_mgr;
-	const struct amdgpu_userq_funcs *uq_funcs;
 	struct amdgpu_usermode_queue *queue;
 
 	mutex_lock(&uq_mgr->userq_mutex);
@@ -73,11 +84,8 @@ amdgpu_userqueue_destroy(struct drm_file *filp, int queue_id)
 		mutex_unlock(&uq_mgr->userq_mutex);
 		return -EINVAL;
 	}
-	uq_funcs = uq_mgr->userq_funcs[queue->queue_type];
-	uq_funcs->mqd_destroy(uq_mgr, queue);
-	idr_remove(&uq_mgr->userq_idr, queue_id);
-	kfree(queue);
 
+	amdgpu_userqueue_cleanup(uq_mgr, queue, queue_id);
 	mutex_unlock(&uq_mgr->userq_mutex);
 	return 0;
 }
@@ -193,8 +201,21 @@ int amdgpu_userq_mgr_init(struct amdgpu_userq_mgr *userq_mgr, struct amdgpu_devi
 	return 0;
 }
 
+static int amdgpu_userqueue_cleanup_residue(int queue_id, void *ptr, void *data)
+{
+	struct amdgpu_userq_mgr *uq_mgr = data;
+	struct amdgpu_usermode_queue *queue = ptr;
+
+	amdgpu_userqueue_cleanup(uq_mgr, queue, queue_id);
+	return 0;
+}
+
 void amdgpu_userq_mgr_fini(struct amdgpu_userq_mgr *userq_mgr)
 {
+	idr_for_each(&userq_mgr->userq_idr,
+		     amdgpu_userqueue_cleanup_residue,
+		     userq_mgr);
+
 	idr_destroy(&userq_mgr->userq_idr);
 	mutex_destroy(&userq_mgr->userq_mutex);
 }
-- 
2.40.1