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Date:   Fri, 22 May 2020 19:03:21 +0800
From:   Tiezhu Yang <yangtiezhu@...ngson.cn>
To:     "'David S. Miller'" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Xuefeng Li <lixuefeng@...ngson.cn>,
        Tiezhu Yang <yangtiezhu@...ngson.cn>
Subject: [PATCH] net: Fix return value about devm_platform_ioremap_resource()

When call function devm_platform_ioremap_resource(), we should use IS_ERR()
to check the return value and return PTR_ERR() if failed.

Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
---
 drivers/net/can/ifi_canfd/ifi_canfd.c     | 5 ++++-
 drivers/net/can/sun4i_can.c               | 2 +-
 drivers/net/dsa/b53/b53_srab.c            | 2 +-
 drivers/net/ethernet/marvell/pxa168_eth.c | 2 +-
 4 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/net/can/ifi_canfd/ifi_canfd.c b/drivers/net/can/ifi_canfd/ifi_canfd.c
index 04d59be..74503ca 100644
--- a/drivers/net/can/ifi_canfd/ifi_canfd.c
+++ b/drivers/net/can/ifi_canfd/ifi_canfd.c
@@ -947,8 +947,11 @@ static int ifi_canfd_plat_probe(struct platform_device *pdev)
 	u32 id, rev;
 
 	addr = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(addr))
+		return PTR_ERR(addr);
+
 	irq = platform_get_irq(pdev, 0);
-	if (IS_ERR(addr) || irq < 0)
+	if (irq < 0)
 		return -EINVAL;
 
 	id = readl(addr + IFI_CANFD_IP_ID);
diff --git a/drivers/net/can/sun4i_can.c b/drivers/net/can/sun4i_can.c
index e3ba8ab..e2c6cf4 100644
--- a/drivers/net/can/sun4i_can.c
+++ b/drivers/net/can/sun4i_can.c
@@ -792,7 +792,7 @@ static int sun4ican_probe(struct platform_device *pdev)
 
 	addr = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(addr)) {
-		err = -EBUSY;
+		err = PTR_ERR(addr);
 		goto exit;
 	}
 
diff --git a/drivers/net/dsa/b53/b53_srab.c b/drivers/net/dsa/b53/b53_srab.c
index 1207c30..aaa12d7 100644
--- a/drivers/net/dsa/b53/b53_srab.c
+++ b/drivers/net/dsa/b53/b53_srab.c
@@ -609,7 +609,7 @@ static int b53_srab_probe(struct platform_device *pdev)
 
 	priv->regs = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(priv->regs))
-		return -ENOMEM;
+		return PTR_ERR(priv->regs);
 
 	dev = b53_switch_alloc(&pdev->dev, &b53_srab_ops, priv);
 	if (!dev)
diff --git a/drivers/net/ethernet/marvell/pxa168_eth.c b/drivers/net/ethernet/marvell/pxa168_eth.c
index 7a0d785..17243bb 100644
--- a/drivers/net/ethernet/marvell/pxa168_eth.c
+++ b/drivers/net/ethernet/marvell/pxa168_eth.c
@@ -1418,7 +1418,7 @@ static int pxa168_eth_probe(struct platform_device *pdev)
 
 	pep->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(pep->base)) {
-		err = -ENOMEM;
+		err = PTR_ERR(pep->base);
 		goto err_netdev;
 	}
 
-- 
2.1.0

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