netdev - [PATCH 2/2 net] cxgb4: ptp_clock_register() returns error pointers

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Date:   Mon, 10 Jul 2017 10:16:15 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Ganesh Goudar <ganeshgr@...lsio.com>,
        Atul Gupta <atul.gupta@...lsio.com>
Cc:     netdev@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH 2/2 net] cxgb4: ptp_clock_register() returns error pointers

We're checking ptp_clock_register() for NULL but we should be checking
for error pointers.

Fixes: 9c33e4208bce ("cxgb4: Add PTP Hardware Clock (PHC) support")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ptp.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ptp.c
index 50517cfd9671..c24313a103c6 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ptp.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ptp.c
@@ -441,7 +441,7 @@ void cxgb4_ptp_init(struct adapter *adapter)
 
 	adapter->ptp_clock = ptp_clock_register(&adapter->ptp_clock_info,
 						&adapter->pdev->dev);
-	if (!adapter->ptp_clock) {
+	if (IS_ERR(adapter->ptp_clock)) {
 		dev_err(adapter->pdev_dev,
 			"PTP %s Clock registration has failed\n", __func__);
 		return;