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net: mdio-ipq4019: add missing error check

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BugLink: https://bugs.launchpad.net/bugs/2101915

[ Upstream commit 9cc8d0ecdd2aad42e377e971e3bb114339df609e ]

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: 23a890d493 ("net: mdio: Add the reset function for IPQ MDIO driver")
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20241121193152.8966-1-rosenp@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Rosen Penev
2025-03-11 08:51:19 +09:00
committed by Stefan Bader
parent 16a70d9b9c
commit b4fa483556
1 changed files with 4 additions and 1 deletions
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drivers/net/mdio/mdio-ipq4019.c
+4 -1
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@@ -255,8 +255,11 @@ 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;