[BUG] sky2 errors in 2.6.23-rc9-git1

[Ian Kumlien <pomac@vapor.com>]

Hi, 

Sorry about this but the latest sky2 seems damned odd.
I have been running with jumbo frames at home for quite some time but
with this kernel that doesn't work, i instead get loads of:
sky2 eth0: rx length error: status 0x5e60500 length 1510
sky2 eth0: rx length error: status 0x5e60500 length 1510
sky2 eth0: rx length error: status 0x5ea0500 length 1514
sky2 eth0: rx length error: status 0x5ea0500 length 1514

Where length can be just about anything from 800 -> MTU

That is not enough though, i also, for some reason, got several hangs:
sky2 eth0: hung mac 0:68 fifo 143 (133:76)
sky2 eth0: receiver hang detected
sky2 eth0: disabling interface
sky2 eth0: enabling interface
sky2 eth0: Link is up at 1000 Mbps, full duplex, flow control rx
sky2 eth0: hung mac 0:125 fifo 195 (93:88)
sky2 eth0: receiver hang detected
sky2 eth0: disabling interface
sky2 eth0: enabling interface
sky2 eth0: Link is up at 1000 Mbps, full duplex, flow control rx
sky2 eth0: hung mac 0:124 fifo 98 (10:108)
sky2 eth0: receiver hang detected
sky2 eth0: disabling interface
sky2 eth0: enabling interface
sky2 eth0: Link is up at 1000 Mbps, full duplex, flow control rx
sky2 eth0: hung mac 0:41 fifo 30 (187:17)
sky2 eth0: receiver hang detected
sky2 eth0: disabling interface
sky2 eth0: enabling interface
sky2 eth0: Link is up at 1000 Mbps, full duplex, flow control rx
...

All during about 2 minutes.

Could this be related to [sky2: sky2 FE+ receive status workaround]:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blobdiff;f=drivers/net/sky2.c;h=a3de0b6127ebb537b87a1849e207909fcc333ee4;hp=0792031a5cf959a1543f32f4e0f2ab4ccb7b0ec2;hb=3b12e0141f7a97c3b84731b5f935ed738bb6f960;hpb=ff0ce6845bc18292e80ea40d11c3d3a539a3fc5e

The chips being used are:
sky2 0000:02:00.0: v1.18 addr 0xdbffc000 irq 17 Yukon-EC (0xb6) rev 2
sky2 0000:02:00.0: v1.18 addr 0xfddfc000 irq 17 Yukon-EC (0xb6) rev 1

The receiver hang only happes on the REV 2 chip, which also reports:
sky2 0000:02:00.0: No interrupt generated using MSI, switching to INTx mode.

Ifconfig reports:
	REV 2 chip:
          RX packets:30492 errors:0 dropped:646 overruns:0 frame:646
          TX packets:29229 errors:0 dropped:0 overruns:0 carrier:0

	REV 1 chip:
          RX packets:19795 errors:0 dropped:131 overruns:0 frame:131
          TX packets:18588 errors:0 dropped:0 overruns:0 carrier:0

Let me know when jumbo frames work again, just mail me patches =)
(to tired to look in to it closer atm)

-- 
Ian Kumlien <pomac () vapor ! com> -- http://pomac.netswarm.net

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