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 04:29:34 +0100
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	"Huang, Xiong" <xiong@....qualcomm.com>
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

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>
...

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