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cxgb4: ptp_clock_register() returns error pointers

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Check ptp_clock_register() return not only for NULL but
also for error pointers, and also nullify adapter->ptp_clock
if ptp_clock_register() fails.

Fixes: 9c33e4208b ("cxgb4: Add PTP Hardware Clock (PHC) support")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ganesh Goudar 2017-07-13 18:36:50 +05:30 committed by David S. Miller
parent 1e4babee70
commit 40fbbce007
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ethernet/chelsio/cxgb4/cxgb4_ptp.c
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@ -441,7 +441,8 @@ 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)) {
adapter->ptp_clock = NULL;
dev_err(adapter->pdev_dev,
"PTP %s Clock registration has failed\n", __func__);
return;