diff mbox series

[2/6] usb: bdc: Cleanup clock support

Message ID 1561064991-16874-3-git-send-email-alcooperx@gmail.com (mailing list archive)
State New, archived
Headers show
Series usb: bdc: Updates and fixes to USB BDC driver | expand

Commit Message

Alan Cooper June 20, 2019, 9:09 p.m. UTC 
- Fix driver to defer on clk_get defer

Signed-off-by: Al Cooper <alcooperx@gmail.com>
---
 drivers/usb/gadget/udc/bdc/bdc_core.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

Comments

Chunfeng Yun June 21, 2019, 5:26 a.m. UTC | #1 
On Thu, 2019-06-20 at 17:09 -0400, Al Cooper wrote:
> - Fix driver to defer on clk_get defer
> 
> Signed-off-by: Al Cooper <alcooperx@gmail.com>
> ---
>  drivers/usb/gadget/udc/bdc/bdc_core.c | 15 +++++++++------
>  1 file changed, 9 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/usb/gadget/udc/bdc/bdc_core.c b/drivers/usb/gadget/udc/bdc/bdc_core.c
> index ccbd1d34eb2a..11a43de6c1c6 100644
> --- a/drivers/usb/gadget/udc/bdc/bdc_core.c
> +++ b/drivers/usb/gadget/udc/bdc/bdc_core.c
> @@ -490,8 +490,14 @@ static int bdc_probe(struct platform_device *pdev)
>  
>  	dev_dbg(dev, "%s()\n", __func__);
>  
> +	bdc = devm_kzalloc(dev, sizeof(*bdc), GFP_KERNEL);
> +	if (!bdc)
> +		return -ENOMEM;
> +
>  	clk = devm_clk_get(dev, "sw_usbd");
>  	if (IS_ERR(clk)) {
> +		if (PTR_ERR(clk) == -EPROBE_DEFER)
> +			return -EPROBE_DEFER;
what about using devm_clk_get_optional()?

>  		dev_info(dev, "Clock not found in Device Tree\n");
>  		clk = NULL;
>  	}
> @@ -501,11 +507,6 @@ static int bdc_probe(struct platform_device *pdev)
>  		dev_err(dev, "could not enable clock\n");
>  		return ret;
>  	}
> -
> -	bdc = devm_kzalloc(dev, sizeof(*bdc), GFP_KERNEL);
> -	if (!bdc)
> -		return -ENOMEM;
> -
>  	bdc->clk = clk;
>  
>  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> @@ -551,7 +552,7 @@ static int bdc_probe(struct platform_device *pdev)
>  	ret = bdc_phy_init(bdc);
>  	if (ret) {
>  		dev_err(bdc->dev, "BDC phy init failure:%d\n", ret);
> -		return ret;
> +		goto clk_cleanup;
>  	}
>  
>  	temp = bdc_readl(bdc->regs, BDC_BDCCAP1);
> @@ -583,6 +584,8 @@ static int bdc_probe(struct platform_device *pdev)
>  	bdc_hw_exit(bdc);
>  phycleanup:
>  	bdc_phy_exit(bdc);
> +clk_cleanup:
> +	clk_disable_unprepare(bdc->clk);
>  	return ret;
>  }
>
Alan Cooper June 21, 2019, 1:44 p.m. UTC | #2 
> > diff --git a/drivers/usb/gadget/udc/bdc/bdc_core.c b/drivers/usb/gadget/udc/bdc/bdc_core.c
> > index ccbd1d34eb2a..11a43de6c1c6 100644
> > --- a/drivers/usb/gadget/udc/bdc/bdc_core.c
> > +++ b/drivers/usb/gadget/udc/bdc/bdc_core.c
> > @@ -490,8 +490,14 @@ static int bdc_probe(struct platform_device *pdev)
> >
> >       dev_dbg(dev, "%s()\n", __func__);
> >
> > +     bdc = devm_kzalloc(dev, sizeof(*bdc), GFP_KERNEL);
> > +     if (!bdc)
> > +             return -ENOMEM;
> > +
> >       clk = devm_clk_get(dev, "sw_usbd");
> >       if (IS_ERR(clk)) {
> > +             if (PTR_ERR(clk) == -EPROBE_DEFER)
> > +                     return -EPROBE_DEFER;
> what about using devm_clk_get_optional()?

