[Click] e1000e-0.4.1.7 polling driver update.

[Joonwoo Park]

Hi,

I've updated e1000e-0.4.1.7 polling extension patch.
Mainly this change set intends to fix kernel oops which happens on
Intel 82571+ with mtu > 1500. (Nuutti Varis <nvaris at cc.hut.fi>
reported this bug)
It also contains minor fixes to fix another kernel oops and code clean up.

If you are using old version of driver, please try this patch and let
me know how it works. It will be very appreciated.

Patch set contains followings
- e1000e-0.4.1.7-2010-02-21.polling.patch: cumulative patch to apply
to vanilla e1000e-0.4.1.7 driver.
- 0001-PollDevice-allocates-specified-size-of-receive-buffe.patch:
patch to apply to click to get proper rx buffer length.
- 0001-added-rx_buffer_len-to-net_device-structure.patch: patch to
apply to linux after linux-2.6.24.7-patch.

Known issue: It seems to me we've been having race in the driver when
PollDevice() is already running if interface goes up & down (mtu
change also makes device up & down) but I couldn't fix it yet.

Eddie,
Please review this and consider to apply.

Thanks,
Joonwoo
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