5.15-stable review patch. If anyone has any objections, please let me know.
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From: Rosen Penev rosenp@gmail.com
[ 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: 23a890d493e3 ("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 --- 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 4eba5a91075c0..da5dc854b6ca6 100644 --- a/drivers/net/mdio/mdio-ipq4019.c +++ b/drivers/net/mdio/mdio-ipq4019.c @@ -231,8 +231,11 @@ 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;