Messages in this thread | | | From | Måns Rullgård <> | Subject | Re: Oops in register_chrdev, what did I do? | Date | Mon, 02 Aug 2004 10:15:05 +0200 |
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Tommy Reynolds <Tommy.Reynolds@MegaCoder.com> writes:
> Uttered Måns Rullgård <mru@kth.se>, spake thus: > >> While experimenting a bit with a small kernel module, I got this >> oops. Digging further, I found that /proc/devices had an entry saying >> 248 <NULL> >> which would indicate that I passed a NULL name to register_chrdev(), >> only I didn't. I used a string constant, so I can't see what changed >> it to NULL along the way. >> >> What am I missing here? > > Enough information for us to help you. Show us your code snippet, > please.
I can't imagine that the details of the fops functions are a problem, since they never get called.
static struct file_operations foo_fops = { .owner = THIS_MODULE, .open = foo_open, .read = foo_read, .write = foo_write, .mmap = foo_mmap, .release = foo_release };
static int __init init_foo(void) { int err;
err = register_chrdev(foo_major, "foo", &foo_fops); if(err) return err;
return 0; }
static void __exit exit_foo(void) { unregister_chrdev(foo_major, "foo"); }
module_init(init_foo); module_exit(exit_foo); MODULE_LICENSE("GPL");
-- Måns Rullgård mru@kth.se
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