re: devsw_detach is failing -- is this a manifestation of PR kern/56962?

[matthew green <mrg%eterna.com.au@localhost>]

your change seems to fix a clear but to me.

> -		if (*bmajor < 0)
> +		if ((bdev != NULL) && (*bmajor < 0)) 
>  			*bmajor = conv->d_bmajor;

there's also this line i'm curious about, just below:

                if (*bmajor != conv->d_bmajor || *cmajor != conv->d_cmajor) {
                        error = EINVAL;
                        goto out;

should the first part also depend upon either bdev != NULL or
perhaps (*bmajor >= 0 && bdev == NULL) as the following code
uses...


.mrg.