From 9cc8d0ecdd2aad42e377e971e3bb114339df609e Mon Sep 17 00:00:00 2001 From: Rosen Penev Date: Thu, 21 Nov 2024 11:31:52 -0800 Subject: [PATCH] net: mdio-ipq4019: add missing error check If an optional resource is found but fails to remap, return on failure. Avoids any potential problems when using the iomapped resource as the assumption is that it's available. Fixes: 23a890d493e3 ("net: mdio: Add the reset function for IPQ MDIO driver") Signed-off-by: Rosen Penev Reviewed-by: Andrew Lunn Link: https://patch.msgid.link/20241121193152.8966-1-rosenp@gmail.com Signed-off-by: Paolo Abeni --- drivers/net/mdio/mdio-ipq4019.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/mdio/mdio-ipq4019.c b/drivers/net/mdio/mdio-ipq4019.c index dd3ed2d6430b1..d9a94df482d9f 100644 --- a/drivers/net/mdio/mdio-ipq4019.c +++ b/drivers/net/mdio/mdio-ipq4019.c @@ -352,8 +352,11 @@ static int ipq4019_mdio_probe(struct platform_device *pdev) /* The platform resource is provided on the chipset IPQ5018 */ /* This resource is optional */ res = platform_get_resource(pdev, IORESOURCE_MEM, 1); - if (res) + if (res) { priv->eth_ldo_rdy = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(priv->eth_ldo_rdy)) + return PTR_ERR(priv->eth_ldo_rdy); + } bus->name = "ipq4019_mdio"; bus->read = ipq4019_mdio_read_c22; -- 2.49.0