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To: =?UTF-8?B?SGlua28gS2/EjWV2YXI=?= <hinko.kocevar@cetrtapot.si>
Cc: linux-kernel@vger.kernel.org
Subject: Re: register_chrdev vs. cdev_add 
From: corbet@lwn.net (Jonathan Corbet)
In-reply-to: Your message of "Wed, 14 May 2008 14:31:49 +0200."
             <482ADBB5.8050608@cetrtapot.si> 
Date: Wed, 14 May 2008 08:01:35 -0600
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> dev = MKDEV(htrc110_major, htrc110_minor);
> ret = register_chrdev_region(dev, 1, mod_name);
> ret = register_chrdev(dev, mod_name, &htrc110_fops);

If you want to use register_chrdev(), do not make a separate call to
register_chrdev_region().  Those two are not meant to work together.
register_chrdev() implicitly allocates a region of 256 minors for you.

jon