ISDN in 2.6.0-testX

From: Paolo Ornati
Date: Thu Dec 04 2003 - 08:38:05 EST

Is anyone working to get ISDN (hisax driver ;) work in 2.6.0-textX kernels?

My problem is a "totally kernel freeze" trying to load hisax module... this
happens in all 2.6.0-testX kernels.

My ISDN card: "Hamlet PCI ISDN CARD":

00:0d.0 Network controller: Cologne Chip Designs GmbH ISDN network
controller [HFC-PCI] (rev 02)
Subsystem: Cologne Chip Designs GmbH ISDN Board
Flags: bus master, medium devsel, latency 16, IRQ 5
I/O ports at 8400 [disabled] [size=8]
Memory at df000000 (32-bit, non-prefetchable) [size=256]
Capabilities: [40] Power Management version 1

My CONFIG: (2.6.0-testX)

# ISDN subsystem

# Old ISDN4Linux

# ISDN4Linux hardware drivers

# Passive cards

# D-channel protocol features

# HiSax supported cards

when I try to load the "hisax" module the kernel freezes, I can only push
the reset button.
The last line printed is "HFC_PCI: resetting card".

Using some "printk" I found the point where the freeze happens:

drivers/isdn/hisax/hfc_pci.c --> hfcpci_reset(struct IsdnCardState *cs)
/* Finally enable IRQ output */
cs->hw.hfcpci.int_m2 = HFCPCI_IRQ_ENABLE;
Write_hfc(cs, HFCPCI_INT_M2, cs->hw.hfcpci.int_m2); <-- HERE!
if (Read_hfc(cs, HFCPCI_INT_S2));

So the problem happens trying to enable IRQ on the ISDN Card....
Has anyone an idea of what can be wrong?
(The problem isn't about CONFIG_PREEMPT because I try with and without it).


Paolo Ornati
Linux v2.4.23

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