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authorLiu Peibao <liupeibao@loongson.cn>2022-11-01 14:02:18 +0800
committerJakub Kicinski <kuba@kernel.org>2022-11-02 20:30:51 -0700
commit2ae34111fe4eebb69986f6490015b57c88804373 (patch)
tree8f5b806446639b0355b1a3313e7a6d007c847fd7 /drivers
parentd6dd2fe71153f0ff748bf188bd4af076fe09a0a6 (diff)
stmmac: dwmac-loongson: fix invalid mdio_node
In current code "plat->mdio_node" is always NULL, the mdio support is lost as there is no "mdio_bus_data". The original driver could work as the "mdio" variable is never set to false, which is described in commit <b0e03950dd71> ("stmmac: dwmac-loongson: fix uninitialized variable ......"). And after this commit merged, the "mdio" variable is always false, causing the mdio supoort logic lost. Fixes: 30bba69d7db4 ("stmmac: pci: Add dwmac support for Loongson") Signed-off-by: Liu Peibao <liupeibao@loongson.cn> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Link: https://lore.kernel.org/r/20221101060218.16453-1-liupeibao@loongson.cn Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
index 017dbbda0c1c..79fa7870563b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
@@ -51,7 +51,6 @@ static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id
struct stmmac_resources res;
struct device_node *np;
int ret, i, phy_mode;
- bool mdio = false;
np = dev_of_node(&pdev->dev);
@@ -69,12 +68,10 @@ static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id
if (!plat)
return -ENOMEM;
+ plat->mdio_node = of_get_child_by_name(np, "mdio");
if (plat->mdio_node) {
- dev_err(&pdev->dev, "Found MDIO subnode\n");
- mdio = true;
- }
+ dev_info(&pdev->dev, "Found MDIO subnode\n");
- if (mdio) {
plat->mdio_bus_data = devm_kzalloc(&pdev->dev,
sizeof(*plat->mdio_bus_data),
GFP_KERNEL);