netdev - Re: [PATCH net-next 1/6] tcp_metrics: panic when tcp

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Date:	Wed, 11 Mar 2015 22:22:50 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	David Miller <davem@...emloft.net>
CC:	edumazet@...gle.com, netdev@...r.kernel.org,
	stephen@...workplumber.org, nicolas.dichtel@...nd.com,
	roopa@...ulusnetworks.com, hannes@...essinduktion.org,
	ddutt@...ulusnetworks.com, vipin@...ulusnetworks.com,
	shmulik.ladkani@...il.com, dsahern@...il.com
Subject: Re: [PATCH net-next 1/6] tcp_metrics: panic when tcp_metrics can
 not be allocated

Hello.

On 03/09/2015 09:50 PM, Sergei Shtylyov wrote:

>> Panic so that in the unlikely event we have problems we will have a
>> clear place to start debugging instead of a mysterious NULL pointer
>> deference later on.

>> Signed-off-by: "Eric W. Biederman" <ebiederm@...ssion.com>
>> ---
>>   net/ipv4/tcp_metrics.c | 1 +
>>   1 file changed, 1 insertion(+)

>> diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
>> index e5f41bd5ec1b..fdf4bdda971f 100644
>> --- a/net/ipv4/tcp_metrics.c
>> +++ b/net/ipv4/tcp_metrics.c
>> @@ -1186,5 +1186,6 @@ cleanup_subsys:
>>       unregister_pernet_subsys(&tcp_net_metrics_ops);
>>
>>   cleanup:
>> +    panic("Could not allocate the tcp_metrics hash table\n");
>>       return;

>     You can drop this *return* as well, it serves not purpose.

    Ah, it used to have a purpose before your patch... but now it surely doesn't.

>>   }

WBR, Sergei

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