From: Hariprasad Shenai <haripra...@chelsio.com>
Date: Thu, 28 Jul 2016 13:28:57 +0530
> The commit 637d3e997351 ("cxgb4: Discard the packet if the length is
> greater than mtu") introduced a regression in the VLAN interface
> performance when Tx VLAN offload is disabled.
>
> Check if skb is tagged, regardless of whether it is hardware accelerated
> or not. Presently we were checking only for hardware acclereated one,
> which caused performance to drop to ~0.17Mbps on a 10GbE adapter for
> VLAN interface, when tx vlan offload is turned off using ethtool.
> The ethernet head length calculation was going wrong in this case, and
> driver ended up dropping packets.
>
> Fixes: 637d3e997351 ("cxgb4: Discard the packet if the length is greater than
> mtu")
>
> Signed-off-by: Hariprasad Shenai <haripra...@chelsio.com>
Applied.
