After stmmac_probe_config_dt() succeeds, when error happens later,
stmmac_remove_config_dt() needs to be called for proper error handling.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
---
 .../ethernet/stmicro/stmmac/dwmac-starfive.c  | 34 ++++++++++++-------
 1 file changed, 21 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c
index 892612564694..b68f42795eaa 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c
@@ -111,18 +111,24 @@ static int starfive_dwmac_probe(struct platform_device *pdev)
 				     "dt configuration failed\n");
 
 	dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
-	if (!dwmac)
-		return -ENOMEM;
+	if (!dwmac) {
+		err = -ENOMEM;
+		goto err_remove_config_dt;
+	}
 
 	dwmac->clk_tx = devm_clk_get_enabled(&pdev->dev, "tx");
-	if (IS_ERR(dwmac->clk_tx))
-		return dev_err_probe(&pdev->dev, PTR_ERR(dwmac->clk_tx),
-				     "error getting tx clock\n");
+	if (IS_ERR(dwmac->clk_tx)) {
+		err = dev_err_probe(&pdev->dev, PTR_ERR(dwmac->clk_tx),
+				    "error getting tx clock\n");
+		goto err_remove_config_dt;
+	}
 
 	clk_gtx = devm_clk_get_enabled(&pdev->dev, "gtx");
-	if (IS_ERR(clk_gtx))
-		return dev_err_probe(&pdev->dev, PTR_ERR(clk_gtx),
-				     "error getting gtx clock\n");
+	if (IS_ERR(clk_gtx)) {
+		err = dev_err_probe(&pdev->dev, PTR_ERR(clk_gtx),
+				    "error getting gtx clock\n");
+		goto err_remove_config_dt;
+	}
 
 	/* Generally, the rgmii_tx clock is provided by the internal clock,
 	 * which needs to match the corresponding clock frequency according
@@ -139,15 +145,17 @@ static int starfive_dwmac_probe(struct platform_device *pdev)
 
 	err = starfive_dwmac_set_mode(plat_dat);
 	if (err)
-		return err;
+		goto err_remove_config_dt;
 
 	err = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
-	if (err) {
-		stmmac_remove_config_dt(pdev, plat_dat);
-		return err;
-	}
+	if (err)
+		goto err_remove_config_dt;
 
 	return 0;
+
+err_remove_config_dt:
+	stmmac_remove_config_dt(pdev, plat_dat);
+	return err;
 }
 
 static const struct of_device_id starfive_dwmac_match[] = {
-- 
2.40.1

On Sun, Aug 27, 2023 at 09:41:49PM +0800, Jisheng Zhang wrote:
> After stmmac_probe_config_dt() succeeds, when error happens later,
> stmmac_remove_config_dt() needs to be called for proper error handling.

Have you thought about converting to use devm_stmmac_probe_config_dt()
which will call stmmac_remove_config_dt() if the probe fails or when
the device is unbound?

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!

On Sun, 27 Aug 2023 at 15:59, Russell King (Oracle)
<linux@armlinux.org.uk> wrote:
> On Sun, Aug 27, 2023 at 09:41:49PM +0800, Jisheng Zhang wrote:
> > After stmmac_probe_config_dt() succeeds, when error happens later,
> > stmmac_remove_config_dt() needs to be called for proper error handling.
>
> Have you thought about converting to use devm_stmmac_probe_config_dt()
> which will call stmmac_remove_config_dt() if the probe fails or when
> the device is unbound?

+1. Using devm_stmmac_probe_config_dt() seems like a better solution.

> --
> RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
> FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!