netdev - RE: Atheros Communications Inc. AR8121/AR8113/AR8114 Gigabit or Fast Ethernet (rev b0) 1.0.0.7 md5/sha1 corrupted using NFS and samba (updated) Version 2

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Date:	Thu, 28 Mar 2013 03:39:33 +0000
From:	"Huang, Xiong" <xiong@....qualcomm.com>
To:	Hannes Frederic Sowa <hannes@...essinduktion.org>
CC:	Sven Hartge <sven@...nhartge.de>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: Atheros Communications Inc. AR8121/AR8113/AR8114 Gigabit or
 Fast Ethernet (rev b0) 1.0.0.7 md5/sha1 corrupted using NFS and samba
 (updated) Version 2

Dump every packet length & read_offset value,  compare them.

> -----Original Message-----
> From: Hannes Frederic Sowa [mailto:hannes@...essinduktion.org]
> Sent: Thursday, March 28, 2013 11:30 AM
> To: Huang, Xiong
> Cc: Sven Hartge; netdev@...r.kernel.org
> Subject: Re: Atheros Communications Inc. AR8121/AR8113/AR8114 Gigabit or
> Fast Ethernet (rev b0) 1.0.0.7 md5/sha1 corrupted using NFS and samba
> (updated) Version 2
> 
> On Thu, Mar 28, 2013 at 03:25:29AM +0000, Huang, Xiong wrote:
> > Please don't revise following code:
> >
> > 			rx_page->read_offset +=
> > 				(((u32)((prrs->word1 >>
> RRS_PKT_SIZE_SHIFT) &
> > 				RRS_PKT_SIZE_MASK) +
> > 				sizeof(struct atl1e_recv_ret_status) + 31) &
> > 						0xFFFFFFE0);
> >
> > Here 32bytes alignment is no matter with Page alignment.
> 
> If I revert this change I get sequence errors:
> 
> [  781.449864] ATL1E 0000:04:00.0: irq 45 for MSI/MSI-X [  781.454634] IPv6:
> ADDRCONF(NETDEV_UP): p33p1: link is not ready [  782.893744] ATL1E
> 0000:04:00.0 p33p1: NIC Link is Up <100 Mbps Full Duplex> [  782.893797] IPv6:
> ADDRCONF(NETDEV_CHANGE): p33p1: link becomes ready [  783.194443]
> ATL1E 0000:04:00.0 p33p1: rx sequence number error (rx=0) (expect=1)
> [  783.204497] ATL1E 0000:04:00.0 p33p1: NIC Link is Up <100 Mbps Full Duplex>
> [  783.225336] ATL1E 0000:04:00.0 p33p1: rx sequence number error (rx=0)
> (expect=1) [  783.236636] ATL1E 0000:04:00.0 p33p1: NIC Link is Up <100 Mbps
> Full Duplex> [  783.462652] ATL1E 0000:04:00.0 p33p1: rx sequence number
> error (rx=0) (expect=1) [  783.472530] ATL1E 0000:04:00.0 p33p1: NIC Link is
> Up <100 Mbps Full Duplex> [  784.038976] ATL1E 0000:04:00.0 p33p1: rx
> sequence number error (rx=0) (expect=1) [  784.047354] ATL1E 0000:04:00.0
> p33p1: NIC Link is Up <100 Mbps Full Duplex> ...