The vhost notifies the application of device readiness via
vhost_user_notify_queue_state(), but calling this function
is not protected by the lock. This patch is to make this
function call lock protected.

Fixes: d0fcc38f5fa4 ("vhost: improve device readiness notifications")
Cc: stable@dpdk.org
Signed-off-by: Jiayu Hu <redacted>
---
 lib/vhost/vhost_user.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/lib/vhost/vhost_user.c b/lib/vhost/vhost_user.c
index 8f0eba6..dabce26 100644
--- a/lib/vhost/vhost_user.c
+++ b/lib/vhost/vhost_user.c

@@ -2915,9 +2915,6 @@ vhost_user_msg_handler(int vid, int fd)
 		}
 	}
 
-	if (unlock_required)
-		vhost_user_unlock_all_queue_pairs(dev);
-
 	/* If message was not handled at this stage, treat it as an error */
 	if (!handled) {
 		VHOST_LOG_CONFIG(ERR,

@@ -2952,6 +2949,8 @@ vhost_user_msg_handler(int vid, int fd)
 		}
 	}
 
+	if (unlock_required)
+		vhost_user_unlock_all_queue_pairs(dev);
 
 	if (!virtio_is_ready(dev))
 		goto out;