linux-kernel - Re: [PATCH] soc/tegra: fix link errors with PMC disabled

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Message-ID: <20170320111046.GA20431@ulmo.ba.sec>
Date:   Mon, 20 Mar 2017 12:10:46 +0100
From:   Thierry Reding <thierry.reding@...il.com>
To:     Jon Hunter <jonathanh@...dia.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Laxman Dewangan <ldewangan@...dia.com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] soc/tegra: fix link errors with PMC disabled

On Mon, Mar 20, 2017 at 09:47:39AM +0000, Jon Hunter wrote:
> Hi Arnd,
> 
> On 20/03/17 09:13, Arnd Bergmann wrote:
> > With the new Tegra186 PMC driver merged, anything that relies on the previous
> > PMC driver fails to link when that is disabled:
> > 
> > arch/arm/mach-tegra/pm.o: In function `tegra_pm_set':
> > pm.c:(.text.tegra_pm_set+0x3c): undefined reference to `tegra_pmc_enter_suspend_mode'
> > arch/arm/mach-tegra/pm.o: In function `tegra_suspend_enter':
> > pm.c:(.text.tegra_suspend_enter+0x4): undefined reference to `tegra_pmc_get_suspend_mode'
> > arch/arm/mach-tegra/pm.o: In function `tegra_init_suspend':
> > pm.c:(.init.text+0x1c): undefined reference to `tegra_pmc_get_suspend_mode'
> > pm.c:(.init.text+0x74): undefined reference to `tegra_pmc_set_suspend_mode'
> > 
> > ERROR: tegra_powergate_sequence_power_up [drivers/ata/ahci_tegra.ko] undefined!
> > ERROR: tegra_powergate_power_off [drivers/ata/ahci_tegra.ko] undefined!
> > 
> > Making the definition depend on the presence of the driver makes it build
> > again, though that might not be the correct fix.
> > 
> > Fixes: 854014236290 ("soc/tegra: Implement Tegra186 PMC support")
> > Signed-off-by: Arnd Bergmann <arnd@...db.de>
> 
> A fix was also submitted by Krzysztof [0].
> 
> Thierry, what's your preference? Maybe Arnd's approach is better.

Yes, I prefer Arnd's patch because it is more consistent with how we
deal with this kind of dependency elsewhere.

Thierry

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