From: Hans Wippel <hwippel@linux.vnet.ibm.com>
Date: Thu, 21 Sep 2017 09:16:27 +0200
Subject: net/smc: add receive timeout check
Patch-mainline: v4.14-rc2
Git-commit: 846e344eb7229018457d6d6fc1ab0cc0a167692f
References: bsc#1096003, FATE#325023, LTC#164003
The SMC receive function currently lacks a timeout check under the
condition that no data were received and no data are available. This
patch adds such a check.
Signed-off-by: Hans Wippel <hwippel@linux.vnet.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Johannes Thumshirn <jthumshirn@suse.de>
---
net/smc/smc_rx.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/smc/smc_rx.c b/net/smc/smc_rx.c
index b17a333e9bb0..3e631ae4b6b6 100644
--- a/net/smc/smc_rx.c
+++ b/net/smc/smc_rx.c
@@ -148,6 +148,8 @@ int smc_rx_recvmsg(struct smc_sock *smc, struct msghdr *msg, size_t len,
read_done = sock_intr_errno(timeo);
break;
}
+ if (!timeo)
+ return -EAGAIN;
}
if (!atomic_read(&conn->bytes_to_rcv)) {