Am Donnerstag, 27. März 2003 08:34 schrieb Duncan Sands:
> > driver core protects us with semaphores during probe/disconnect. We can
> > stop messing with the module usage counts.
>
> Hi Oliver, you are assuming
>
> (1) that usb_register is called within the module, and not on its behalf by
> eg a different module.
> (2) that there is a call to usb_deregister in the module's exit routine.
>
> These assumptions seem reasonable to me, but should maybe be documented.
Why? I propose the module usage count manipulations here because
the driver core has mutual exclusion through semaphores for these
operations.
Could you elaborate?
Also could you look at a possible race between usb_deregister
and ioctl through usbfs?
Regards
Oliver
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