netdev - [PATCH 2/3] ag71xx: Call ag71xx_hw_disable() in case phy

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Message-Id: <20200217233518.3159-2-hauke@hauke-m.de>
Date:   Tue, 18 Feb 2020 00:35:17 +0100
From:   Hauke Mehrtens <hauke@...ke-m.de>
To:     davem@...emloft.net, linux@...pel-privat.de
Cc:     netdev@...r.kernel.org, jcliburn@...il.com, chris.snook@...il.com,
        Hauke Mehrtens <hauke@...ke-m.de>
Subject: [PATCH 2/3] ag71xx: Call ag71xx_hw_disable() in case phy_conenct fails

When the ag71xx_phy_connect() failed only parts of the actions done
previously in this function were reverted, because only
ag71xx_rings_cleanup() was called. My system crashed the next time
open() was called because napi_disable() was not called again and this
resulted in two calls to napi_enable(), which is not allowed.

Fix this by disabling the device again.

Signed-off-by: Hauke Mehrtens <hauke@...ke-m.de>
Fixes: d51b6ce441d3 ("net: ethernet: add ag71xx driver")
---
 drivers/net/ethernet/atheros/ag71xx.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/atheros/ag71xx.c b/drivers/net/ethernet/atheros/ag71xx.c
index 6f7281f38d5a..7d3fec009030 100644
--- a/drivers/net/ethernet/atheros/ag71xx.c
+++ b/drivers/net/ethernet/atheros/ag71xx.c
@@ -1263,18 +1263,18 @@ static int ag71xx_open(struct net_device *ndev)
 
 	ret = ag71xx_hw_enable(ag);
 	if (ret)
-		goto err;
+		return ret;
 
 	ret = ag71xx_phy_connect(ag);
 	if (ret)
-		goto err;
+		goto err_hw_disable;
 
 	phy_start(ndev->phydev);
 
 	return 0;
 
-err:
-	ag71xx_rings_cleanup(ag);
+err_hw_disable:
+	ag71xx_hw_disable(ag);
 	return ret;
 }
 
-- 
2.20.1