linux-kernel - Re: [PATCH v4 1/5] dell-laptop: move dell_smi

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Date:	Mon, 29 Feb 2016 13:52:14 +0100
From:	Pali Rohár <pali.rohar@...il.com>
To:	Michał Kępień <kernel@...pniu.pl>,
	Darren Hart <dvhart@...radead.org>
Cc:	Matthew Garrett <mjg59@...f.ucam.org>,
	Darek Stojaczyk <darek.stojaczyk@...il.com>,
	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/5] dell-laptop: move dell_smi_error() to dell-smbios

On Wednesday 24 February 2016 08:20:11 Michał Kępień wrote:
> The dell_smi_error() method could be used by modules other than
> dell-laptop for convenient translation of SMBIOS request errors into
> errno values.  Thus, move it to dell-smbios.
> 
> Signed-off-by: Michał Kępień <kernel@...pniu.pl>
> ---
>  drivers/platform/x86/dell-laptop.c |   14 --------------
>  drivers/platform/x86/dell-smbios.c |   16 ++++++++++++++++
>  drivers/platform/x86/dell-smbios.h |    2 ++
>  3 files changed, 18 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c
> index 76064c8..cbafb95 100644
> --- a/drivers/platform/x86/dell-laptop.c
> +++ b/drivers/platform/x86/dell-laptop.c
> @@ -273,20 +273,6 @@ static const struct dmi_system_id dell_quirks[] __initconst = {
>  	{ }
>  };
>  
> -static inline int dell_smi_error(int value)
> -{
> -	switch (value) {
> -	case 0: /* Completed successfully */
> -		return 0;
> -	case -1: /* Completed with error */
> -		return -EIO;
> -	case -2: /* Function not supported */
> -		return -ENXIO;
> -	default: /* Unknown error */
> -		return -EINVAL;
> -	}
> -}
> -
>  /*
>   * Derived from information in smbios-wireless-ctl:
>   *
> diff --git a/drivers/platform/x86/dell-smbios.c b/drivers/platform/x86/dell-smbios.c
> index 2a4992a..942572f 100644
> --- a/drivers/platform/x86/dell-smbios.c
> +++ b/drivers/platform/x86/dell-smbios.c
> @@ -16,6 +16,7 @@
>  #include <linux/kernel.h>
>  #include <linux/module.h>
>  #include <linux/dmi.h>
> +#include <linux/err.h>
>  #include <linux/gfp.h>
>  #include <linux/mutex.h>
>  #include <linux/slab.h>
> @@ -39,6 +40,21 @@ static int da_command_code;
>  static int da_num_tokens;
>  static struct calling_interface_token *da_tokens;
>  
> +int dell_smi_error(int value)
> +{
> +	switch (value) {
> +	case 0: /* Completed successfully */
> +		return 0;
> +	case -1: /* Completed with error */
> +		return -EIO;
> +	case -2: /* Function not supported */
> +		return -ENXIO;
> +	default: /* Unknown error */
> +		return -EINVAL;
> +	}
> +}
> +EXPORT_SYMBOL_GPL(dell_smi_error);
> +
>  struct calling_interface_buffer *dell_smbios_get_buffer(void)
>  {
>  	mutex_lock(&buffer_mutex);
> diff --git a/drivers/platform/x86/dell-smbios.h b/drivers/platform/x86/dell-smbios.h
> index 4f69b16..52febe6 100644
> --- a/drivers/platform/x86/dell-smbios.h
> +++ b/drivers/platform/x86/dell-smbios.h
> @@ -35,6 +35,8 @@ struct calling_interface_token {
>  	};
>  };
>  
> +int dell_smi_error(int value);
> +
>  struct calling_interface_buffer *dell_smbios_get_buffer(void);
>  void dell_smbios_clear_buffer(void);
>  void dell_smbios_release_buffer(void);

And... here what about inline vs EXPORT_SYMBOL function? Just asking...

-- 
Pali Rohár
pali.rohar@...il.com