[IrDA] Oops with NULL deref in irda_device_set_media_busy

[Michal Rokos <michal@rokos.info>]

Hello,

I've problems with IrDA - when debug is off, I'm getting oops for obvious 
reason...
(I don't have a log, this is just rewrite from screen:
EIP: irda_device_set_media_busy+0x15/0x40 [irda]
ali_ircc_sir_receive+0x4a/0x70
ali_ircc_sir_interrupt+0x66/0x70
ali_ircc_interrupt+0x5e/0x80
.....
)
When I turn debug on, I get just
Assertion failed! net/irda/irda_device.c:irda_device_set_media_busy:128 
self != NULL

The obvious reason is that I don't have irlap module in that inits 
dev->atalk_ptr, so I'm getting assertion exception in irda_device.c:489.

A few info that could be handy:

$ uname -a # It's yesterday bk snapshot
Linux csas 2.6.12-rc1-mr #14 Mon Apr 4 13:42:14 CEST 2005 i686 GNU/Linux

$ lsmod | grep ir
ircomm_tty             39176  3
ircomm                 22404  1 ircomm_tty
ali_ircc               26032  0
irda                  192316  3 ircomm_tty,ircomm,ali_ircc
crc_ccitt               2176  2 ppp_async,irda

$ grep IR .config
CONFIG_IRDA=m
# CONFIG_IRLAN is not set
CONFIG_IRNET=m
CONFIG_IRCOMM=m
CONFIG_IRDA_ULTRA=y
CONFIG_IRDA_CACHE_LAST_LSAP=y
CONFIG_IRDA_FAST_RR=y
CONFIG_IRDA_DEBUG=y
# SIR device drivers
# CONFIG_IRTTY_SIR is not set
# Old SIR device drivers
# CONFIG_IRPORT_SIR is not set
# FIR device drivers
# CONFIG_USB_IRDA is not set
# CONFIG_SIGMATEL_FIR is not set
# CONFIG_NSC_FIR is not set
# CONFIG_WINBOND_FIR is not set
# CONFIG_TOSHIBA_FIR is not set
# CONFIG_SMC_IRCC_FIR is not set
CONFIG_ALI_FIR=m
# CONFIG_VLSI_FIR is not set
# CONFIG_VIA_FIR is not set
# CONFIG_USB_SERIAL_IR is not set

 Michal