linux-kernel - Re: [PATCHv3]Checks for Null value in function *get

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Date:	Mon, 16 Jun 2014 11:14:45 -0400
From:	Nick Krause <xerofoify@...il.com>
To:	Levente Kurusa <levex@...ux.com>
Cc:	swise@...lsio.com, roland@...nel.org, sean.hefty@...el.com,
	hal.rosenstock@...il.com, linux-rdma@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCHv3]Checks for Null value in function *get_skub

>From what I know yes so I would close the bug at the the link in
my previous email and just void my patch.
Cheers Nick

On Mon, Jun 16, 2014 at 11:12 AM, Levente Kurusa <levex@...ux.com> wrote:
> On 06/16/2014 05:08 PM, Nicholas Krause wrote:
>>
>> Signed-off-by: Nicholas Krause <xerofoify@...il.com>
>> ---
>>   drivers/infiniband/hw/cxgb4/cm.c | 8 +++-----
>>   1 file changed, 3 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/infiniband/hw/cxgb4/cm.c
>> b/drivers/infiniband/hw/cxgb4/cm.c
>> index f9477e2..2d56983 100644
>> --- a/drivers/infiniband/hw/cxgb4/cm.c
>> +++ b/drivers/infiniband/hw/cxgb4/cm.c
>> @@ -340,15 +340,13 @@ static int status2errno(int status)
>>    */
>>   static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
>>   {
>>   if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
>>                  skb_trim(skb, 0);
>>                  skb_get(skb);
>>                  skb_reset_transport_header(skb);
>>         } else {
>> +               if (skb)
>> +                       kfree (skb);
>>                 skb = alloc_skb(len, gfp);
>>         }
>>         t4_set_arp_err_handler(skb, NULL, NULL);
>>
>
> Isn't kfree(NULL) legal?
>
> (i.e. the if statement is useless)
>
> Thanks,
>     Levente Kurusa
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