netdev - Re: [NET-NEXT PATCH 1/2] e1000e: don't generate bad checksums for tcp packets with 0 csum

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Message-Id: <20081009.142936.00354103.davem@davemloft.net>
Date:	Thu, 09 Oct 2008 14:29:36 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jeffrey.t.kirsher@...el.com
Cc:	jeff@...zik.org, netdev@...r.kernel.org, david.graham@...el.com,
	jesse.brandeburg@...el.com
Subject: Re: [NET-NEXT PATCH 1/2] e1000e: don't generate bad checksums for
 tcp packets with 0 csum

From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Date: Thu, 09 Oct 2008 09:58:31 -0700

> When offloading transmit checksums only, the driver was not
> correctly configuring the hardware to handle the case of a zero
> checksum.  For UDP the correct behavior is to leave it alone, but
> for tcp the checksum must be changed from 0x0000 to 0xFFFF.  The
> hardware takes care of this case but only if it is told the
> packet is tcp.
> 
> Signed-off-by: Dave Graham <david.graham@...el.com>
> Signed-off-by: Jesse Brandeburg <jesse.brandeburg@...el.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>

Applied.
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