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

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Date:   Mon, 7 Dec 2020 14:02:07 +0000
From:   Vadim Pasternak <vadimp@...dia.com>
To:     Hans de Goede <hdegoede@...hat.com>,
        Arnd Bergmann <arnd@...nel.org>,
        "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" 
        <platform-driver-x86@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "clang-built-linux@...glegroups.com" 
        <clang-built-linux@...glegroups.com>
Subject: RE: [PATCH] platform/x86: mlx-platform: remove an unused variable



> -----Original Message-----
> From: Hans de Goede <hdegoede@...hat.com>
> Sent: Monday, December 07, 2020 3:54 PM
> 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.

Hi,

I'll provide a patch.

Thanks,
Vadim.

> 
> ###
> 
> 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,
> >  	},
> >