linux-kernel - Re: [PATCH] i2c-designware: define i2c_dw_pci_runtime

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Date:	Fri, 27 Sep 2013 04:43:13 +0200
From:	Wolfram Sang <wsa@...-dreams.de>
To:	Vincent Stehlé <vincent.stehle@...oste.net>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] i2c-designware: define i2c_dw_pci_runtime_idle only with
 runtime pm

On Fri, Sep 27, 2013 at 12:24:03AM +0200, Vincent Stehlé wrote:
> Make sure i2c_dw_pci_runtime_idle() is defined only when actually used, when
> CONFIG_PM_RUNTIME is defined.
> 
> This fixes the following compilation warning:
> 
>  drivers/i2c/busses/i2c-designware-pcidrv.c:188:12: warning: ‘i2c_dw_pci_runtime_idle’ defined but not used [-Wunused-function]
> 
> Signed-off-by: Vincent Stehlé <vincent.stehle@...oste.net>
> Cc: Wolfram Sang <wsa@...-dreams.de>

I wonder if this fix is complete? Mika?

> ---
>  drivers/i2c/busses/i2c-designware-pcidrv.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c
> index f6ed06c..2b5d3a6 100644
> --- a/drivers/i2c/busses/i2c-designware-pcidrv.c
> +++ b/drivers/i2c/busses/i2c-designware-pcidrv.c
> @@ -185,6 +185,7 @@ static int i2c_dw_pci_resume(struct device *dev)
>  	return 0;
>  }
>  
> +#ifdef CONFIG_PM_RUNTIME
>  static int i2c_dw_pci_runtime_idle(struct device *dev)
>  {
>  	int err = pm_schedule_suspend(dev, 500);
> @@ -194,6 +195,7 @@ static int i2c_dw_pci_runtime_idle(struct device *dev)
>  		return 0;
>  	return -EBUSY;
>  }
> +#endif
>  
>  static const struct dev_pm_ops i2c_dw_pm_ops = {

Shouldn't this be using UNIVERSAL_DEV_PM_OPS with the suspend and resume
function #ifdeffed by CONFIG_PM_SLEEP?

>  	.resume         = i2c_dw_pci_resume,
> -- 
> 1.8.4.rc3
> 

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