From: Simon Horman Date: Tue, 3 Jun 2014 23:53:17 +0000 (+0900) Subject: MPLS: Use mpls_features to activate software MPLS GSO segmentation X-Git-Tag: omap-for-v3.16/fixes-against-rc1~36^2~65 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3b392ddba25a95dcf5fb30b33358961c49dd5cfc;p=pandora-kernel.git MPLS: Use mpls_features to activate software MPLS GSO segmentation If an MPLS packet requires segmentation then use mpls_features to determine if the software implementation should be used. As no driver advertises MPLS GSO segmentation this will always be the case. I had not noticed that this was necessary before as software MPLS GSO segmentation was already being used in my test environment. I believe that the reason for that is the skbs in question always had fragments and the driver I used does not advertise NETIF_F_FRAGLIST (which seems to be the case for most drivers). Thus software segmentation was activated by skb_gso_ok(). This introduces the overhead of an extra call to skb_network_protocol() in the case where where CONFIG_NET_MPLS_GSO is set and skb->ip_summed == CHECKSUM_NONE. Thanks to Jesse Gross for prompting me to investigate this. Signed-off-by: Simon Horman Acked-by: YAMAMOTO Takashi Acked-by: Thomas Graf Signed-off-by: David S. Miller --- Reading git-diff-tree failed