Re: Question on how to get custom kernel module to work with udev

[Terry Barnaby <terry1@beam.ltd.uk>]

Terry Barnaby wrote:
> Hi,
> 
> I have a custom kernel device driver module for a PCI hardware device 
> that I would like
> to integrate with UDEV to get UDEV to generate the /dev nodes.
> 
> I am using Fedora Core 3.
> I have not been able to make this work so far, so any ideas ?
> 
> When the device is loaded /sbin/hotplug is called with the environment:
> 
> export SUBSYSTEM=drivers
> export DEVPATH=/bus/pci/drivers/admxrc2
> export PATH=/sbin:/bin:/usr/sbin:/usr/bin
> export ACTION­d
> export PWD=/
> export SHLVL=1
> export HOME=/
> export SEQNUMx5
> export _=/bin/env
> 
> I have added a file /etc/udev/rules.d/40-admxrc.rules with the contents:
> 
> KERNEL="admxrc2", NAME="admxrcii%k"
> SYSFS{vendor}="0x4144", NAME="admxrciii%k"
> 
> The two line are alternate versions for testing.
> 
> I have tried setting the udev config parameter "udev_log" to "yes" and
> do get logs when other drivers are loaded. However when I do a
> "rmmod admxrc2; modprobe admxrc2" no log information is printed.
> 
> 1. Is there a way to get more debug information out of udev ?
> 2. Is there some special thing I need to do in the device module ?
> 3. Is there something wround with the configuration ?
> 
> Cheers
> 
> Terry
> 
> 
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Some more information on this:

I have enabled debugiing in the udev sources and now see an error displayed
in the /var/log/messages file:

Jun  3 14:31:07 beam1 udev[15275]: main: looking at '/bus/pci/drivers/admxrc2'
Jun  3 14:31:07 beam1 udev[15275]: main: not a block or class device

This seems to sugest that I need to do something specific in the device
driver module to get udev to work ???

Terry



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