RE: Question about Hot device Identity

["Guo, Min" <min.guo@intel.com>]

Oh, could you please give me an example USB device that udev supported now?

I tried another USB cdrom, I found there are no dev  file in /sysfs/class directory.

Whether I need patch kernel.org/pub/linux/kernel/people/gregkh/misc/kobject-hotplug-?-2.5.67.patch
for USB cdrom?   

I would like to develop the test suite for Udev firstly, thank you for your kind help.

Thanks
Guo Min



-----Original Message-----
From: Greg KH [mailto:greg@kroah.com]
Sent: Wednesday, June 25, 2003 12:21 AM
To: Guo, Min
Cc: linux-hotplug-devel@lists.sourceforge.net
Subject: Re: Question about Hot device Identity


On Tue, Jun 24, 2003 at 03:01:21PM +0800, Guo, Min wrote:
> Thanks a lot!
> I am now playing with your udev:-), and I encounter some problems.
> 
> I use a usb mouse as a PnP devices, after I mount sysfs, I can not
> find any devices in /sysfs/devices/pci0/00:0f.2 as
> DEVPATH=/devices/pci0/00:09.0/usb1/1-1/1-1.1/ttyUSB7 in the test file
> udev supplied.
> 
> 	00:0f.2 is my USB controller,
> 
> 	ls /sysfs/devices/pci0/00:0f.2 
> 	
> 		class   irq   power     subsystem_device  vendor
> 		device  name  resource  subsystem_vendor
> 
> So I think the configuration files you given out is for usb hub,is
> that right? For the common USB mouse, can I only configure
> DEVPATH=/sysfs/devices/pci0/00:0f.2? I tried this,but no results.
> Could you please tell me what cause this problem?

What problem?  udev only creates dev entries for things that show up in
/sys/class/* that have a file called "dev" in them.  Right now, there is
no kernel support for mice under /sys/class/ (but there was a patch
proposed for this posted to linux-kernel by Hanna Linder a few weeks
ago.)

Because of this, udev will not work for your mouse right now, sorry.

So right now my main focus has been providing support in the kernel for
/sys/class for all types of devices, as that is what udev needs.  Help
with this effort is greatly appreciated.

thanks,

gre k-h


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