Re: [IrDA] Oops with NULL deref in irda_device_set_media_busy

[Jean Tourrilhes <jt@hpl.hp.com>]

On Tue, Apr 05, 2005 at 11:02:26AM +0200, Michal Rokos wrote:
> 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.

	I'm unclear here. The default IrDA stack intitialise properly
dev->atalk_ptr in every case, and is not expected to work if you
don't. I don't understand why dev->atalk_ptr would not be initialised,
is it something you did or something specific to the mr kernel (I only
test mainline kernels).

> 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

	Have fun...

	Jean