linux-kernel - Re: [PATCH net] tipc: Remove redundant call to TLV

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Message-Id: <20231117.092658.1793984163746462941.syoshida@redhat.com>
Date:   Fri, 17 Nov 2023 09:26:58 +0900 (JST)
From:   Shigeru Yoshida <syoshida@...hat.com>
To:     pabeni@...hat.com
Cc:     jmaloy@...hat.com, ying.xue@...driver.com, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, netdev@...r.kernel.org,
        tipc-discussion@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] tipc: Remove redundant call to TLV_SPACE()

On Thu, 16 Nov 2023 10:46:30 +0100, Paolo Abeni wrote:
> Hi,
> 
> On Tue, 2023-11-14 at 23:43 +0900, Shigeru Yoshida wrote:
>> The purpose of TLV_SPACE() is to add the TLV descriptor size to the size of
>> the TLV value passed as argument and align the resulting size to
>> TLV_ALIGNTO.
>> 
>> tipc_tlv_alloc() calls TLV_SPACE() on its argument. In other words,
>> tipc_tlv_alloc() takes its argument as the size of the TLV value. So the
>> call to TLV_SPACE() in tipc_get_err_tlv() is redundant. Let's remove this
>> redundancy.
>> 
>> Fixes: d0796d1ef63d ("tipc: convert legacy nl bearer dump to nl compat")
>> Signed-off-by: Shigeru Yoshida <syoshida@...hat.com>
> 
> The patch LGTM, but I think this is more a cleanup then a fix, please
> re-submit it for net-next, dropping the Fixes tag (so it will not land
> in stable tree).
> 
> With the above you can add:
> 
> Acked-by: Paolo Abeni <pabeni@...hat.com>

Hi Paolo,

Thanks for your feedback! I'll resubmit the patch for net-next.

Thanks
Shigeru

>> ---
>>  net/tipc/netlink_compat.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>> 
>> diff --git a/net/tipc/netlink_compat.c b/net/tipc/netlink_compat.c
>> index 5bc076f2fa74..db0365c9b8bd 100644
>> --- a/net/tipc/netlink_compat.c
>> +++ b/net/tipc/netlink_compat.c
>> @@ -167,7 +167,7 @@ static struct sk_buff *tipc_get_err_tlv(char *str)
>>  	int str_len = strlen(str) + 1;
>>  	struct sk_buff *buf;
>>  
>> -	buf = tipc_tlv_alloc(TLV_SPACE(str_len));
>> +	buf = tipc_tlv_alloc(str_len);
>>  	if (buf)
>>  		tipc_add_tlv(buf, TIPC_TLV_ERROR_STRING, str, str_len);
>>  
>