unregister_chrdev() call from [linux\fs.h] used to return 0 if successful and <0 other wise. But now, in newer kernel versions, the return value of the function has been changed to void so it no longer returns any thing.
Question: Is there any way to find out if the unregister_chrdev() call was successful or not?
The return of void was done by changeset: e53252d97e670a38b1d2e9723b48077bba11ddda
commit e53252d97e670a38b1d2e9723b48077bba11ddda
Author: Akinobu Mita
Date: Thu Jul 19 01:47:51 2007 -0700
unregister_chrdev() return void
unregister_chrdev() does not return meaningful value. This patch makes it
return void like most unregister_* functions.
In fact if you look at the code before (from 2.6.12-rc2 onwards) you can see it always returned 0 so this is a function that is always expected to succeed.
