[Intel-wired-lan] [PATCH 2/2] ixgbe: ixgbe_atr() compute l4_proto only if non-paged data has network/transport headers

[Singh, Krishneil K]

-----Original Message-----
From: Intel-wired-lan [mailto:intel-wired-lan-bounces at lists.osuosl.org] On Behalf Of Jeff Kirsher
Sent: Monday, October 24, 2016 3:37 PM
To: intel-wired-lan at lists.osuosl.org
Cc: Sowmini Varadhan <sowmini.varadhan at oracle.com>
Subject: [Intel-wired-lan] [PATCH 2/2] ixgbe: ixgbe_atr() compute l4_proto only if non-paged data has network/transport headers

From: Sowmini Varadhan <sowmini.varadhan at oracle.com>

For some Tx paths (e.g., tpacket_snd()), ixgbe_atr may be passed down an sk_buff that has the network and transport header in the paged data, so it needs to make sure these headers are available in the headlen bytes to calculate the l4_proto.

This patch expect that network and transport headers are already available in the non-paged header dat.  The assumption is that the caller has set this up if l4_proto based Tx steering is desired.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan at oracle.com>
Reviewed-by: Alexander Duyck <alexander.h.duyck at intel.com>
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Tested-by: Krishneil Singh <krishneil.k.singh at intel.com>