netdev - Re: [PATCH net 2/2] net: WARN if skb_checksum_help() is called on skb requiring segmentation

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Message-ID: <20120117061115.GA14918@gondor.apana.org.au>
Date:	Tue, 17 Jan 2012 17:11:15 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Ben Hutchings <bhutchings@...arflare.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH net 2/2] net: WARN if skb_checksum_help() is called on
	skb requiring segmentation

On Mon, Jan 16, 2012 at 10:43:38PM +0000, Ben Hutchings wrote:
> skb_checksum_help() has never done anything useful with skbs that
> require segmentation.  Setting skb->ip_summed = CHECKSUM_NONE makes
> them invalid and provokes a later WARNing in skb_gso_segment().
> 
> Passing such an skb to skb_checksum_help() indicates a bug, so we
> should warn about it immediately.  Move the warning from
> skb_gso_segment() into a shared function, and add the calling function
> name, gso_type and gso_size to it.
> 
> Signed-off-by: Ben Hutchings <bhutchings@...arflare.com>
> ---
> The price for writing the warning format only once is having to pass in
> the calling function name.  Not sure whether it's a good trade-off.

Do we really need the name since we should get a back trace?

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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