This is a note to let you know that I've just added the patch titled
stmmac: dwmac-loongson: Make sure MDIO is initialized before use
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
stmmac-dwmac-loongson-make-sure-mdio-is-initialized-.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 4e9d71701f31361d38559fa0982a7066431303a3
Author: Yanteng Si <siyanteng@xxxxxxxxxxx>
Date: Mon Dec 11 18:33:11 2023 +0800
stmmac: dwmac-loongson: Make sure MDIO is initialized before use
[ Upstream commit e87d3a1370ce9f04770d789bcf7cce44865d2e8d ]
Generic code will use mdio. If it is not initialized before use,
the kernel will Oops.
Fixes: 30bba69d7db4 ("stmmac: pci: Add dwmac support for Loongson")
Signed-off-by: Yanteng Si <siyanteng@xxxxxxxxxxx>
Signed-off-by: Feiyang Chen <chenfeiyang@xxxxxxxxxxx>
Reviewed-by: Andrew Lunn <andrew@xxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
index 2ae59f94afe1d..cef9734ef259b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
@@ -68,17 +68,15 @@ static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id
if (!plat)
return -ENOMEM;
+ plat->mdio_bus_data = devm_kzalloc(&pdev->dev,
+ sizeof(*plat->mdio_bus_data),
+ GFP_KERNEL);
+ if (!plat->mdio_bus_data)
+ return -ENOMEM;
+
plat->mdio_node = of_get_child_by_name(np, "mdio");
if (plat->mdio_node) {
dev_info(&pdev->dev, "Found MDIO subnode\n");
-
- plat->mdio_bus_data = devm_kzalloc(&pdev->dev,
- sizeof(*plat->mdio_bus_data),
- GFP_KERNEL);
- if (!plat->mdio_bus_data) {
- ret = -ENOMEM;
- goto err_put_node;
- }
plat->mdio_bus_data->needs_reset = true;
}
