8139too & APIC incompatibility (2.6.0-test6-mm1, 2.4.20)

[Andreas Schwarz]

When APIC is activated, the following messages appear in syslog from
time to time:                                                                   
                                                                                
kernel: NETDEV WATCHDOG: eth1: transmit timed out
kernel: eth1: Tx queue start entry 4  dirty entry 0.
kernel: eth1:  Tx descriptor 0 is 00002000. (queue head)
kernel: eth1:  Tx descriptor 1 is 00002000.
kernel: eth1:  Tx descriptor 2 is 00002000.
kernel: eth1:  Tx descriptor 3 is 00002000.
kernel: eth1: link up, 100Mbps, full-duplex, lpa 0x45E1

After this has happened the first time, the card fails to send or
receive any more packages.

The problem exists in both tested Kernel versions (2.6.0-test6-mm1 and
2.4.20).

lspci -v:

00:0f.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
        Subsystem: Realtek Semiconductor Co., Ltd. RT8139
        Flags: bus master, medium devsel, latency 64, IRQ 5
        I/O ports at d400 [size=256]
        Memory at cfffde00 (32-bit, non-prefetchable) [size=256]
        Expansion ROM at cffe0000 [disabled] [size=64K]
        Capabilities: [50] Power Management version 2


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