linux-kernel - [PATCH V3 net] net/ethernet: Fix error return when ptp

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Message-Id: <1604888277-20400-1-git-send-email-wangqing@vivo.com>
Date:   Mon,  9 Nov 2020 10:17:52 +0800
From:   Wang Qing <wangqing@...o.com>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Grygorii Strashko <grygorii.strashko@...com>,
        Samuel Zou <zou_wei@...wei.com>,
        Murali Karicheri <m-karicheri2@...com>,
        Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>,
        Wang Qing <wangqing@...o.com>,
        Kurt Kanzenbach <kurt@...utronix.de>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH V3 net] net/ethernet: Fix error return when ptp_clock is ERROR

We always have to update the value of ret, otherwise the error value
 may be the previous one. And ptp_clock_register() never return NULL
 when PTP_1588_CLOCK enable.

Signed-off-by: Wang Qing <wangqing@...o.com>
---
 drivers/net/ethernet/ti/am65-cpts.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/ti/am65-cpts.c b/drivers/net/ethernet/ti/am65-cpts.c
index 75056c1..b319d45
--- a/drivers/net/ethernet/ti/am65-cpts.c
+++ b/drivers/net/ethernet/ti/am65-cpts.c
@@ -1001,8 +1001,7 @@ struct am65_cpts *am65_cpts_create(struct device *dev, void __iomem *regs,
 	if (IS_ERR_OR_NULL(cpts->ptp_clock)) {
 		dev_err(dev, "Failed to register ptp clk %ld\n",
 			PTR_ERR(cpts->ptp_clock));
-		if (!cpts->ptp_clock)
-			ret = -ENODEV;
+		ret = PTR_ERR(cpts->ptp_clock);
 		goto refclk_disable;
 	}
 	cpts->phc_index = ptp_clock_index(cpts->ptp_clock);
-- 
2.7.4