On 9/15/20 11:00 AM, Chanwoo Choi wrote: > Hi Dmitry, > > On 9/14/20 10:56 PM, Dmitry Osipenko wrote: >> 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 <dan.carpenter@xxxxxxxxxx> >>>> --- >>>> --- >>>> 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. > > Do you mean that reset is deasserted automatically > when invoke clk_round_rate() on tegra? > > If tree, I think that 'reset_control_reset(tegra->reset)' invocation I'm sorry for my typo. s/tree/true. > is not needed on 'remove_opp:' goto. Because already reset deassertion > is invoked by clk_round_rate(), it seems that doesn't need to invoke > anymore during exception case. > > Actually, it is not clear in my case. > -- Best Regards, Chanwoo Choi Samsung Electronics