From a231e6283e1c79a33d6f3bdf786832f10e355d0c Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Fri, 17 Jul 2020 18:19:58 +0200
Subject: [KERNEL] Trying to get locking under control

Current code doesn't pay much attention to properly locking when
accessing structures that are being used in multiple workers/threads.
Try to fix this, slowly.
---
 src/kernel/net-txrx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/kernel/net-txrx.c')

diff --git a/src/kernel/net-txrx.c b/src/kernel/net-txrx.c
index c839561..51c684d 100644
--- a/src/kernel/net-txrx.c
+++ b/src/kernel/net-txrx.c
@@ -345,8 +345,8 @@ int dnbd3_receive_cmd_get_block_mq(struct dnbd3_sock *sock,
 		error_sock(sock, "unexpected reply (%d) %p", tag, req);
 		if (req) {
 			cmd = blk_mq_rq_to_pdu(req);
-			mutex_lock(&cmd->lock);
 			debug_sock(sock, "requeue request");
+			mutex_lock(&cmd->lock);
 			dnbd3_requeue_cmd(cmd);
 			mutex_unlock(&cmd->lock);
 		}
-- 
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