linux-kernel - Re: [PATCH 16/43] drivers/net/cxgb3: fix sparse warning: symbol shadows an earlier one

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Message-ID: <154e089b0902151210t4eba8c96le0343b722f47b169@mail.gmail.com>
Date:	Sun, 15 Feb 2009 21:10:18 +0100
From:	Hannes Eder <hannes@...neseder.net>
To:	wharms@....de
Cc:	netdev@...r.kernel.org, kernel-janitors@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 16/43] drivers/net/cxgb3: fix sparse warning: symbol 
	shadows an earlier one

On Sun, Feb 15, 2009 at 3:14 PM, walter harms <wharms@....de> wrote:
> Hannes Eder schrieb:
>> Impact: Move variable declaration as close to usage as possible.
>>
>> Fix this sparse warning:
>>   drivers/net/cxgb3/cxgb3_main.c:1586:21: warning: symbol 'cap' shadows an earlier one
>>
>> Signed-off-by: Hannes Eder <hannes@...neseder.net>
>> ---
>>  drivers/net/cxgb3/cxgb3_main.c |    3 +--
>>  1 files changed, 1 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/net/cxgb3/cxgb3_main.c b/drivers/net/cxgb3/cxgb3_main.c
>> index f2c7cc3..0f6062a 100644
>> --- a/drivers/net/cxgb3/cxgb3_main.c
>> +++ b/drivers/net/cxgb3/cxgb3_main.c
>> @@ -1565,7 +1565,6 @@ static int speed_duplex_to_caps(int speed, int duplex)
>>
>>  static int set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
>>  {
>> -     int cap;
>>       struct port_info *p = netdev_priv(dev);
>>       struct link_config *lc = &p->link_config;
>>
>> @@ -1575,7 +1574,7 @@ static int set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
>>                * being requested.
>>                */
>>               if (cmd->autoneg == AUTONEG_DISABLE) {
>> -                     cap = speed_duplex_to_caps(cmd->speed, cmd->duplex);
>> +                     int cap = speed_duplex_to_caps(cmd->speed, cmd->duplex);
>>                       if (lc->supported & cap)
>>                               return 0;
>>               }
>>
>
> Hello Hannes,
> it seems that "cap" can be dropped completely.
>
> if (lc->supported & speed_duplex_to_caps(cmd->speed, cmd->duplex) )
>        return 0;

Hi Walter,

You are right, but we would hit the 80 characters per line limit,
90 in this case, and a similar construct is used a few lines
below so I suggest to leave it this way.

-Hannes
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