netdev - [PATCH] net: thunderx: avoid dereferencing xcv when NULL

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Date:   Mon, 30 Jan 2017 15:06:43 +0100
From:   Vincent Stehlé <vincent.stehle@...oste.net>
To:     linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Vincent Stehlé <vincent.stehle@...oste.net>,
        Sunil Goutham <sgoutham@...ium.com>
Subject: [PATCH] net: thunderx: avoid dereferencing xcv when NULL

This fixes the following smatch and coccinelle warnings:

  drivers/net/ethernet/cavium/thunder/thunder_xcv.c:119 xcv_setup_link() error: we previously assumed 'xcv' could be null (see line 118) [smatch]
  drivers/net/ethernet/cavium/thunder/thunder_xcv.c:119:16-20: ERROR: xcv is NULL but dereferenced. [coccinelle]

Fixes: 6465859aba1e66a5 ("net: thunderx: Add RGMII interface type support")
Signed-off-by: Vincent Stehlé <vincent.stehle@...oste.net>
Cc: Sunil Goutham <sgoutham@...ium.com>
---
 drivers/net/ethernet/cavium/thunder/thunder_xcv.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/cavium/thunder/thunder_xcv.c b/drivers/net/ethernet/cavium/thunder/thunder_xcv.c
index 67befedef709..578c7f8f11bf 100644
--- a/drivers/net/ethernet/cavium/thunder/thunder_xcv.c
+++ b/drivers/net/ethernet/cavium/thunder/thunder_xcv.c
@@ -116,8 +116,7 @@ void xcv_setup_link(bool link_up, int link_speed)
 	int speed = 2;
 
 	if (!xcv) {
-		dev_err(&xcv->pdev->dev,
-			"XCV init not done, probe may have failed\n");
+		pr_err("XCV init not done, probe may have failed\n");
 		return;
 	}
 
-- 
2.11.0