Network problem on HP 735/99 with Linux 2.6 [solved]

[HPRichard]

Hello altogether,

I recently updated my HP workstation (HP9000 735/99) to hppa-sources-2.6.10-p11 as suggested by portage. With the new kernel i cannot get the network interface running (which uses the lasi_82596 driver). I use the standard BNC daughterboard from HP.

The problem looks like being interrupt-related, as I get the following messages with Linux 2.6

Feb 2 19:14:07 hp LASI 82596 driver - Revision: 1.30
Feb 2 19:14:07 hp Found i82596 at 0xf0826000, IRQ 17
Feb 2 19:14:07 hp drivers/net/lasi_82596.c: MAC of HP700 LAN read from EEPROM
Feb 2 19:14:07 hp eth0: 82596 at 0xf0826000, 08 00 09 49 85 F2 IRQ 17.
Feb 2 19:14:14 hp eth0: IRQ 17 not free

and indeed interrupt 17 is occupied, as shown in /proc/interrupts

CPU0
2: 0 EISA cascade
16: 3236 GSC-ASIC 2:0:1
17: 0 GSC-ASIC HP SDC NMI
18: 88416 GSC-ASIC HP SDC
19: 9 GSC-ASIC serial
21: 0 GSC-ASIC parport0
25: 0 GSC-ASIC EISA
64: 33855 CPU timer
67: 91616 CPU asp

but the strange thing is that with Linux 2.4 (hppa-sources-2.4.26-p4) the distribution of interrupts is completely different

CPU00
2: 0 EISA cascade
32: 25720 PARISC-CPU timer
35: 146720 PARISC-CPU asp
82: 0 Cutoff harmony
85: 0 Cutoff EISA
86: 3831 Cutoff lasi700
87: 39 Cutoff i82596
88: 0 Cutoff parport0
90: 8 Cutoff serial
93: 0 Cutoff HP SDC NMI
94: 142870 Cutoff HP SDC

I tried the lasi_82596 both built-in and as module, both had no sucess. Can I load the driver using a different IRQ, or is there any other way getting the network interface run?

[HPRichard]

I just read this
http://wiki.parisc-linux.org/Interrupts
and just installed hppa-sources-2.6.10-pa2 as this is the latest version in portage before the introduction of the new interrupt code. With this kernel, the network interface works, an the interrupts are allocated as with hppa-sources-2.4.26-p4.
It looks like the new interrupt code allocating some interrupts twice under certian circumstances.
Anyone with similar experiences?

[HPRichard]

I just installed linux-2.6.11-pa2 from http://cvs.parisc-linux.org/download/linux-2.6/, and all works without any problems. I seems like some minor issues with the new interrupt code have been wiped out.