netdev - [PATCH AUTOSEL 5.13 100/189] net: mido: mdio-mux-bcm-iproc: Use devm_platform_get_and_ioremap

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Date:   Tue,  6 Jul 2021 07:12:40 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Yang Yingliang <yangyingliang@...wei.com>,
        "David S . Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>, netdev@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH AUTOSEL 5.13 100/189] net: mido: mdio-mux-bcm-iproc: Use devm_platform_get_and_ioremap_resource()

From: Yang Yingliang <yangyingliang@...wei.com>

[ Upstream commit 8a55a73433e763c8aec4a3e8df5c28c821fc44b9 ]

Use devm_platform_get_and_ioremap_resource() to simplify
code and avoid a null-ptr-deref by checking 'res' in it.

Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/mdio/mdio-mux-bcm-iproc.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/net/mdio/mdio-mux-bcm-iproc.c b/drivers/net/mdio/mdio-mux-bcm-iproc.c
index 03261e6b9ceb..aa29d6bdbdf2 100644
--- a/drivers/net/mdio/mdio-mux-bcm-iproc.c
+++ b/drivers/net/mdio/mdio-mux-bcm-iproc.c
@@ -187,7 +187,9 @@ static int mdio_mux_iproc_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	md->dev = &pdev->dev;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	md->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
+	if (IS_ERR(md->base))
+		return PTR_ERR(md->base);
 	if (res->start & 0xfff) {
 		/* For backward compatibility in case the
 		 * base address is specified with an offset.
@@ -196,9 +198,6 @@ static int mdio_mux_iproc_probe(struct platform_device *pdev)
 		res->start &= ~0xfff;
 		res->end = res->start + MDIO_REG_ADDR_SPACE_SIZE - 1;
 	}
-	md->base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(md->base))
-		return PTR_ERR(md->base);
 
 	md->mii_bus = devm_mdiobus_alloc(&pdev->dev);
 	if (!md->mii_bus) {
-- 
2.30.2