On Wed, 1 Jun 2005, Dmitry Torokhov wrote: > On 6/1/05, Alan Stern <[EMAIL PROTECTED]> wrote: > > Using a private semaphore for synchronization, > > you can guarantee that dev.driver_data is NULL whenever your driver is > > bound to the interface and the private data doesn't exist. > > BTW, you can't use private semaphore... Well, you can as long as it is > driver-wide semaphore, i.e. statically allocated one. Otherwise you > will free the semaphore together with acecad structure it is embedded > into in disconnect method.
Yes, that's what I meant. Since attributes acquire a reference to the driver's module while they are open, there's no danger of userspace accessing a stale attribute or trying to refer to the static semaphore after the driver has been unloaded. Alan Stern ------------------------------------------------------- This SF.Net email is sponsored by Yahoo. Introducing Yahoo! Search Developer Network - Create apps using Yahoo! Search APIs Find out how you can build Yahoo! directly into your own Applications - visit http://developer.yahoo.net/?fr=offad-ysdn-ostg-q22005 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
