FAILED: patch "[PATCH] io_uring: Fix race condition when sqp thread goes to sleep" failed to apply to 5.12-stable tree

The patch below does not apply to the 5.12-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 997135017716c33f3405e86cca5da9567b40a08e Mon Sep 17 00:00:00 2001
From: Olivier Langlois <[email protected]>
Date: Wed, 23 Jun 2021 11:50:11 -0700
Subject: [PATCH] io_uring: Fix race condition when sqp thread goes to sleep

If an asynchronous completion happens before the task is preparing itself to wait and set its state to TASK_INTERRUPTIBLE, the completion will not wake up the sqp thread.

index fc8637f591a6..7c545fa66f31 100644
@@ -6902,7 +6902,7 @@ static int io_sq_thread(void *data)
 		}
 
 		prepare_to_wait(&sqd->wait, &wait, TASK_INTERRUPTIBLE);
-		if (!io_sqd_events_pending(sqd)) {
+		if (!io_sqd_events_pending(sqd) && !io_run_task_work()) {
 			needs_sched = true;
 			list_for_each_entry(ctx, &sqd->ctx_list, sqd_list) {
 				io_ring_set_wakeup_flag(ctx);