> >> I was wondering that while using dynamic device numner allocation, can > >> we ever have a scenario like following (using alloc_chrdev_region): > >> > >> 1) Char Driver A is hooked on Major num X, minor numbers 0-10 > >> 2) Char Driver B is hooked on (same) Major num X, minor numbers 11-20 > > So the above is actually possible? Yes, once you have a major number, you can separate out the minor numbers how ever you wish to.
Hi Greg, Ok, I understand that we can get a major number from the kernel and split it into a range of minor numbers. But does alloc_chrdev_region() reuse the major numbers in such a way? In other words, is the following scenario possible: Driver 1 ====== alloc_chrdev_region(10 minor nos required) -> receives major 150 (minor 0-9) Driver 2 ====== alloc_chrdev_region(20 minor nos required) -> receives major 150 (minor 10-29) Thanks, Rajat -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
