linux-kernel - Re: [PATCH] usb: phy: msm: fix compilation errors when !CONFIG_PM

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Date:	Fri, 17 Jan 2014 09:54:09 -0800
From:	Kevin Hilman <khilman@...aro.org>
To:	Josh Cartwright <joshc@...eaurora.org>
Cc:	Felipe Balbi <balbi@...com>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org,
	linux-arm-msm@...r.kernel.org,
	"Ivan T. Ivanov" <iivanov@...sol.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: phy: msm: fix compilation errors when !CONFIG_PM_SLEEP

Josh Cartwright <joshc@...eaurora.org> writes:

> Both the PM_RUNTIME and PM_SLEEP callbacks call into the common
> msm_otg_{suspend,resume} routines, however these routines are only being
> built when CONFIG_PM_SLEEP.  In addition, msm_otg_{suspend,resume} also
> depends on msm_hsusb_config_vddcx(), which is only built when
> CONFIG_PM_SLEEP.
>
> Fix the CONFIG_PM_RUNTIME, !CONFIG_PM_SLEEP case by changing the
> preprocessor conditional, and moving msm_hsusb_config_vddcx().
>
> While we're here, eliminate the CONFIG_PM conditional for setting
> up the dev_pm_ops.
>
> This address the following errors Russell King has hit doing randconfig
> builds:
>
> drivers/usb/phy/phy-msm-usb.c: In function 'msm_otg_runtime_suspend':
> drivers/usb/phy/phy-msm-usb.c:1691:2: error: implicit declaration of function 'msm_otg_suspend'
> drivers/usb/phy/phy-msm-usb.c: In function 'msm_otg_runtime_resume':
> drivers/usb/phy/phy-msm-usb.c:1699:2: error: implicit declaration of function 'msm_otg_resume'
>
> Cc: Ivan T. Ivanov <iivanov@...sol.com>
> Reported-by: Russell King <rmk+kernel@....linux.org.uk>
> Signed-off-by: Josh Cartwright <joshc@...eaurora.org>

[...]

> @@ -440,7 +414,32 @@ static int msm_otg_reset(struct usb_phy *phy)
>  #define PHY_SUSPEND_TIMEOUT_USEC	(500 * 1000)
>  #define PHY_RESUME_TIMEOUT_USEC	(100 * 1000)
>  
> -#ifdef CONFIG_PM_SLEEP
> +#if defined(CONFIG_PM_SLEEP) || defined(CONFIG_PM_RUNTIME)

nit: you should just use CONFIG_PM here since that is what it's for.

c.f. kernel/power/Kconfig:

config PM
        def_bool y
        depends on PM_SLEEP || PM_RUNTIME

Kevin
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