On Sun, Jan 3, 2021 at 12:58 PM Yangtao Li <tiny.windzz@xxxxxxxxx> wrote:
>
> Use devm_pm_opp_* API to simplify code.
>
> Signed-off-by: Yangtao Li <tiny.windzz@xxxxxxxxx>
> ---
> drivers/devfreq/imx8m-ddrc.c | 15 ++-------------
> 1 file changed, 2 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/devfreq/imx8m-ddrc.c b/drivers/devfreq/imx8m-ddrc.c
> index bc82d3653bff..9383d6e5538b 100644
> --- a/drivers/devfreq/imx8m-ddrc.c
> +++ b/drivers/devfreq/imx8m-ddrc.c
> @@ -370,11 +370,6 @@ static int imx8m_ddrc_check_opps(struct device *dev)
> return 0;
> }
>
> -static void imx8m_ddrc_exit(struct device *dev)
> -{
> - dev_pm_opp_of_remove_table(dev);
> -}
> -
> static int imx8m_ddrc_probe(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> @@ -419,7 +414,7 @@ static int imx8m_ddrc_probe(struct platform_device *pdev)
> return ret;
> }
>
> - ret = dev_pm_opp_of_add_table(dev);
> + ret = devm_pm_opp_of_add_table(dev);
> if (ret < 0) {
> dev_err(dev, "failed to get OPP table\n");
> return ret;
> @@ -427,12 +422,11 @@ static int imx8m_ddrc_probe(struct platform_device *pdev)
>
> ret = imx8m_ddrc_check_opps(dev);
> if (ret < 0)
> - goto err;
> + return ret;
>
> priv->profile.polling_ms = 1000;
> priv->profile.target = imx8m_ddrc_target;
> priv->profile.get_dev_status = imx8m_ddrc_get_dev_status;
> - priv->profile.exit = imx8m_ddrc_exit;
> priv->profile.get_cur_freq = imx8m_ddrc_get_cur_freq;
> priv->profile.initial_freq = clk_get_rate(priv->dram_core);
>
> @@ -441,13 +435,8 @@ static int imx8m_ddrc_probe(struct platform_device *pdev)
> if (IS_ERR(priv->devfreq)) {
> ret = PTR_ERR(priv->devfreq);
> dev_err(dev, "failed to add devfreq device: %d\n", ret);
> - goto err;
> }
>
> - return 0;
> -
> -err:
> - dev_pm_opp_of_remove_table(dev);
> return ret;
devm_devfreq_add_device() doesn't return any integer value.
Even if devm_devfreq_add_device() returns the right devfreq instance,
the 'ret' value is not the return value of devm_devfreq_add_device().
On this patch, 'ret' value of 'return ret' is from imx8m_ddrc_check_opps().
Surely, it is well working with this modification. But, it is not code
for exception handling.
So, we need to remain the following codes:
return 0;
err:
return ret;
> }
>
> --
> 2.25.1
>
--
Best Regards,
Chanwoo Choi
