diff mbox series

[v2,1/4] usb: dwc2: improve error handling in __dwc2_lowlevel_hw_enable

Message ID 20230414084137.1050487-2-fabrice.gasnier@foss.st.com
State Accepted
Commit 236d835302bd4e11697dfe65eb24a219ea5c70eb
Headers show
Series usb: dwc2: add optional clock used on stm32mp15 | expand

Commit Message

Fabrice Gasnier April 14, 2023, 8:41 a.m. UTC
Add error handling in __dwc2_lowlevel_hw_enable() that may leave the
clocks and regulators enabled upon error.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
---
 drivers/usb/dwc2/platform.c | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

Comments

Minas Harutyunyan April 18, 2023, 5:05 a.m. UTC | #1
On 4/14/23 12:41, Fabrice Gasnier wrote:
> Add error handling in __dwc2_lowlevel_hw_enable() that may leave the
> clocks and regulators enabled upon error.
> 
> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>

Acked-by: Minas Harutyunyan <hminas@synopsys.com>

> ---
>   drivers/usb/dwc2/platform.c | 19 +++++++++++++++++--
>   1 file changed, 17 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
> index d1589ba7d322..c431ce6c119f 100644
> --- a/drivers/usb/dwc2/platform.c
> +++ b/drivers/usb/dwc2/platform.c
> @@ -104,7 +104,7 @@ static int __dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg)
>   	if (hsotg->clk) {
>   		ret = clk_prepare_enable(hsotg->clk);
>   		if (ret)
> -			return ret;
> +			goto err_dis_reg;
>   	}
>   
>   	if (hsotg->uphy) {
> @@ -113,10 +113,25 @@ static int __dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg)
>   		ret = hsotg->plat->phy_init(pdev, hsotg->plat->phy_type);
>   	} else {
>   		ret = phy_init(hsotg->phy);
> -		if (ret == 0)
> +		if (ret == 0) {
>   			ret = phy_power_on(hsotg->phy);
> +			if (ret)
> +				phy_exit(hsotg->phy);
> +		}
>   	}
>   
> +	if (ret)
> +		goto err_dis_clk;
> +
> +	return 0;
> +
> +err_dis_clk:
> +	if (hsotg->clk)
> +		clk_disable_unprepare(hsotg->clk);
> +
> +err_dis_reg:
> +	regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), hsotg->supplies);
> +
>   	return ret;
>   }
>
diff mbox series

Patch

diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
index d1589ba7d322..c431ce6c119f 100644
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -104,7 +104,7 @@  static int __dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg)
 	if (hsotg->clk) {
 		ret = clk_prepare_enable(hsotg->clk);
 		if (ret)
-			return ret;
+			goto err_dis_reg;
 	}
 
 	if (hsotg->uphy) {
@@ -113,10 +113,25 @@  static int __dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg)
 		ret = hsotg->plat->phy_init(pdev, hsotg->plat->phy_type);
 	} else {
 		ret = phy_init(hsotg->phy);
-		if (ret == 0)
+		if (ret == 0) {
 			ret = phy_power_on(hsotg->phy);
+			if (ret)
+				phy_exit(hsotg->phy);
+		}
 	}
 
+	if (ret)
+		goto err_dis_clk;
+
+	return 0;
+
+err_dis_clk:
+	if (hsotg->clk)
+		clk_disable_unprepare(hsotg->clk);
+
+err_dis_reg:
+	regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), hsotg->supplies);
+
 	return ret;
 }