From: Andrew Rybchenko <arybchenko@solarflare.com>
Date: Thu, 12 Jan 2017 09:03:20 +0000 (+0000)
Subject: net/sfc: avoid usage of possibly uninitialized link mode
X-Git-Tag: spdx-start~4629
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=c7c915e1e3c81fb51fa881efe89e694a0b5b8817;hp=16994abee215e55dcccf19114b324d5c407b3f56;p=dpdk.git

net/sfc: avoid usage of possibly uninitialized link mode

In fact efx_port_poll() always initializes it, but it isn't
explicitly documented feature of the API. Moreover, the API
annocation suggests that return code should be checked.

Fixes: 886f8d8a05bf ("net/sfc: retrieve link info")

Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andrew Lee <alee@solarflare.com>
---

diff --git a/drivers/net/sfc/sfc_ethdev.c b/drivers/net/sfc/sfc_ethdev.c
index 3f0df76858..d13b6d69e5 100644
--- a/drivers/net/sfc/sfc_ethdev.c
+++ b/drivers/net/sfc/sfc_ethdev.c
@@ -198,7 +198,8 @@ retry:
 	if (wait_to_complete) {
 		efx_link_mode_t link_mode;
 
-		efx_port_poll(sa->nic, &link_mode);
+		if (efx_port_poll(sa->nic, &link_mode) != 0)
+			link_mode = EFX_LINK_UNKNOWN;
 		sfc_port_link_mode_to_info(link_mode, &current_link);
 
 		if (!rte_atomic64_cmpset((volatile uint64_t *)dev_link,