netdev - netif_needs

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Message-ID: <BAY121-W4698632384BFB6587EAB45B6EB0@phx.gbl>
Date:	Tue, 15 Apr 2008 16:52:20 +0000
From:	Kostya B <bkostya@...mail.com>
To:	<netdev@...r.kernel.org>
Subject: netif_needs_gso behavior


Hello,

Please help me to understand why != CHECKSUM_PARTIAL packet requires gso? In the case of TCP it is ok, however UDP could be normally unchecked.

netif_needs_gso() 
{
 	return skb_is_gso(skb) &&
 	       (!skb_gso_ok(skb, dev->features) ||
 		unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
}

Thanks
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