linux-kernel - Re: [PATCH] soundwire: intel: fix CONFIG_PM and CONFIG_PM

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Date:   Fri, 21 Aug 2020 10:31:59 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Bard Liao <yung-chuan.liao@...ux.intel.com>
Cc:     alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        tiwai@...e.de, broonie@...nel.org, gregkh@...uxfoundation.org,
        jank@...ence.com, srinivas.kandagatla@...aro.org,
        rander.wang@...ux.intel.com, ranjani.sridharan@...ux.intel.com,
        hui.wang@...onical.com, pierre-louis.bossart@...ux.intel.com,
        sanyog.r.kale@...el.com, mengdong.lin@...el.com,
        bard.liao@...el.com
Subject: Re: [PATCH] soundwire: intel: fix CONFIG_PM and CONFIG_PM_SLEEP
 confusion

On 20-08-20, 22:04, Bard Liao wrote:
> From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
> 
> When CONFIG_PM_SLEEP is not defined, GCC throws compilation warnings:
> 
> drivers/soundwire/intel.c:1816:12: warning: ‘intel_resume’ defined but
> not used [-Wunused-function]
>  1816 | static int intel_resume(struct device *dev)
>       |            ^~~~~~~~~~~~
> 
> drivers/soundwire/intel.c:1697:12: warning: ‘intel_suspend’ defined
> but not used [-Wunused-function]
>  1697 | static int intel_suspend(struct device *dev)
> 
> Fix by adding the missing CONFIG_PM_SLEEP.

Can you rather use __maybe for for these rather than wrapping in another
ifdef, that is the recommended way to do this

Thanks

> Note that we could move code around and use only 2 ifdefs, but this
> will generate conflicts so let's do this when all the pm handling is
> merged.
> 
> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
> Signed-off-by: Bard Liao <yung-chuan.liao@...ux.intel.com>
> ---
>  drivers/soundwire/intel.c | 12 ++++++++++--
>  1 file changed, 10 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
> index dbcbe2708563..a2f0026cb2c1 100644
> --- a/drivers/soundwire/intel.c
> +++ b/drivers/soundwire/intel.c
> @@ -1525,7 +1525,7 @@ int intel_master_process_wakeen_event(struct platform_device *pdev)
>   * PM calls
>   */
>  
> -#ifdef CONFIG_PM
> +#ifdef CONFIG_PM_SLEEP
>  
>  static int intel_suspend(struct device *dev)
>  {
> @@ -1562,6 +1562,9 @@ static int intel_suspend(struct device *dev)
>  
>  	return 0;
>  }
> +#endif
> +
> +#ifdef CONFIG_PM
>  
>  static int intel_suspend_runtime(struct device *dev)
>  {
> @@ -1624,6 +1627,9 @@ static int intel_suspend_runtime(struct device *dev)
>  
>  	return ret;
>  }
> +#endif
> +
> +#ifdef CONFIG_PM_SLEEP
>  
>  static int intel_resume(struct device *dev)
>  {
> @@ -1691,6 +1697,9 @@ static int intel_resume(struct device *dev)
>  
>  	return ret;
>  }
> +#endif
> +
> +#ifdef CONFIG_PM
>  
>  static int intel_resume_runtime(struct device *dev)
>  {
> @@ -1797,7 +1806,6 @@ static int intel_resume_runtime(struct device *dev)
>  
>  	return ret;
>  }
> -
>  #endif
>  
>  static const struct dev_pm_ops intel_pm = {
> -- 
> 2.17.1

-- 
~Vinod