Re: Problem with new driver model?

[Brian Gerst]

Patrick Mochel wrote:
> 
> On 5 Jun 2002, Paul Fulghum wrote:
> 
> > When testing the drivers I maintain on 2.5.20, I hit the
> > BUG_ON in include/linux/devices.txt:115.
> 
> There is a patch that should fix this in Linus's tree.
> 
> If you're using bitkeeper, you can pull it from
> linux.bkbits.net/linux-2.5.
> 
> If not, it's appended here.
> 
>         -pat
> 
> +void remove_driver(struct device_driver * drv)
> +{
> +       spin_lock(&device_lock);
> +       atomic_set(&drv->refcount,0);
> +       spin_unlock(&device_lock);
> +       __remove_driver(drv);
> +}
> +
> +/**
> + * put_driver - decrement driver's refcount and clean up if necessary
> + * @drv:       driver in question
> + */
> +void put_driver(struct device_driver * drv)
> +{
> +       if (!atomic_dec_and_lock(&drv->refcount,&device_lock))
> +               return;
> +       spin_unlock(&device_lock);
> +
> +       __remove_driver(drv);
> +}

Shouldn't the calls to __remove_driver be done inside the device_lock?

--

				Brian Gerst