io_uring: improve rsrc quiesce refs checks

Do a little bit of refactoring of io_rsrc_ref_quiesce(), flatten the
data refs checks and so get rid of a conditional weird unlock-else-break
construct.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/d21283e9f88a77612c746ed526d86fe3bfb58a70.1669821213.git.asml.silence@gmail.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

io_uring/rsrc.c

@@ -330,17 +330,14 @@ __cold static int io_rsrc_ref_quiesce(struct io_rsrc_data *data,
 		ret = wait_for_completion_interruptible(&data->done);
 		if (!ret) {
 			mutex_lock(&ctx->uring_lock);
-			if (atomic_read(&data->refs) > 0) {
-				/*
-				 * it has been revived by another thread while
-				 * we were unlocked
-				 */
-				mutex_unlock(&ctx->uring_lock);
-			} else {
+			if (atomic_read(&data->refs) <= 0)
 				break;
-			}
+			/*
+			 * it has been revived by another thread while
+			 * we were unlocked
+			 */
+			mutex_unlock(&ctx->uring_lock);
 		}
-
 reinit:
 		atomic_inc(&data->refs);
 		/* wait for all works potentially completing data->done */