On Wed, Nov 11, 2020 at 09:51:15AM +0100, Krzysztof Kozlowski wrote:
> On Wed, Nov 11, 2020 at 04:14:40AM +0300, Dmitry Osipenko wrote:
> > Factor out clk initialization and make it resource-managed. This makes
> > easier to follow code and will help to make further changes cleaner.
> > 
> > Signed-off-by: Dmitry Osipenko <dig...@gmail.com>
> > ---
> >  drivers/memory/tegra/tegra30-emc.c | 70 ++++++++++++++++++++----------
> >  1 file changed, 47 insertions(+), 23 deletions(-)
> > 
> > diff --git a/drivers/memory/tegra/tegra30-emc.c 
> > b/drivers/memory/tegra/tegra30-emc.c
> > index d27df842a667..1df42e212d73 100644
> > --- a/drivers/memory/tegra/tegra30-emc.c
> > +++ b/drivers/memory/tegra/tegra30-emc.c
> > @@ -1550,6 +1550,49 @@ static int tegra_emc_opp_table_init(struct tegra_emc 
> > *emc)
> >     return err;
> >  }
> >  
> > +static void devm_tegra_emc_unset_callback(void *data)
> > +{
> > +   tegra20_clk_set_emc_round_callback(NULL, NULL);
> > +}
> > +
> > +static void devm_tegra_emc_unreg_clk_notifier(void *data)
> > +{
> > +   struct tegra_emc *emc = data;
> > +
> > +   clk_notifier_unregister(emc->clk, &emc->clk_nb);
> > +}
> > +
> > +static int tegra_emc_init_clk(struct tegra_emc *emc)
> > +{
> > +   int err;
> > +
> > +   tegra20_clk_set_emc_round_callback(emc_round_rate, emc);
> > +
> > +   err = devm_add_action_or_reset(emc->dev, devm_tegra_emc_unset_callback,
> > +                                  NULL);
> > +   if (err)
> > +           return err;
> > +
> > +   emc->clk = devm_clk_get(emc->dev, NULL);
> > +   if (IS_ERR(emc->clk)) {
> > +           dev_err(emc->dev, "failed to get EMC clock: %pe\n", emc->clk);
> > +           return PTR_ERR(emc->clk);
> > +   }
> > +
> > +   err = clk_notifier_register(emc->clk, &emc->clk_nb);
> > +   if (err) {
> > +           dev_err(emc->dev, "failed to register clk notifier: %d\n", err);
> > +           return err;
> > +   }
> > +
> > +   err = devm_add_action_or_reset(emc->dev,
> > +                                  devm_tegra_emc_unreg_clk_notifier, emc);
> > +   if (err)
> > +           return err;
> > +
> > +   return 0;
> > +}
> > +
> >  static int tegra_emc_probe(struct platform_device *pdev)
> >  {
> >     struct device_node *np;
> > @@ -1599,25 +1642,13 @@ static int tegra_emc_probe(struct platform_device 
> > *pdev)
> >             return err;
> >     }
> >  
> > -   tegra20_clk_set_emc_round_callback(emc_round_rate, emc);
> > -
> > -   emc->clk = devm_clk_get(&pdev->dev, "emc");
> > -   if (IS_ERR(emc->clk)) {
> > -           err = PTR_ERR(emc->clk);
> > -           dev_err(&pdev->dev, "failed to get emc clock: %d\n", err);
> > -           goto unset_cb;
> > -   }
> > -
> > -   err = clk_notifier_register(emc->clk, &emc->clk_nb);
> > -   if (err) {
> > -           dev_err(&pdev->dev, "failed to register clk notifier: %d\n",
> > -                   err);
> > -           goto unset_cb;
> > -   }
> > +   err = tegra_emc_init_clk(emc);
> > +   if (err)
> > +           return err;
> >  
> >     err = tegra_emc_opp_table_init(emc);
> >     if (err)
> > -           goto unreg_notifier;
> > +           return err;
> >  
> >     platform_set_drvdata(pdev, emc);
> >     tegra_emc_rate_requests_init(emc);
> > @@ -1632,13 +1663,6 @@ static int tegra_emc_probe(struct platform_device 
> > *pdev)
> >     try_module_get(THIS_MODULE);
> >  
> >     return 0;
> > -
> > -unreg_notifier:
> > -   clk_notifier_unregister(emc->clk, &emc->clk_nb);
> 
> You added this code in patch #8, so adding-and-removing a piece of code

Correction: you added this in patch #9.

Best regards,
Krzysztof


> is a nice hint that this patch should be before. Don't add new code
> which later you simplify. Move all bugfixes and all simplifications to
> beginning of patchset.
> 
> That's quite similar case to v6 where you put bugfixes in the middle
> of patchset.
> 
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