* [PATCH v1] PM / devfreq: exynos-nocp : Handle return value of clk_prepare_enable @ 2017-05-19 10:50 ` Arvind Yadav 2017-05-23 9:43 ` Chanwoo Choi 0 siblings, 1 reply; 3+ messages in thread From: Arvind Yadav @ 2017-05-19 10:50 UTC (permalink / raw) To: linux-arm-kernel clk_prepare_enable() can fail here and we must check its return value. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> --- drivers/devfreq/event/exynos-nocp.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/devfreq/event/exynos-nocp.c b/drivers/devfreq/event/exynos-nocp.c index 5c3e7b1..f6e7956 100644 --- a/drivers/devfreq/event/exynos-nocp.c +++ b/drivers/devfreq/event/exynos-nocp.c @@ -267,7 +267,11 @@ static int exynos_nocp_probe(struct platform_device *pdev) } platform_set_drvdata(pdev, nocp); - clk_prepare_enable(nocp->clk); + ret = clk_prepare_enable(nocp->clk); + if (ret) { + dev_err(&pdev->dev, "failed to prepare ppmu clock\n"); + return ret; + } pr_info("exynos-nocp: new NoC Probe device registered: %s\n", dev_name(dev)); -- 1.9.1 ^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH v1] PM / devfreq: exynos-nocp : Handle return value of clk_prepare_enable 2017-05-19 10:50 ` [PATCH v1] PM / devfreq: exynos-nocp : Handle return value of clk_prepare_enable Arvind Yadav @ 2017-05-23 9:43 ` Chanwoo Choi 2017-05-24 1:56 ` Chanwoo Choi 0 siblings, 1 reply; 3+ messages in thread From: Chanwoo Choi @ 2017-05-23 9:43 UTC (permalink / raw) To: linux-arm-kernel Hi Arvind, On 2017? 05? 19? 19:50, Arvind Yadav wrote: > clk_prepare_enable() can fail here and we must check its return value. > > Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> > --- > drivers/devfreq/event/exynos-nocp.c | 6 +++++- > 1 file changed, 5 insertions(+), 1 deletion(-) > > diff --git a/drivers/devfreq/event/exynos-nocp.c b/drivers/devfreq/event/exynos-nocp.c > index 5c3e7b1..f6e7956 100644 > --- a/drivers/devfreq/event/exynos-nocp.c > +++ b/drivers/devfreq/event/exynos-nocp.c > @@ -267,7 +267,11 @@ static int exynos_nocp_probe(struct platform_device *pdev) > } > platform_set_drvdata(pdev, nocp); > > - clk_prepare_enable(nocp->clk); > + ret = clk_prepare_enable(nocp->clk); > + if (ret) { > + dev_err(&pdev->dev, "failed to prepare ppmu clock\n"); > + return ret; > + } I already replied from the similar patch. Thanks. > > pr_info("exynos-nocp: new NoC Probe device registered: %s\n", > dev_name(dev)); > -- Best Regards, Chanwoo Choi Samsung Electronics ^ permalink raw reply [flat|nested] 3+ messages in thread
* [PATCH v1] PM / devfreq: exynos-nocp : Handle return value of clk_prepare_enable 2017-05-23 9:43 ` Chanwoo Choi @ 2017-05-24 1:56 ` Chanwoo Choi 0 siblings, 0 replies; 3+ messages in thread From: Chanwoo Choi @ 2017-05-24 1:56 UTC (permalink / raw) To: linux-arm-kernel On 2017? 05? 23? 18:43, Chanwoo Choi wrote: > Hi Arvind, > > On 2017? 05? 19? 19:50, Arvind Yadav wrote: >> clk_prepare_enable() can fail here and we must check its return value. >> >> Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> >> --- >> drivers/devfreq/event/exynos-nocp.c | 6 +++++- >> 1 file changed, 5 insertions(+), 1 deletion(-) >> >> diff --git a/drivers/devfreq/event/exynos-nocp.c b/drivers/devfreq/event/exynos-nocp.c >> index 5c3e7b1..f6e7956 100644 >> --- a/drivers/devfreq/event/exynos-nocp.c >> +++ b/drivers/devfreq/event/exynos-nocp.c >> @@ -267,7 +267,11 @@ static int exynos_nocp_probe(struct platform_device *pdev) >> } >> platform_set_drvdata(pdev, nocp); >> >> - clk_prepare_enable(nocp->clk); >> + ret = clk_prepare_enable(nocp->clk); >> + if (ret) { >> + dev_err(&pdev->dev, "failed to prepare ppmu clock\n"); >> + return ret; >> + } > > I already replied from the similar patch. Thanks. > >> >> pr_info("exynos-nocp: new NoC Probe device registered: %s\n", >> dev_name(dev)); >> > > I'm missing some point that if there is no clock this driver initializes 'nocp->clk = NULL;' on 217 line. Looks good to me. Acked-by: Chanwoo Choi <cw00.choi@samsung.com> -- Best Regards, Chanwoo Choi Samsung Electronics ^ permalink raw reply [flat|nested] 3+ messages in thread
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2017-05-19 10:50 ` [PATCH v1] PM / devfreq: exynos-nocp : Handle return value of clk_prepare_enable Arvind Yadav
2017-05-23 9:43 ` Chanwoo Choi
2017-05-24 1:56 ` Chanwoo Choi
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