linux-kernel - Re: [PATCH] soc: sunxi: select CONFIG

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Date:   Mon, 30 Jan 2023 22:18:23 +0100
From:   Jernej Škrabec <jernej.skrabec@...il.com>
To:     Chen-Yu Tsai <wens@...e.org>, Samuel Holland <samuel@...lland.org>,
        Arnd Bergmann <arnd@...nel.org>
Cc:     Arnd Bergmann <arnd@...db.de>,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] soc: sunxi: select CONFIG_PM

Dne ponedeljek, 30. januar 2023 ob 14:04:47 CET je Arnd Bergmann napisal(a):
> From: Arnd Bergmann <arnd@...db.de>
> 
> Selecting CONFIG_PM_GENERIC_DOMAINS without CONFIG_PM leads to a
> build failure:
> 
> WARNING: unmet direct dependencies detected for PM_GENERIC_DOMAINS
>   Depends on [n]: PM [=n]
>   Selected by [y]:
>   - SUN20I_PPU [=y] && (ARCH_SUNXI [=n] || COMPILE_TEST [=y])
> 
> drivers/base/power/domain_governor.c: In function 'default_suspend_ok':
> drivers/base/power/domain_governor.c:85:24: error: 'struct dev_pm_info' has
> no member named 'ignore_children' 85 |         if
> (!dev->power.ignore_children)
> 
>       |                        ^
> 
> drivers/base/power/domain.c: In function 'genpd_queue_power_off_work':
> drivers/base/power/domain.c:657:20: error: 'pm_wq' undeclared (first use in
> this function) 657 |         queue_work(pm_wq, &genpd->power_off_work);
> 
>       |                    ^~~~~
> 
> Unfortunately platforms are inconsistent between using 'select PM'
> and 'depends on PM' here. CONFIG_PM is a user-visible symbol, so
> in principle we should be using 'depends on', but on the other hand
> using 'select' here is more common among drivers/soc. Go with the
> majority for now, as this has a smaller risk of introducing circular
> dependencies. We may need to clean this up for consistency later.
> 
> Fixes: 0e30ca5ab0a8 ("soc: sunxi: Add Allwinner D1 PPU driver")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Acked-by: Jernej Skrabec <jernej.skrabec@...il.com>

Although, would it be better if commit in question is fixed and another PR is 
issued? That way we can avoid issue with broken config.

Best regards,
Jernej