linux-kernel - Re: [PATCH v3 1/6] Staging: rtl8192e: Refactored rtllib

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Date:   Sat, 2 Jul 2022 08:07:06 +0200
From:   Philipp Hortmann <philipp.g.hortmann@...il.com>
To:     Felix Schlepper <f3sch.git@...look.com>, gregkh@...uxfoundation.org
Cc:     linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        wjsota@...il.com
Subject: Re: [PATCH v3 1/6] Staging: rtl8192e: Refactored rtllib_modes

On 7/1/22 11:24, Felix Schlepper wrote:
> The initial reason for looking at this code was an
> issue raised by checkpatch.pl:
> 
>       $ ./scripts/checkpatch.pl --terse -f drivers/staging/rtl8192e/rtllib_wx.c
>       CHECK: Please use a blank line after function/struct/union/enum
>       declarations
> 
> The additional blank line above the struct/before the headers is
> just cleaner.
> 
> However, as it turns out since there is no str formatting required
> One can replace the error prone str + size struct with a char array.
> The rest of this patch fixes the usecases.
> 
> Signed-off-by: Felix Schlepper <f3sch.git@...look.com>
> ---
>   drivers/staging/rtl8192e/rtllib_wx.c | 21 ++++++---------------
>   1 file changed, 6 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/staging/rtl8192e/rtllib_wx.c b/drivers/staging/rtl8192e/rtllib_wx.c
> index cf9a240924f2..b7f19b38b0e1 100644
> --- a/drivers/staging/rtl8192e/rtllib_wx.c
> +++ b/drivers/staging/rtl8192e/rtllib_wx.c
> @@ -17,17 +17,9 @@
>   #include <linux/module.h>
>   #include <linux/etherdevice.h>
>   #include "rtllib.h"
> -struct modes_unit {
> -	char *mode_string;
> -	int mode_size;
> -};
> -static struct modes_unit rtllib_modes[] = {
> -	{"a", 1},
> -	{"b", 1},
> -	{"g", 1},
> -	{"?", 1},
> -	{"N-24G", 5},
> -	{"N-5G", 4},
> +
> +static const char * const rtllib_modes[] = {
> +	"a", "b", "g", "?", "N-24G", "N-5G"
>   };
>   
>   #define MAX_CUSTOM_LEN 64
> @@ -72,10 +64,9 @@ static inline char *rtl819x_translate_scan(struct rtllib_device *ieee,
>   	/* Add the protocol name */
>   	iwe.cmd = SIOCGIWNAME;
>   	for (i = 0; i < ARRAY_SIZE(rtllib_modes); i++) {
> -		if (network->mode&(1<<i)) {
> -			sprintf(pname, rtllib_modes[i].mode_string,
> -				rtllib_modes[i].mode_size);
> -			pname += rtllib_modes[i].mode_size;
> +		if (network->mode & BIT(i)) {
> +			strcpy(pname, rtllib_modes[i]);
> +			pname += strlen(rtllib_modes[i]);
>   		}
>   	}
>   	*pname = '\0';

Tested-by: Philipp Hortmann <philipp.g.hortmann@...il.com>