diff mbox series

[net-next,1/2] net: stmmac: dwmac-starfive: improve error handling during probe

Message ID 20230827134150.2918-2-jszhang@kernel.org (mailing list archive)
State Changes Requested
Delegated to: Netdev Maintainers
Headers show
Series net: stmmac: dwmac-starfive: some improvements | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1330 this patch: 1330
netdev/cc_maintainers success CCed 12 of 12 maintainers
netdev/build_clang success Errors and warnings before: 1353 this patch: 1353
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 1353 this patch: 1353
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 54 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Jisheng Zhang Aug. 27, 2023, 1:41 p.m. UTC
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(-)

Comments

Russell King (Oracle) Aug. 27, 2023, 1:58 p.m. UTC | #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?
Emil Renner Berthing Aug. 27, 2023, 5:35 p.m. UTC | #2
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!
diff mbox series

Patch

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[] = {