From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Osipenko Date: Mon, 14 Sep 2020 13:56:26 +0000 Subject: Re: [PATCH] PM / devfreq: tegra30: disable clock on error in probe Message-Id: <44560522-f04e-ade5-2e02-9df56a6f79ba@gmail.com> List-Id: References: <20200908072557.GC294938@mwanda> <2ceb045a-ebac-58d7-0250-4ea39d711ce8@samsung.com> In-Reply-To: <2ceb045a-ebac-58d7-0250-4ea39d711ce8@samsung.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit To: Chanwoo Choi , Dan Carpenter Cc: MyungJoo Ham , Kyungmin Park , Thierry Reding , Jonathan Hunter , linux-pm@vger.kernel.org, linux-tegra@vger.kernel.org, kernel-janitors@vger.kernel.org 14.09.2020 10:09, Chanwoo Choi пишет: > Hi, > > On 9/8/20 4:25 PM, Dan Carpenter wrote: >> This error path needs to call clk_disable_unprepare(). >> >> Fixes: 7296443b900e ("PM / devfreq: tegra30: Handle possible round-rate error") >> Signed-off-by: Dan Carpenter >> --- >> --- >> drivers/devfreq/tegra30-devfreq.c | 4 +++- >> 1 file changed, 3 insertions(+), 1 deletion(-) >> >> diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c >> index e94a27804c20..dedd39de7367 100644 >> --- a/drivers/devfreq/tegra30-devfreq.c >> +++ b/drivers/devfreq/tegra30-devfreq.c >> @@ -836,7 +836,8 @@ static int tegra_devfreq_probe(struct platform_device *pdev) >> rate = clk_round_rate(tegra->emc_clock, ULONG_MAX); >> if (rate < 0) { >> dev_err(&pdev->dev, "Failed to round clock rate: %ld\n", rate); >> - return rate; >> + err = rate; >> + goto disable_clk; >> } >> >> tegra->max_freq = rate / KHZ; >> @@ -897,6 +898,7 @@ static int tegra_devfreq_probe(struct platform_device *pdev) >> dev_pm_opp_remove_all_dynamic(&pdev->dev); >> >> reset_control_reset(tegra->reset); >> +disable_clk: >> clk_disable_unprepare(tegra->clock); > > Is it doesn't need to reset with reset_contrl_reset()? Hello, Chanwoo! It's reset just before the clk_round_rate() invocation, hence there shouldn't be a need to reset it second time.