Re: [BUG] cdc-acm driver module

["vijay anand" <vijayanand.sj@gmail.com>]

Hi Oliver,

Thank you very much for replying.

Given below is the snip from '\linux-2.6.25\drivers\usb\core\driver.c'
for 'usb_driver_release_interface'

****SNIP*****
 * This can be used by drivers to release an interface without waiting
 * for their disconnect() methods to be called.  In typical cases this
 * also causes the driver disconnect() method to be called.
****END*****

What happens when the function 'usb_deregister' in 'acm_exit'  gets
called before the control reaches the 'acm_disconnect'? Is there any
possibility for this? If yes what happens during this scenario?

Thanks,
VJ



On Wed, May 21, 2008 at 6:55 PM, Oliver Neukum <oliver@neukum.org> wrote:
> Am Mittwoch 21 Mai 2008 15:01:21 schrieb vijay anand:
>> What happens when the control never reaches the 'acm_disconnect'. Like simply
>> loading the driver and unloading the driver when the device is still in use.
>
> Even in this case disconnect() will be called.
> The only time it will not be called is if probe() was never called. But
> in that case no interface has been claimed. All is well.
>
>        Regards
>                Oliver
>