[PATCH 0/1] MR2654: libs/vkd3d: Leave the command queue op mutex locked after a partial flush.

[Giovanni Mascellani (＠giomasce)]

All return paths in d3d12_command_queue_flush_ops_locked() must
leave the op mutex locked.

(cherry-picked from upstream commit e27ceddfb4a89470d5d35ab4391d0a5cf4453ef1)

[PATCH 1/1] libs/vkd3d: Leave the command queue op mutex locked after a partial flush.

[Conor McCarthy]

From: Conor McCarthy

All return paths in d3d12_command_queue_flush_ops_locked() must
leave the op mutex locked.

(cherry-picked from upstream commit e27ceddfb4a89470d5d35ab4391d0a5cf4453ef1)
---
 libs/vkd3d/libs/vkd3d/command.c | 20 +++++++++-----------
 1 file changed, 9 insertions(+), 11 deletions(-)

diff --git a/libs/vkd3d/libs/vkd3d/command.c b/libs/vkd3d/libs/vkd3d/command.c
index e5ead7d3e4e..6eddcfa2d14 100644
--- a/libs/vkd3d/libs/vkd3d/command.c
+++ b/libs/vkd3d/libs/vkd3d/command.c
@@ -6781,16 +6781,16 @@ static bool d3d12_command_queue_op_array_append(struct d3d12_command_queue_op_ar
     return true;
 }

-static HRESULT d3d12_command_queue_fixup_after_flush(struct d3d12_command_queue *queue, unsigned int done_count)
+static void d3d12_command_queue_delete_aux_ops(struct d3d12_command_queue *queue,
+        unsigned int done_count)
 {
-    HRESULT hr;
-
     queue->aux_op_queue.count -= done_count;
     memmove(queue->aux_op_queue.ops, &queue->aux_op_queue.ops[done_count],
             queue->aux_op_queue.count * sizeof(*queue->aux_op_queue.ops));
+}

-    vkd3d_mutex_lock(&queue->op_mutex);
-
+static HRESULT d3d12_command_queue_fixup_after_flush_locked(struct d3d12_command_queue *queue)
+{
     d3d12_command_queue_swap_queues(queue);

d3d12_command_queue_op_array_append(&queue->op_queue, queue->aux_op_queue.count, queue->aux_op_queue.ops);
@@ -6798,11 +6798,7 @@ static HRESULT d3d12_command_queue_fixup_after_flush(struct d3d12_command_queue
     queue->aux_op_queue.count = 0;
     queue->is_flushing = false;

-    hr = d3d12_command_queue_record_as_blocked(queue);
-
-    vkd3d_mutex_unlock(&queue->op_mutex);
-
-    return hr;
+    return d3d12_command_queue_record_as_blocked(queue);
 }

static HRESULT d3d12_command_queue_flush_ops(struct d3d12_command_queue *queue, bool *flushed_any)
@@ -6855,7 +6851,9 @@ static HRESULT d3d12_command_queue_flush_ops_locked(struct d3d12_command_queue *
                     if (op->u.wait.value > fence->max_pending_value)
                     {
                         vkd3d_mutex_unlock(&fence->mutex);
-                        return d3d12_command_queue_fixup_after_flush(queue, i);
+                        d3d12_command_queue_delete_aux_ops(queue, i);
+                        vkd3d_mutex_lock(&queue->op_mutex);
+                        return d3d12_command_queue_fixup_after_flush_locked(queue);
                     }
                     d3d12_command_queue_wait_locked(queue, fence, op->u.wait.value);
                     d3d12_fence_decref(fence);

[PATCH 0/1] MR2654: libs/vkd3d: Leave the command queue op mutex locked after a partial flush. - approved

[Giovanni Mascellani (＠giomasce)]

This merge request was approved by Giovanni Mascellani.

[Alexandre Julliard (＠julliard)]

Could you please explain what bug is fixed by this, and why it's necessary to cherry-pick it outside of the normal upstream merge process?

[Conor McCarthy (＠cmccarthy)]

On Mon Apr 24 15:07:05 2023 +0000, Alexandre Julliard wrote:
> Could you please explain what bug is fixed by this, and why it's
> necessary to cherry-pick it outside of the normal upstream merge process?

Without this fix the affected code path unlocks an already unlocked mutex every time it runs.