2.4.2 cs4232 is not SMP safe

[Olaf Hering]

Hi,

the current cs4232 driver is not smp safe, I get this in dmesg when I
try to load it:

ad1848/cs4248 codec driver Copyright (C) by Hannu Savolainen 1993-1996
<Crystal audio controller (CS4236)> at 0x534 irq 5 dma 1,0
do_IRQ waiting for irq lock (holder=0)

wait_on_irq, CPU 0:
irq:  1 [0 1]
bh:   0 [0 0]

It jumps into xmon and I can exit from the debugger. 
A spin_lock(&mylock) call in attach_cs4232() leads to that output:

ad1848/cs4248 codec driver Copyright (C) by Hannu Savolainen 1993-1996
<Crystal audio controller (CS4236)> at 0x534 irq 5 dma 1,0
do_IRQ waiting for irq lock (holder=1)

But it still jumps into xmon. How can we make that driver SMP safe?
There is no maintainer address in the files.

cantaloupe:~ # lsmod
Module                  Size  Used by
cs4232                  3376   0  (unused)
ad1848                 24288   0  [cs4232]
uart401                 7152   0  [cs4232]
sound                  73920   0  [cs4232 ad1848 uart401]
soundcore               4784   4  [sound]
nfsd                   76928   4  (autoclean)
autofs                 13136   4  (autoclean)
appletalk              28384  13  (autoclean)
ipv6                  204704  -1  (autoclean)

Gruss Olaf

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