linux-kernel - [PATCH v2] net: macb: undo operations in case of failure

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Date:   Thu, 18 Jun 2020 11:37:40 +0300
From:   Claudiu Beznea <claudiu.beznea@...rochip.com>
To:     <nicolas.ferre@...rochip.com>, <davem@...emloft.net>,
        <kuba@...nel.org>, <linux@...linux.org.uk>
CC:     <antoine.tenart@...tlin.com>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>
Subject: [PATCH v2] net: macb: undo operations in case of failure

Undo previously done operation in case macb_phylink_connect()
fails. Since macb_reset_hw() is the 1st undo operation the
napi_exit label was renamed to reset_hw.

Fixes: 7897b071ac3b ("net: macb: convert to phylink")
Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
---

Changes in v2:
- corrected fixes SHA1

 drivers/net/ethernet/cadence/macb_main.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 67933079aeea..257c4920cb88 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -2558,7 +2558,7 @@ static int macb_open(struct net_device *dev)
 
 	err = macb_phylink_connect(bp);
 	if (err)
-		goto napi_exit;
+		goto reset_hw;
 
 	netif_tx_start_all_queues(dev);
 
@@ -2567,9 +2567,11 @@ static int macb_open(struct net_device *dev)
 
 	return 0;
 
-napi_exit:
+reset_hw:
+	macb_reset_hw(bp);
 	for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
 		napi_disable(&queue->napi);
+	macb_free_consistent(bp);
 pm_exit:
 	pm_runtime_put_sync(&bp->pdev->dev);
 	return err;
-- 
2.7.4