Re: device module auto loading fix

[Adam Hamsik <haaaad%gmail.com@localhost>]

Hi,

> Hi folks,
>
> I tried to look at issue reported by nicholas (kernel panic during  
> cd boot).
> And I found that there areat least two bugs which lead to this panic.
>
> 1) [bc]dev_open
>
> In spec_open [1] we try to open device and when open function fails  
> with
> ENXIO which means that device was not found in a list, we try to  
> autoload
> it. Problem is that wecan get ENXIO even when driver is already  
> present in
> kernel. This is issue reported by nicholas. Attached diff adds new  
> only in
> kernel errno ENODEVSW which is reported by [bc]dev_open routine when
> [bc]dev_lookup function fails.
>
> To be clear here I do not need to add new errno, what I need is  
> distinguish
> between error in bdev_lookup and device open routine.

I haven't received any comments to this patch. I would like to commit  
this patch
soon so if you have any pleas speak up.

Attachment: specfs.diff
Description: Binary data

P.S I would like to commit cd.diff to but I'm not comfortable with  
that code so it would
    be better if someone else with more knowledge can commit/fix  
booting from cd on -current.

Attachment: cd.diff
Description: Binary data

Regards

Adam.