[PATCH v2] spi: mediatek: revise mtk_spi_probe() failure flow

[PATCH v2] spi: mediatek: revise mtk_spi_probe() failure flow

[Leilk Liu]

This patch revises failure flow while pm_runtime_enable().

Signed-off-by: Leilk Liu <leilk.liu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
---
 drivers/spi/spi-mt65xx.c |   15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index 6c1a96e..00a36da 100644
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -607,7 +607,8 @@ static int mtk_spi_probe(struct platform_device *pdev)
 	ret = clk_set_parent(mdata->sel_clk, mdata->parent_clk);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed to clk_set_parent (%d)\n", ret);
-		goto err_disable_clk;
+		clk_disable_unprepare(mdata->spi_clk);
+		goto err_put_master;
 	}
 
 	clk_disable_unprepare(mdata->spi_clk);
@@ -617,7 +618,7 @@ static int mtk_spi_probe(struct platform_device *pdev)
 	ret = devm_spi_register_master(&pdev->dev, master);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to register master (%d)\n", ret);
-		goto err_put_master;
+		goto err_disable_runtime_pm;
 	}
 
 	if (mdata->dev_comp->need_pad_sel) {
@@ -626,14 +627,14 @@ static int mtk_spi_probe(struct platform_device *pdev)
 				"pad_num does not match num_chipselect(%d != %d)\n",
 				mdata->pad_num, master->num_chipselect);
 			ret = -EINVAL;
-			goto err_put_master;
+			goto err_disable_runtime_pm;
 		}
 
 		if (!master->cs_gpios && master->num_chipselect > 1) {
 			dev_err(&pdev->dev,
 				"cs_gpios not specified and num_chipselect > 1\n");
 			ret = -EINVAL;
-			goto err_put_master;
+			goto err_disable_runtime_pm;
 		}
 
 		if (master->cs_gpios) {
@@ -644,7 +645,7 @@ static int mtk_spi_probe(struct platform_device *pdev)
 				if (ret) {
 					dev_err(&pdev->dev,
 						"can't get CS GPIO %i\n", i);
-					goto err_put_master;
+					goto err_disable_runtime_pm;
 				}
 			}
 		}
@@ -652,8 +653,8 @@ static int mtk_spi_probe(struct platform_device *pdev)
 
 	return 0;
 
-err_disable_clk:
-	clk_disable_unprepare(mdata->spi_clk);
+err_disable_runtime_pm:
+	pm_runtime_disable(&pdev->dev);
 err_put_master:
 	spi_master_put(master);
 
-- 
1.7.9.5

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Re: [PATCH v2] spi: mediatek: revise mtk_spi_probe() failure flow

[Mark Brown]

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On Tue, Nov 24, 2015 at 10:38:32AM +0800, Leilk Liu wrote:
> This patch revises failure flow while pm_runtime_enable().

This still doesn't explain what the purpose of this change is.

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Re: [PATCH v2] spi: mediatek: revise mtk_spi_probe() failure flow

[Matthias Brugger]

On 24/11/15 03:38, Leilk Liu wrote:
> This patch revises failure flow while pm_runtime_enable().

Please write a proper commit message explaining what this patch does.

>
> Signed-off-by: Leilk Liu <leilk.liu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
> ---
>   drivers/spi/spi-mt65xx.c |   15 ++++++++-------
>   1 file changed, 8 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
> index 6c1a96e..00a36da 100644
> --- a/drivers/spi/spi-mt65xx.c
> +++ b/drivers/spi/spi-mt65xx.c
> @@ -607,7 +607,8 @@ static int mtk_spi_probe(struct platform_device *pdev)
>   	ret = clk_set_parent(mdata->sel_clk, mdata->parent_clk);
>   	if (ret < 0) {
>   		dev_err(&pdev->dev, "failed to clk_set_parent (%d)\n", ret);
> -		goto err_disable_clk;
> +		clk_disable_unprepare(mdata->spi_clk);
> +		goto err_put_master;
>   	}
>
>   	clk_disable_unprepare(mdata->spi_clk);
> @@ -617,7 +618,7 @@ static int mtk_spi_probe(struct platform_device *pdev)
>   	ret = devm_spi_register_master(&pdev->dev, master);
>   	if (ret) {
>   		dev_err(&pdev->dev, "failed to register master (%d)\n", ret);
> -		goto err_put_master;
> +		goto err_disable_runtime_pm;
>   	}
>
>   	if (mdata->dev_comp->need_pad_sel) {
> @@ -626,14 +627,14 @@ static int mtk_spi_probe(struct platform_device *pdev)
>   				"pad_num does not match num_chipselect(%d != %d)\n",
>   				mdata->pad_num, master->num_chipselect);
>   			ret = -EINVAL;
> -			goto err_put_master;
> +			goto err_disable_runtime_pm;
>   		}
>
>   		if (!master->cs_gpios && master->num_chipselect > 1) {
>   			dev_err(&pdev->dev,
>   				"cs_gpios not specified and num_chipselect > 1\n");
>   			ret = -EINVAL;
> -			goto err_put_master;
> +			goto err_disable_runtime_pm;
>   		}
>
>   		if (master->cs_gpios) {
> @@ -644,7 +645,7 @@ static int mtk_spi_probe(struct platform_device *pdev)
>   				if (ret) {
>   					dev_err(&pdev->dev,
>   						"can't get CS GPIO %i\n", i);
> -					goto err_put_master;
> +					goto err_disable_runtime_pm;
>   				}
>   			}
>   		}
> @@ -652,8 +653,8 @@ static int mtk_spi_probe(struct platform_device *pdev)
>
>   	return 0;
>
> -err_disable_clk:
> -	clk_disable_unprepare(mdata->spi_clk);
> +err_disable_runtime_pm:
> +	pm_runtime_disable(&pdev->dev);
>   err_put_master:
>   	spi_master_put(master);
>
>
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Re: [PATCH v2] spi: mediatek: revise mtk_spi_probe() failure flow

