linux-kernel - [PATCH] net/cadence/macb: fix invalid 0 return if no phy is discovered on mii init

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Message-Id: <1377606974-21240-1-git-send-email-b.brezillon@overkiz.com>
Date:	Tue, 27 Aug 2013 14:36:14 +0200
From:	Boris BREZILLON <b.brezillon@...rkiz.com>
To:	Rob Herring <rob.herring@...xeda.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Ian Campbell <ian.campbell@...rix.com>,
	Russell King <linux@....linux.org.uk>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	"David S. Miller" <davem@...emloft.net>
Cc:	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	Boris BREZILLON <b.brezillon@...rkiz.com>
Subject: [PATCH] net/cadence/macb: fix invalid 0 return if no phy is discovered on mii init

Replace misleading -1 (-EPERM) by a more appropriate return code (-ENXIO)
in macb_mii_probe function.
Save macb_mii_probe return before branching to err_out_unregister to avoid
erronous 0 return.

Signed-off-by: Boris BREZILLON <b.brezillon@...rkiz.com>
Acked-by: Nicolas Ferre <nicolas.ferre@...el.com>
---
 drivers/net/ethernet/cadence/macb.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
index fe06ab0..7660c45 100644
--- a/drivers/net/ethernet/cadence/macb.c
+++ b/drivers/net/ethernet/cadence/macb.c
@@ -276,7 +276,7 @@ static int macb_mii_probe(struct net_device *dev)
 	phydev = phy_find_first(bp->mii_bus);
 	if (!phydev) {
 		netdev_err(dev, "no PHY found\n");
-		return -1;
+		return -ENXIO;
 	}
 
 	pdata = dev_get_platdata(&bp->pdev->dev);
@@ -379,9 +379,9 @@ int macb_mii_init(struct macb *bp)
 	if (err)
 		goto err_out_free_mdio_irq;
 
-	if (macb_mii_probe(bp->dev) != 0) {
+	err = macb_mii_probe(bp->dev);
+	if (err)
 		goto err_out_unregister_bus;
-	}
 
 	return 0;
 
-- 
1.7.9.5

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