on 21/01/2009 17:39 Kostik Belousov said the following: > On Wed, Jan 21, 2009 at 05:03:20PM +0200, Andriy Gapon wrote: >> Do I need to code for MOD_UNLOAD for driver module that also creates a cdev? >> I see in the current code that one strategy is to simply call >> destroy_dev(). I guess detach routines are called automatically and >> destroy_dev can be done there as well.. > What are the detach routines ? Do you mean newbus device detach ?
Yes, device_detach. This seems to work and make_device_driver.sh also suggests it this way. But I am not sure about possible races. > Yes, the usual strategy is to call destroy_dev from unload handler. > >> Is it reasonable to refuse unload if cdev is in use (in MOD_QUIESCE)? >> How to check for that best? > > This cannot be checked race-free. So no point in trying? -- Andriy Gapon _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
