netdev - [patch] stmmac: fix an error code in stmmac_ptp

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Message-ID: <20161014192417.GC21917@mwanda>
Date:   Fri, 14 Oct 2016 22:26:11 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Giuseppe Cavallaro <peppe.cavallaro@...com>
Cc:     Alexandre Torgue <alexandre.torgue@...com>, netdev@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: [patch] stmmac: fix an error code in stmmac_ptp_register()

PTR_ERR(NULL) is success.  We have to preserve the error code earlier.

Fixes: 7086605a6ab5 ("stmmac: fix error check when init ptp")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
Applies to net.git tree.

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c
index 289d527..5d61fb2 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c
@@ -185,8 +185,10 @@ int stmmac_ptp_register(struct stmmac_priv *priv)
 	priv->ptp_clock = ptp_clock_register(&priv->ptp_clock_ops,
 					     priv->device);
 	if (IS_ERR(priv->ptp_clock)) {
+		int ret = PTR_ERR(priv->ptp_clock);
+
 		priv->ptp_clock = NULL;
-		return PTR_ERR(priv->ptp_clock);
+		return ret;
 	}
 
 	spin_lock_init(&priv->ptp_lock);