Hello, I want to write a simple device driver that will be controlled by IOCTLs from user space. These IOCTLs will operate on /dev/myDev file , which will represent a character device; I know that I can register a char device by register_chrdev(MY_MAJOR_NUM, "mymodule", &mymodule_fops);The thing is that this binds me to a specific major number for the device (MY_MAJOR_NUM). Suppose I will choose an arbitrary number, say 300, for MY_MAJOR_NUM. Then,if this module will be run on a machine on which this major number is held by a diffrent driver (from let's say some different device) , than I will be unable to work with my driver ; since 300 (MY_MAJOR_NUM) , which I had chosen as MY_MAJOR_NUM, will be held by a different driver ,so register_chrdev() will fail.
Is there a way to avoid using a specific major number and use some dynamic mechanism which will give me a free char device for /dev/myDev? Rgs, Rgs, Kevin Wilson -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to [email protected] Please read the FAQ at http://kernelnewbies.org/FAQ
