gianfar: Fix Rx byte accounting for ndev stats
authorClaudiu Manoil <claudiu.manoil@nxp.com>
Tue, 27 Feb 2018 15:33:10 +0000 (17:33 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 30 May 2018 05:50:33 +0000 (07:50 +0200)
commit6a2f2824eec75251cdedd9db2f10a224b018188f
tree83b5810ada0d4f3b648259ccce31b33b59c1e054
parentc0ce44186a8810c80fefe5d9fb5277f692971c39
gianfar: Fix Rx byte accounting for ndev stats

[ Upstream commit 590399ddf9561f2ed0839311c8ae1be21597ba68 ]

Don't include in the Rx bytecount of the packet sent up the stack:
the FCB (frame control block), and the padding bytes inserted by
the controller into the frame payload, nor the FCS. All these are
being pulled out of the skb by gfar_process_frame().
This issue is old, likely from the driver's beginnings, however
it was amplified by recent:
commit d903ec77118c ("gianfar: simplify FCS handling and fix memory leak")
which basically added the FCS to the Rx bytecount, and so brought
this to my attention.

Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/net/ethernet/freescale/gianfar.c