net: ethernet: stmmac: fix of-node and fixed-link-phydev leaks

Make sure to deregister and free any fixed-link phy registered during
probe on probe errors and on driver unbind by adding a new glue helper
function.

Drop the of-node reference taken in the same path also on late probe
errors (and not just on driver unbind) by moving the put from
stmmac_dvr_remove() to the new helper.

Fixes: 277323814e49 ("stmmac: add fixed-link device-tree support")
Fixes: 4613b279bee7 ("ethernet: stmicro: stmmac: add missing of_node_put
after calling of_parse_phandle")
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 14 insertions, 5 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c
index e5a926b8bee7..61cb24810d10 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c
@@ -107,24 +107,33 @@ static int stm32_dwmac_probe(struct platform_device *pdev)
 		return PTR_ERR(plat_dat);
 
 	dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
-	if (!dwmac)
-		return -ENOMEM;
+	if (!dwmac) {
+		ret = -ENOMEM;
+		goto err_remove_config_dt;
+	}
 
 	ret = stm32_dwmac_parse_data(dwmac, &pdev->dev);
 	if (ret) {
 		dev_err(&pdev->dev, "Unable to parse OF data\n");
-		return ret;
+		goto err_remove_config_dt;
 	}
 
 	plat_dat->bsp_priv = dwmac;
 
 	ret = stm32_dwmac_init(plat_dat);
 	if (ret)
-		return ret;
+		goto err_remove_config_dt;
 
 	ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
 	if (ret)
-		stm32_dwmac_clk_disable(dwmac);
+		goto err_clk_disable;
+
+	return 0;
+
+err_clk_disable:
+	stm32_dwmac_clk_disable(dwmac);
+err_remove_config_dt:
+	stmmac_remove_config_dt(pdev, plat_dat);
 
 	return ret;
 }