Re: [PATCH v4 15/37] PM / devfreq: tegra30: Add error messages to tegra_devfreq_target()

Chanwoo Choi
2020-07-02T01:01:29Z

On 6/9/20 10:13 PM, Dmitry Osipenko wrote:
> It's useful to now when something goes wrong instead of failing silently,
> so let's add error messages to tegra_devfreq_target() to prevent situation
> where it fails silently.
>
> Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
> ---
> drivers/devfreq/tegra30-devfreq.c | 8 ++++++--
> 1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c
> index 13f93c6038ab..a03fb16c5c4c 100644
> --- a/drivers/devfreq/tegra30-devfreq.c
> +++ b/drivers/devfreq/tegra30-devfreq.c
> @@ -641,12 +641,16 @@ static int tegra_devfreq_target(struct device *dev, unsigned long *freq,
> dev_pm_opp_put(opp);
>
> err = clk_set_min_rate(tegra->emc_clock, rate * KHZ);
> - if (err)
> + if (err) {
> + dev_err(dev, "Failed to set min rate: %d\n", err);
> return err;
> + }
>
> err = clk_set_rate(tegra->emc_clock, 0);
> - if (err)
> + if (err) {
> + dev_err(dev, "Failed to set rate: %d\n", err);
> goto restore_min_rate;
> + }
>
> return 0;
>
>

Acked-by: Chanwoo Choi <cw00.choi@samsung.com>

--
Best Regards,
Chanwoo Choi
Samsung Electronics