[sane-devel] Re: scanner.o modules

[Sergey Vlasov]

On Fri, 14 Mar 2003 08:57:57 +0100
Lars Täuber <taeu...@bbaw.de> wrote:

> how come that the scanner.o module (e.g. 2.4.20) is not automatically 
> loaded (after depmod -a ) when i have the following line in my modules.conf:
> 
> alias char-major-180-48 scanner

This won't work (at least with 2.4.20). Use hotplug scripts, or load
the module explicitly during boot.

This is from linux-2.4.20/drivers/usb/usb.c:

static int usb_open(struct inode * inode, struct file * file)
{
        int minor = MINOR(inode->i_rdev);
        struct usb_driver *c = usb_minors[minor/16];
        int err = -ENODEV;
        struct file_operations *old_fops, *new_fops = NULL;

        /*
         * No load-on-demand? Randy, could you ACK that it's really not
         * supposed to be done?                                 -- AV
         */
        if (!c || !(new_fops = fops_get(c->fops)))
                return err;