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Sender: Anna Schumaker <schumakeranna@gmail.com>
From:   schumaker.anna@gmail.com
To:     linux-nfs@vger.kernel.org
Cc:     Anna.Schumaker@Netapp.com
Subject: [RFC PATCH 6/7] sunrpc: Prepare xs_connect() for taking NULL tasks
Date:   Mon, 11 Jan 2021 16:41:42 -0500
Message-Id: <20210111214143.553479-7-Anna.Schumaker@Netapp.com>
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From: Anna Schumaker <Anna.Schumaker@Netapp.com>

We won't have a task structure when we go to change IP addresses, so
check for one before calling the WARN_ON() to avoid crashing.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
---
 net/sunrpc/xprtsock.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index c56a66cdf4ac..250abf1aa018 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -2311,7 +2311,8 @@ static void xs_connect(struct rpc_xprt *xprt, struct rpc_task *task)
 	struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
 	unsigned long delay = 0;
 
-	WARN_ON_ONCE(!xprt_lock_connect(xprt, task, transport));
+	if (task)
+		WARN_ON_ONCE(!xprt_lock_connect(xprt, task, transport));
 
 	if (transport->sock != NULL) {
 		dprintk("RPC:       xs_connect delayed xprt %p for %lu "
-- 
2.29.2