linux-kernel - Re: [PATCH -next] drivers: net: declance: fix comparing pointer to 0

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Message-ID: <86f4d4a0-627d-84aa-c785-4dac426b7cc6@huawei.com>
Date:   Tue, 21 Jan 2020 16:54:15 +0800
From:   Chen Zhou <chenzhou10@...wei.com>
To:     Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        <davem@...emloft.net>, <mhabets@...arflare.com>, <kuba@...nel.org>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -next] drivers: net: declance: fix comparing pointer to 0

Hi Sergei,

On 2020/1/21 16:39, Sergei Shtylyov wrote:
> Hello!
> 
> On 21.01.2020 4:35, Chen Zhou wrote:
> 
>> Fixes coccicheck warning:
>>
>> ./drivers/net/ethernet/amd/declance.c:611:14-15:
>>     WARNING comparing pointer to 0
>>
>> Compare pointer-typed values to NULL rather than 0.
> 
>    I don't see NULL in the patch -- you used ! instead.

Yeah, i used ! here.

Thanks,
Chen Zhou

> 
>> Signed-off-by: Chen Zhou <chenzhou10@...wei.com>
>> ---
>>   drivers/net/ethernet/amd/declance.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/net/ethernet/amd/declance.c b/drivers/net/ethernet/amd/declance.c
>> index 6592a2d..7282ce5 100644
>> --- a/drivers/net/ethernet/amd/declance.c
>> +++ b/drivers/net/ethernet/amd/declance.c
>> @@ -608,7 +608,7 @@ static int lance_rx(struct net_device *dev)
>>               len = (*rds_ptr(rd, mblength, lp->type) & 0xfff) - 4;
>>               skb = netdev_alloc_skb(dev, len + 2);
>>   -            if (skb == 0) {
>> +            if (!skb) {
>>                   dev->stats.rx_dropped++;
>>                   *rds_ptr(rd, mblength, lp->type) = 0;
>>                   *rds_ptr(rd, rmd1, lp->type) =
> 
> MBR, Sergei
> 
>