From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kay Sievers Date: Fri, 31 Dec 2004 06:23:05 +0000 Subject: Re: Help with simple char device Message-Id: <1104474185.6801.14.camel@localhost.localdomain> List-Id: References: <1104471165.7269.10.camel@penguin.montes2.org> In-Reply-To: <1104471165.7269.10.camel@penguin.montes2.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-hotplug@vger.kernel.org On Thu, 2004-12-30 at 21:32 -0800, Luis A. Montes wrote: > Hi there, > > I'm trying to write a simple char device driver. I've used as starting > point code that someone posted recently to the list (I can't find the > post now, it was a file called mymod.c). Anyway, I do: > > alloc_chrdev_region() > cdev_alloc() > set owner and file operations > kobject_set_name() > cdev_add() > class_simple_create() > class_simple_device_add() > > It nicely creates a /dev/ entry, but it then complains: > > wait_for_sysfs[5689]: either wait_for_sysfs (udev 042) needs an update > to handle the device '/class/mydevclass/mydev' properly (no device > symlink) or the sysfs-support of your device's driver needs to be fixed, > please report to > > Any pointers to what else do I need to do? Just upgrade udev to get rid of the message or simply ignore it. (That's cause udev doesn't know about that class name and the default is to expect a symlink to the physical device. Newer udev versions will not print this message and kernel 2.6.10 will carry the information in the hotplug environment to let udev explicitly know what to wait for.) Kay ------------------------------------------------------- The SF.Net email is sponsored by: Beat the post-holiday blues Get a FREE limited edition SourceForge.net t-shirt from ThinkGeek. It's fun and FREE -- well, almost....http://www.thinkgeek.com/sfshirt _______________________________________________ Linux-hotplug-devel mailing list http://linux-hotplug.sourceforge.net Linux-hotplug-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel