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

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Message-Id: <1499783078-4706-1-git-send-email-ganeshgr@chelsio.com>
Date:   Tue, 11 Jul 2017 19:54:38 +0530
From:   Ganesh Goudar <ganeshgr@...lsio.com>
To:     netdev@...r.kernel.org, davem@...emloft.net
Cc:     dan.carpenter@...cle.com, atul.gupta@...lsio.com,
        Ganesh Goudar <ganeshgr@...lsio.com>,
        Richard Cochran <richardcochran@...il.com>
Subject: [PATCH net] cxgb4: ptp_clock_register() returns error pointers

Check ptp_clock_register() return not only for NULL but
also for error pointers.

Fixes: 9c33e4208bce ("cxgb4: Add PTP Hardware Clock (PHC) support")
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Cc: Richard Cochran <richardcochran@...il.com>
Signed-off-by: Ganesh Goudar <ganeshgr@...lsio.com>
---
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_ptp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ptp.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ptp.c
index 50517cf..06c0de4 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_OR_NULL(adapter->ptp_clock)) {
 		dev_err(adapter->pdev_dev,
 			"PTP %s Clock registration has failed\n", __func__);
 		return;
-- 
2.1.0