linux-kernel - Re: [PATCH v3 4/4] staging: rtl8723bs: use mac_pton() in rtw_macaddr

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Date:   Tue, 26 Jun 2018 22:48:19 +0200
From:   Michael Straube <straube.linux@...il.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devel@...verdev.osuosl.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Joe Perches <joe@...ches.com>,
        Dan Carpenter <dan.carpenter@...cle.com>
Subject: Re: [PATCH v3 4/4] staging: rtl8723bs: use mac_pton() in
 rtw_macaddr_cfg()

On 06/26/18 19:34, Andy Shevchenko wrote:
> On Tue, Jun 26, 2018 at 11:14 AM, Michael Straube
> <straube.linux@...il.com> wrote:
>> Use the mac_pton() helper to convert the mac address string.
>>
>> The functions key_char2num() and key_2char2num() are not used
>> anywhere else and can be removed.
>>
>> This also has the benefit of validating the input since mac_pton()
>> returns false if the string is not valid.
>>
> 
> FWIW,
> Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
> 

Thanks.

>> Signed-off-by: Michael Straube <straube.linux@...il.com>
>> ---
>>   .../staging/rtl8723bs/core/rtw_ieee80211.c    | 30 +++----------------
>>   .../staging/rtl8723bs/os_dep/ioctl_linux.c    |  3 --
>>   2 files changed, 4 insertions(+), 29 deletions(-)
>>
>> diff --git a/drivers/staging/rtl8723bs/core/rtw_ieee80211.c b/drivers/staging/rtl8723bs/core/rtw_ieee80211.c
>> index 8af4a89e632f..8e0025e1ff14 100644
>> --- a/drivers/staging/rtl8723bs/core/rtw_ieee80211.c
>> +++ b/drivers/staging/rtl8723bs/core/rtw_ieee80211.c
>> @@ -1137,25 +1137,6 @@ ParseRes rtw_ieee802_11_parse_elems(u8 *start, uint len,
>>
>>   }
>>
>> -static u8 key_char2num(u8 ch);
>> -static u8 key_char2num(u8 ch)
>> -{
>> -               if ((ch >= '0') && (ch <= '9'))
>> -                       return ch - '0';
>> -               else if ((ch >= 'a') && (ch <= 'f'))
>> -                       return ch - 'a' + 10;
>> -               else if ((ch >= 'A') && (ch <= 'F'))
>> -                       return ch - 'A' + 10;
>> -               else
>> -                       return 0xff;
>> -}
>> -
>> -u8 key_2char2num(u8 hch, u8 lch);
>> -u8 key_2char2num(u8 hch, u8 lch)
>> -{
>> -               return ((key_char2num(hch) << 4) | key_char2num(lch));
>> -}
>> -
>>   void rtw_macaddr_cfg(struct device *dev, u8 *mac_addr)
>>   {
>>          u8 mac[ETH_ALEN];
>> @@ -1166,14 +1147,11 @@ void rtw_macaddr_cfg(struct device *dev, u8 *mac_addr)
>>          if (!mac_addr)
>>                  return;
>>
>> -       if (rtw_initmac) {      /*      Users specify the mac address */
>> -               int jj, kk;
>> -
>> -               for (jj = 0, kk = 0; jj < ETH_ALEN; jj++, kk += 3) {
>> -                       mac[jj] = key_2char2num(rtw_initmac[kk], rtw_initmac[kk + 1]);
>> -               }
>> +       if (rtw_initmac && mac_pton(rtw_initmac, mac)) {
>> +               /* Users specify the mac address */
>>                  ether_addr_copy(mac_addr, mac);
>> -       } else{ /*      Use the mac address stored in the Efuse */
>> +       } else {
>> +               /* Use the mac address stored in the Efuse */
>>                  ether_addr_copy(mac, mac_addr);
>>          }
>>
>> diff --git a/drivers/staging/rtl8723bs/os_dep/ioctl_linux.c b/drivers/staging/rtl8723bs/os_dep/ioctl_linux.c
>> index 39502156f652..4eb51f45b387 100644
>> --- a/drivers/staging/rtl8723bs/os_dep/ioctl_linux.c
>> +++ b/drivers/staging/rtl8723bs/os_dep/ioctl_linux.c
>> @@ -32,9 +32,6 @@
>>   #define WEXT_CSCAN_HOME_DWELL_SECTION  'H'
>>   #define WEXT_CSCAN_TYPE_SECTION                'T'
>>
>> -
>> -extern u8 key_2char2num(u8 hch, u8 lch);
>> -
>>   static u32 rtw_rates[] = {1000000, 2000000, 5500000, 11000000,
>>          6000000, 9000000, 12000000, 18000000, 24000000, 36000000, 48000000, 54000000};
>>
>> --
>> 2.18.0
>>
> 
> 
>