linux-kernel - Re: [PATCH] clk: shmobile: r8a7779: check return of of_property_read_string

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Date:	Thu, 2 Apr 2015 00:12:03 +0000
From:	Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
CC:	Stephen Boyd <sboyd@...eaurora.org>,
	Mike Turquette <mturquette@...aro.org>,
	Simon Horman <horms+renesas@...ge.net.au>,
	Linux-SH <linux-sh@...r.kernel.org>,
	Linux-Kernel <linux-kernel@...r.kernel.org>,
	Laurent <laurent.pinchart@...asonboard.com>
Subject: Re: [PATCH] clk: shmobile: r8a7779: check return of of_property_read_string_index()


Hi Geert

> > diff --git a/drivers/clk/shmobile/clk-r8a7779.c b/drivers/clk/shmobile/clk-r8a7779.c
> > index 652ecac..af439b2 100644
> > --- a/drivers/clk/shmobile/clk-r8a7779.c
> > +++ b/drivers/clk/shmobile/clk-r8a7779.c
> > @@ -155,8 +155,10 @@ static void __init r8a7779_cpg_clocks_init(struct device_node *np)
> >                 const char *name;
> >                 struct clk *clk;
> >
> > -               of_property_read_string_index(np, "clock-output-names", i,
> > -                                             &name);
> > +               if (of_property_read_string_index(np, "clock-output-names", i,
> > +                                                 &name))
> > +                       pr_err("%s: can't get clock-output-names (%d)\n",
> > +                              __func__, i);
> 
> Shouldn't you add a "continue;" here, too?
> 
> Anyway, I don't think this can fail, as
> i < of_property_count_strings(np, "clock-output-names");

Hmm.. indeed.
Thank you for your review, please drop this patch.

Best regards
---
Kuninori Morimoto
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