[lei liu]

On Tue, 2015-11-24 at 19:12 +0100, Matthias Brugger wrote:
> 
> On 24/11/15 03:38, Leilk Liu wrote:
> > This patch revises failure flow while pm_runtime_enable().
> 
> Please write a proper commit message explaining what this patch does.
> 
OK, thanks!

> >
> > Signed-off-by: Leilk Liu <leilk.liu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
> > ---
> >   drivers/spi/spi-mt65xx.c |   15 ++++++++-------
> >   1 file changed, 8 insertions(+), 7 deletions(-)
> >
> > diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
> > index 6c1a96e..00a36da 100644
> > --- a/drivers/spi/spi-mt65xx.c
> > +++ b/drivers/spi/spi-mt65xx.c
> > @@ -607,7 +607,8 @@ static int mtk_spi_probe(struct platform_device *pdev)
> >   	ret = clk_set_parent(mdata->sel_clk, mdata->parent_clk);
> >   	if (ret < 0) {
> >   		dev_err(&pdev->dev, "failed to clk_set_parent (%d)\n", ret);
> > -		goto err_disable_clk;
> > +		clk_disable_unprepare(mdata->spi_clk);
> > +		goto err_put_master;
> >   	}
> >
> >   	clk_disable_unprepare(mdata->spi_clk);
> > @@ -617,7 +618,7 @@ static int mtk_spi_probe(struct platform_device *pdev)
> >   	ret = devm_spi_register_master(&pdev->dev, master);
> >   	if (ret) {
> >   		dev_err(&pdev->dev, "failed to register master (%d)\n", ret);
> > -		goto err_put_master;
> > +		goto err_disable_runtime_pm;
> >   	}
> >
> >   	if (mdata->dev_comp->need_pad_sel) {
> > @@ -626,14 +627,14 @@ static int mtk_spi_probe(struct platform_device *pdev)
> >   				"pad_num does not match num_chipselect(%d != %d)\n",
> >   				mdata->pad_num, master->num_chipselect);
> >   			ret = -EINVAL;
> > -			goto err_put_master;
> > +			goto err_disable_runtime_pm;
> >   		}
> >
> >   		if (!master->cs_gpios && master->num_chipselect > 1) {
> >   			dev_err(&pdev->dev,
> >   				"cs_gpios not specified and num_chipselect > 1\n");
> >   			ret = -EINVAL;
> > -			goto err_put_master;
> > +			goto err_disable_runtime_pm;
> >   		}
> >
> >   		if (master->cs_gpios) {
> > @@ -644,7 +645,7 @@ static int mtk_spi_probe(struct platform_device *pdev)
> >   				if (ret) {
> >   					dev_err(&pdev->dev,
> >   						"can't get CS GPIO %i\n", i);
> > -					goto err_put_master;
> > +					goto err_disable_runtime_pm;
> >   				}
> >   			}
> >   		}
> > @@ -652,8 +653,8 @@ static int mtk_spi_probe(struct platform_device *pdev)
> >
> >   	return 0;
> >
> > -err_disable_clk:
> > -	clk_disable_unprepare(mdata->spi_clk);
> > +err_disable_runtime_pm:
> > +	pm_runtime_disable(&pdev->dev);
> >   err_put_master:
> >   	spi_master_put(master);
> >
> >


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