linux-kernel - Re: [PATCH 03/11] drivers: net: optimize hex2bin()

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Message-ID: <4B8C485A.8000409@am.sony.com>
Date:	Mon, 1 Mar 2010 15:06:02 -0800
From:	Geoff Levand <geoffrey.levand@...sony.com>
To:	Andy Shevchenko <andy.shevchenko@...il.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Andy Shevchenko <ext-andriy.shevchenko@...ia.com>
Subject: Re: [PATCH 03/11] drivers: net: optimize hex2bin()

Hi Andy,

Sorry for the delay, I was working away from my test equipment
and wanted to test this change before commenting.

On 02/22/2010 10:09 AM, Andy Shevchenko wrote:
> From: Andy Shevchenko <ext-andriy.shevchenko@...ia.com>
> 
> Optimize hex2bin() function used in ps3_gelic_wireless.c. It requires to have
> hex_to_bin() implementation introduced by starter patch in series.
> 
> Signed-off-by: Andy Shevchenko <ext-andriy.shevchenko@...ia.com>
> Cc: Geoff Levand <geoffrey.levand@...sony.com>
> ---
>  drivers/net/ps3_gelic_wireless.c |   12 ++++--------
>  1 files changed, 4 insertions(+), 8 deletions(-)
> 
> --- a/drivers/net/ps3_gelic_wireless.c
> +++ b/drivers/net/ps3_gelic_wireless.c
> @@ -1394,23 +1394,19 @@ static int gelic_wl_get_mode(struct net_device *netdev,
>  static int hex2bin(u8 *str, u8 *bin, unsigned int len)
>  {
>  	unsigned int i;
> -	static unsigned char *hex = "0123456789ABCDEF";
> -	unsigned char *p, *q;
> -	u8 tmp;
>  
>  	if (len != WPA_PSK_LEN * 2)
>  		return -EINVAL;
>  
>  	for (i = 0; i < WPA_PSK_LEN * 2; i += 2) {
> -		p = strchr(hex, toupper(str[i]));
> -		q = strchr(hex, toupper(str[i + 1]));
> -		if (!p || !q) {
> +		int h = hex_to_bin(str[i]);
> +		int l = hex_to_bin(str[i+1]);
> +		if ((h == -1) || (l == -1)) {

We should have a blank line between the two variable declarations
and the if statement here.

Please make an updated patch, otherwise this patch looks OK,
and seems to work correctly on PS3.

-Geoff


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