Good suggestion.
Thanks
Al


On Fri, Jun 21, 2019 at 1:26 AM Chunfeng Yun <chunfeng.yun@mediatek.com> wrote:
>
> On Thu, 2019-06-20 at 17:09 -0400, Al Cooper wrote:
> > - Fix driver to defer on clk_get defer
> >
> > Signed-off-by: Al Cooper <alcooperx@gmail.com>
> > ---
> >  drivers/usb/gadget/udc/bdc/bdc_core.c | 15 +++++++++------
> >  1 file changed, 9 insertions(+), 6 deletions(-)
> >
> > diff --git a/drivers/usb/gadget/udc/bdc/bdc_core.c b/drivers/usb/gadget/udc/bdc/bdc_core.c
> > index ccbd1d34eb2a..11a43de6c1c6 100644
> > --- a/drivers/usb/gadget/udc/bdc/bdc_core.c
> > +++ b/drivers/usb/gadget/udc/bdc/bdc_core.c
> > @@ -490,8 +490,14 @@ static int bdc_probe(struct platform_device *pdev)
> >
> >       dev_dbg(dev, "%s()\n", __func__);
> >
> > +     bdc = devm_kzalloc(dev, sizeof(*bdc), GFP_KERNEL);
> > +     if (!bdc)
> > +             return -ENOMEM;
> > +
> >       clk = devm_clk_get(dev, "sw_usbd");
> >       if (IS_ERR(clk)) {
> > +             if (PTR_ERR(clk) == -EPROBE_DEFER)
> > +                     return -EPROBE_DEFER;
> what about using devm_clk_get_optional()?
>
> >               dev_info(dev, "Clock not found in Device Tree\n");
> >               clk = NULL;
> >       }
> > @@ -501,11 +507,6 @@ static int bdc_probe(struct platform_device *pdev)
> >               dev_err(dev, "could not enable clock\n");
> >               return ret;
> >       }
> > -
> > -     bdc = devm_kzalloc(dev, sizeof(*bdc), GFP_KERNEL);
> > -     if (!bdc)
> > -             return -ENOMEM;
> > -
> >       bdc->clk = clk;
> >
> >       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > @@ -551,7 +552,7 @@ static int bdc_probe(struct platform_device *pdev)
> >       ret = bdc_phy_init(bdc);
> >       if (ret) {
> >               dev_err(bdc->dev, "BDC phy init failure:%d\n", ret);
> > -             return ret;
> > +             goto clk_cleanup;
> >       }
> >
> >       temp = bdc_readl(bdc->regs, BDC_BDCCAP1);
> > @@ -583,6 +584,8 @@ static int bdc_probe(struct platform_device *pdev)
> >       bdc_hw_exit(bdc);
> >  phycleanup:
> >       bdc_phy_exit(bdc);
> > +clk_cleanup:
> > +     clk_disable_unprepare(bdc->clk);
> >       return ret;
> >  }
> >
>
>
diff mbox series

Patch

diff --git a/drivers/usb/gadget/udc/bdc/bdc_core.c b/drivers/usb/gadget/udc/bdc/bdc_core.c
index ccbd1d34eb2a..11a43de6c1c6 100644
--- a/drivers/usb/gadget/udc/bdc/bdc_core.c
+++ b/drivers/usb/gadget/udc/bdc/bdc_core.c
@@ -490,8 +490,14 @@  static int bdc_probe(struct platform_device *pdev)
 
 	dev_dbg(dev, "%s()\n", __func__);
 
+	bdc = devm_kzalloc(dev, sizeof(*bdc), GFP_KERNEL);
+	if (!bdc)
+		return -ENOMEM;
+
 	clk = devm_clk_get(dev, "sw_usbd");
 	if (IS_ERR(clk)) {
+		if (PTR_ERR(clk) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
 		dev_info(dev, "Clock not found in Device Tree\n");
 		clk = NULL;
 	}
@@ -501,11 +507,6 @@  static int bdc_probe(struct platform_device *pdev)
 		dev_err(dev, "could not enable clock\n");
 		return ret;
 	}
-
-	bdc = devm_kzalloc(dev, sizeof(*bdc), GFP_KERNEL);
-	if (!bdc)
-		return -ENOMEM;
-
 	bdc->clk = clk;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -551,7 +552,7 @@  static int bdc_probe(struct platform_device *pdev)
 	ret = bdc_phy_init(bdc);
 	if (ret) {
 		dev_err(bdc->dev, "BDC phy init failure:%d\n", ret);
-		return ret;
+		goto clk_cleanup;
 	}
 
 	temp = bdc_readl(bdc->regs, BDC_BDCCAP1);
@@ -583,6 +584,8 @@  static int bdc_probe(struct platform_device *pdev)
 	bdc_hw_exit(bdc);
 phycleanup:
 	bdc_phy_exit(bdc);
+clk_cleanup:
+	clk_disable_unprepare(bdc->clk);
 	return ret;
 }