On Wed, 02 May 2012 17:12:06 +0200
Niccolò Belli [off-list ref] wrote:

Il 30/04/2012 21:25, Stephen Hemminger ha scritto:

quoted

You are getting CRC and FIFO overrun errors. What laptop is this?
Everything works fine on my old Fuijitsu with same chip (but rev 14).
You could try taking out the status bit checks and see if the
packets are really okay and the Marvell chip is complaining about
bogus status.

I compiled 3.4-rc5 + both sky2 patches you recently published and I did 
some more tests:

Point to point: works flawlessly.
Attached to the switch: rx errors, even downloading a very small 89 KB 
file :(

This is the dump using IPv4:
http://files.linuxsystems.it/temp/2012-05/sky2_ipv4.pcap

dmesg (I did an rmmod -f sky2 before doing the test):
[ 1147.885026] sky2 0000:06:00.0: eth0: disabling interface
[ 1148.909548] sky2: driver version 1.30
[ 1148.909764] sky2 0000:06:00.0: Yukon-2 EC Ultra chip revision 3
[ 1148.914367] sky2 0000:06:00.0: irq 45 for MSI/MSI-X
[ 1148.916310] sky2 0000:06:00.0: eth0: addr 00:13:77:b4:1b:fa
[ 1148.942297] sky2 0000:06:00.0: eth0: enabling interface
[ 1148.944225] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 1151.496295] sky2 0000:06:00.0: eth0: Link is up at 1000 Mbps, full 
duplex, flow control rx
[ 1151.497614] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 1178.479437] device eth0 entered promiscuous mode
[ 1179.541707] *sky2 0000:06:00.0: eth0: rx error, status 0x7ffc0001 
length 1468*
[ 1179.544110] *sky2 0000:06:00.0: eth0: rx error, status 0x7ffc0001 
length 1468*
[ 1181.642598] device eth0 left promiscuous mode




This is the dump using IPv6:
http://files.linuxsystems.it/temp/2012-05/sky2_ipv6.pcap

dmesg (I did an rmmod -f sky2 before doing the test):
[ 1314.225572] sky2 0000:06:00.0: eth0: disabling interface
[ 1315.248523] sky2: driver version 1.30
[ 1315.248731] sky2 0000:06:00.0: Yukon-2 EC Ultra chip revision 3
[ 1315.249333] sky2 0000:06:00.0: irq 45 for MSI/MSI-X
[ 1315.250307] sky2 0000:06:00.0: eth0: addr 00:13:77:b4:1b:fa
[ 1315.271364] sky2 0000:06:00.0: eth0: enabling interface
[ 1315.273015] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 1317.875985] sky2 0000:06:00.0: eth0: Link is up at 1000 Mbps, full 
duplex, flow control rx
[ 1317.877311] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 1345.946062] device eth0 entered promiscuous mode
[ 1349.119848] device eth0 left promiscuous mode
[ 1376.231698] device eth0 entered promiscuous mode
[ 1377.369095] *sky2 0000:06:00.0: eth0: rx error, status 0x7ffc0001 
length 1468*
[ 1379.618257] device eth0 left promiscuous mode



Switch is a Netgear GS724Tv3 firmware 5.0.3.5


Cheers,
Niccolò

It could be that your switch doesn't do autonegotiation or flow
control. You are getting receive fifo overflow errors.