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From:   Wei Yongjun <weiyongjun1@huawei.com>
To:     Kishon Vijay Abraham I <kishon@ti.com>,
        "David S. Miller" <davem@davemloft.net>,
        Quentin Schulz <quentin.schulz@bootlin.com>
CC:     Wei Yongjun <weiyongjun1@huawei.com>,
        <linux-kernel@vger.kernel.org>, <kernel-janitors@vger.kernel.org>,
        <netdev@vger.kernel.org>
Subject: [PATCH -next] phy: phy-ocelot-serdes: fix return value check in serdes_probe()
Date:   Wed, 10 Oct 2018 02:00:24 +0000
Message-ID: <1539136824-44940-1-git-send-email-weiyongjun1@huawei.com>
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In case of error, the function syscon_node_to_regmap() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check should
be replaced with IS_ERR().

Fixes: 51f6b410fc22 ("phy: add driver for Microsemi Ocelot SerDes muxing")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
---
 drivers/phy/mscc/phy-ocelot-serdes.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/mscc/phy-ocelot-serdes.c b/drivers/phy/mscc/phy-ocelot-serdes.c
index 8936abd..b2be546 100644
--- a/drivers/phy/mscc/phy-ocelot-serdes.c
+++ b/drivers/phy/mscc/phy-ocelot-serdes.c
@@ -257,8 +257,8 @@ static int serdes_probe(struct platform_device *pdev)
 
 	ctrl->dev = &pdev->dev;
 	ctrl->regs = syscon_node_to_regmap(pdev->dev.parent->of_node);
-	if (!ctrl->regs)
-		return -ENODEV;
+	if (IS_ERR(ctrl->regs))
+		return PTR_ERR(ctrl->regs);
 
 	for (i = 0; i <= SERDES_MAX; i++) {
 		ret = serdes_phy_create(ctrl, i, &ctrl->phys[i]);