Martin Michlmayr [off-list ref] :
[...]

I'd like to backport the fix to the 2.6.18 kernel that is in our
stable release and have a couple of questions:
 - Does your later patch "align the IP header when there is no DMA
   constraint" fix any bugs or is it merely an improvement?

It fixes a "it was faster before" problem.

 - Should I change "align" to 8 for RTL_CFG_1, as it's done in
   current kernels?

No. RTL_CFG_1 is for the 8168 (slightly different beast).

I'd like to backport only the changes needed to actually fix the bug
in order to make sure I won't break any other devices.  The patch
below works for me but I'd like to hear your opinion about my
questions above.

If you have 6dccd16b7c2703e8bbf8bca62b5cf248332afbe2 applied, you
want c946b3047205d7e107be16885bbb42ab9f10350a too.

[...]

Some background: the Thecus N2100 is an ARM based NAS device with two
8169 ports. The chips exhibit PCI parity problems so
dev->broken_parity_status is set on this platform.

I remember it.

If you move from the 8110SB to the 8110SC, you will probably want to apply
65d916d95314566f426cc40ff0f17b754a773b0b

Btw, could you send me a dmesg from a recent kernel ? I'd like to keep a
trace of the XID value for your device.

-- 
Ueimor