From mboxrd@z Thu Jan 1 00:00:00 1970 From: Viresh Kumar Subject: Re: [PATCH v3] cpufreq: kirkwood-cpufreq:- Handle return value of clk_prepare_enable Date: Wed, 17 May 2017 12:44:03 +0530 Message-ID: <20170517071403.GD17481@vireshk-i7> References: <1495003835-25828-1-git-send-email-arvind.yadav.cs@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail-pf0-f169.google.com ([209.85.192.169]:34578 "EHLO mail-pf0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753465AbdEQHOG (ORCPT ); Wed, 17 May 2017 03:14:06 -0400 Received: by mail-pf0-f169.google.com with SMTP id 9so2913270pfj.1 for ; Wed, 17 May 2017 00:14:06 -0700 (PDT) Content-Disposition: inline In-Reply-To: <1495003835-25828-1-git-send-email-arvind.yadav.cs@gmail.com> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Arvind Yadav Cc: rjw@rjwysocki.net, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org On 17-05-17, 12:20, Arvind Yadav wrote: > clk_prepare_enable() can fail here and we must check its return value. > > Signed-off-by: Arvind Yadav > --- > drivers/cpufreq/kirkwood-cpufreq.c | 19 ++++++++++++++++--- > 1 file changed, 16 insertions(+), 3 deletions(-) > > diff --git a/drivers/cpufreq/kirkwood-cpufreq.c b/drivers/cpufreq/kirkwood-cpufreq.c > index 1b9bcd7..c2dd43f 100644 > --- a/drivers/cpufreq/kirkwood-cpufreq.c > +++ b/drivers/cpufreq/kirkwood-cpufreq.c > @@ -127,7 +127,12 @@ static int kirkwood_cpufreq_probe(struct platform_device *pdev) > return PTR_ERR(priv.cpu_clk); > } > > - clk_prepare_enable(priv.cpu_clk); > + err = clk_prepare_enable(priv.cpu_clk); > + if (err) { > + dev_err(priv.dev, "Unable to prepare cpuclk\n"); > + return err; > + } > + > kirkwood_freq_table[0].frequency = clk_get_rate(priv.cpu_clk) / 1000; > > priv.ddr_clk = of_clk_get_by_name(np, "ddrclk"); > @@ -137,7 +142,11 @@ static int kirkwood_cpufreq_probe(struct platform_device *pdev) > goto out_cpu; > } > > - clk_prepare_enable(priv.ddr_clk); > + err = clk_prepare_enable(priv.ddr_clk); > + if (err) { > + dev_err(priv.dev, "Unable to prepare ddrclk\n"); > + goto out_cpu; > + } > kirkwood_freq_table[1].frequency = clk_get_rate(priv.ddr_clk) / 1000; > > priv.powersave_clk = of_clk_get_by_name(np, "powersave"); > @@ -146,7 +155,11 @@ static int kirkwood_cpufreq_probe(struct platform_device *pdev) > err = PTR_ERR(priv.powersave_clk); > goto out_ddr; > } > - clk_prepare_enable(priv.powersave_clk); > + err = clk_prepare_enable(priv.powersave_clk); > + if (err) { > + dev_err(priv.dev, "Unable to prepare powersave clk\n"); > + goto out_ddr; > + } > > of_node_put(np); > np = NULL; Acked-by: Viresh Kumar -- viresh