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[net,2/9] net/smc: add receive timeout check

Message ID 20170921071634.16883-3-ubraun@linux.vnet.ibm.com (mailing list archive)
State Not Applicable
Headers show

Commit Message

Ursula Braun Sept. 21, 2017, 7:16 a.m. UTC 
From: Hans Wippel <hwippel@linux.vnet.ibm.com>

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>
---
 net/smc/smc_rx.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

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)) {