linux-kernel - [PATCH 3.16 130/133] VSOCK: Fix lockdep issue.

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Message-ID: <lsq.1511315893.518971148@decadent.org.uk>
Date:   Wed, 22 Nov 2017 01:58:13 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "Jorgen Hansen" <jhansen@...are.com>,
        "Thomas Hellstrom" <thellstrom@...are.com>,
        "Michal Hocko" <mhocko@...e.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 3.16 130/133] VSOCK: Fix lockdep issue.

3.16.51-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Jorgen Hansen <jhansen@...are.com>

commit 8566b86ab9f0f45bc6f7dd422b21de9d0cf5415a upstream.

The recent fix for the vsock sock_put issue used the wrong
initializer for the transport spin_lock causing an issue when
running with lockdep checking.

Testing: Verified fix on kernel with lockdep enabled.

Reviewed-by: Thomas Hellstrom <thellstrom@...are.com>
Signed-off-by: Jorgen Hansen <jhansen@...are.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Michal Hocko <mhocko@...e.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 net/vmw_vsock/vmci_transport.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/vmw_vsock/vmci_transport.c
+++ b/net/vmw_vsock/vmci_transport.c
@@ -1570,7 +1570,7 @@ static int vmci_transport_socket_init(st
 	vmci_trans(vsk)->notify_ops = NULL;
 	INIT_LIST_HEAD(&vmci_trans(vsk)->elem);
 	vmci_trans(vsk)->sk = &vsk->sk;
-	vmci_trans(vsk)->lock = __SPIN_LOCK_UNLOCKED(vmci_trans(vsk)->lock);
+	spin_lock_init(&vmci_trans(vsk)->lock);
 	if (psk) {
 		vmci_trans(vsk)->queue_pair_size =
 			vmci_trans(psk)->queue_pair_size;