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

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Date:   Mon, 20 Mar 2017 09:47:39 +0000
From:   Jon Hunter <jonathanh@...dia.com>
To:     Arnd Bergmann <arnd@...db.de>,
        Thierry Reding <thierry.reding@...il.com>
CC:     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

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.

Jon

[0] http://marc.info/?l=linux-arm-kernel&m=148926404419311&w=2

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