linux-kernel - Re: [PATCH] platform/x86: mlx-platform: remove an unused variable

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Date:   Mon, 7 Dec 2020 14:53:37 +0100
From:   Hans de Goede <hdegoede@...hat.com>
To:     Arnd Bergmann <arnd@...nel.org>,
        Vadim Pasternak <vadimp@...dia.com>,
        Mark Gross <mgross@...ux.intel.com>,
        Nathan Chancellor <natechancellor@...il.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Michael Shych <michaelsh@...lanox.com>,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        clang-built-linux@...glegroups.com
Subject: Re: [PATCH] platform/x86: mlx-platform: remove an unused variable

Hi,

On 12/3/20 11:30 PM, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> The only reference to the mlxplat_mlxcpld_psu[] array got removed,
> so there is now a warning from clang:
> 
> drivers/platform/x86/mlx-platform.c:322:30: error: variable 'mlxplat_mlxcpld_psu' is not needed and will not be emitted [-Werror,-Wunneeded-internal-declaration]
> static struct i2c_board_info mlxplat_mlxcpld_psu[] = {
> 
> Remove the array as well and adapt the ARRAY_SIZE() call
> accordingly.
> 
> Fixes: 912b341585e3 ("platform/x86: mlx-platform: Remove PSU EEPROM from MSN274x platform configuration")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Thank you for your patch.

Note that there are 4 more cases where the foo1 and foo2 in:
.data = foo1 and .count = ARRAY_SIZE(foo2) are not the same.

There are 2 cases where .count is set to ARRAY_SIZE(mlxplat_mlxcpld_pwr)
instead of to ARRAY_SIZE(mlxplat_mlxcpld_default_pwr_items_data)

and there are 2 cases where .count is set to ARRAY_SIZE(mlxplat_mlxcpld_fan)
instead of to ARRAY_SIZE(mlxplat_mlxcpld_default_fan_items_data)

If one of the MLX people can provide a patch fixing this then that
would be great.

###

I've applied this patch to my review-hans  branch:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans

Note it will show up in my review-hans branch once I've pushed my
local branch there, which might take a while.

Once I've run some tests on this branch the patches there will be
added to the platform-drivers-x86/for-next branch and eventually
will be included in the pdx86 pull-request to Linus for the next
merge-window.

Regards,

Hans





> ---
>  drivers/platform/x86/mlx-platform.c | 13 ++-----------
>  1 file changed, 2 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/platform/x86/mlx-platform.c b/drivers/platform/x86/mlx-platform.c
> index 598f44558764..6a634b72bfc2 100644
> --- a/drivers/platform/x86/mlx-platform.c
> +++ b/drivers/platform/x86/mlx-platform.c
> @@ -319,15 +319,6 @@ static struct i2c_mux_reg_platform_data mlxplat_extended_mux_data[] = {
>  };
>  
>  /* Platform hotplug devices */
> -static struct i2c_board_info mlxplat_mlxcpld_psu[] = {
> -	{
> -		I2C_BOARD_INFO("24c02", 0x51),
> -	},
> -	{
> -		I2C_BOARD_INFO("24c02", 0x50),
> -	},
> -};
> -
>  static struct i2c_board_info mlxplat_mlxcpld_pwr[] = {
>  	{
>  		I2C_BOARD_INFO("dps460", 0x59),
> @@ -456,7 +447,7 @@ static struct mlxreg_core_item mlxplat_mlxcpld_default_items[] = {
>  		.aggr_mask = MLXPLAT_CPLD_AGGR_PSU_MASK_DEF,
>  		.reg = MLXPLAT_CPLD_LPC_REG_PSU_OFFSET,
>  		.mask = MLXPLAT_CPLD_PSU_MASK,
> -		.count = ARRAY_SIZE(mlxplat_mlxcpld_psu),
> +		.count = ARRAY_SIZE(mlxplat_mlxcpld_default_psu_items_data),
>  		.inversed = 1,
>  		.health = false,
>  	},
> @@ -495,7 +486,7 @@ static struct mlxreg_core_item mlxplat_mlxcpld_comex_items[] = {
>  		.aggr_mask = MLXPLAT_CPLD_AGGR_MASK_CARRIER,
>  		.reg = MLXPLAT_CPLD_LPC_REG_PSU_OFFSET,
>  		.mask = MLXPLAT_CPLD_PSU_MASK,
> -		.count = ARRAY_SIZE(mlxplat_mlxcpld_psu),
> +		.count = ARRAY_SIZE(mlxplat_mlxcpld_default_psu_items_data),
>  		.inversed = 1,
>  		.health = false,
>  	},
>