linux-kernel - Re: [PATCH v2] spi: mediatek: revise mtk_spi

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Date:	Wed, 25 Nov 2015 17:14:50 +0800
From:	lei liu <leilk.liu@...iatek.com>
To:	Matthias Brugger <matthias.bgg@...il.com>
CC:	Mark Brown <broonie@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-spi@...r.kernel.org>, <linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH v2] spi: mediatek: revise mtk_spi_probe() failure flow

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@...iatek.com>
> > ---
> >   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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