linux-kernel - Re: [PATCH 1/6] platform/x86: wmi: Remove unused variable in address space handler

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Date: Mon, 18 Dec 2023 14:05:30 +0200 (EET)
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: Armin Wolf <W_Armin@....de>
cc: Hans de Goede <hdegoede@...hat.com>, platform-driver-x86@...r.kernel.org, 
    LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/6] platform/x86: wmi: Remove unused variable in address
 space handler

On Sat, 16 Dec 2023, Armin Wolf wrote:

> The variable "i" is always zero and only used in shift operations.
> Remove it to make the code more readable.
> 
> Signed-off-by: Armin Wolf <W_Armin@....de>
> ---
>  drivers/platform/x86/wmi.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
> index 7303702290e5..906d3a2831ae 100644
> --- a/drivers/platform/x86/wmi.c
> +++ b/drivers/platform/x86/wmi.c
> @@ -1144,7 +1144,7 @@ acpi_wmi_ec_space_handler(u32 function, acpi_physical_address address,
>  			  u32 bits, u64 *value,
>  			  void *handler_context, void *region_context)
>  {
> -	int result = 0, i = 0;
> +	int result = 0;
>  	u8 temp = 0;
> 
>  	if ((address > 0xFF) || !value)
> @@ -1158,9 +1158,9 @@ acpi_wmi_ec_space_handler(u32 function, acpi_physical_address address,
> 
>  	if (function == ACPI_READ) {
>  		result = ec_read(address, &temp);
> -		(*value) |= ((u64)temp) << i;
> +		*value = temp;
>  	} else {
> -		temp = 0xff & ((*value) >> i);
> +		temp = 0xff & *value;
>  		result = ec_write(address, temp);
>  	}

Seems to have been like this already when it got introduced...

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>

-- 
 i.