Re: Linux Hotplug Question

On Fri, Nov 02, 2007 at 03:49:31PM +0000, Navin Anand wrote:
> Hi All,
> 
> I am new to development under Linux 2.6 ( 2.6.16). I have a driver
> that controls the input device like mouse and exports the USB data
> from the kernel to user space through a device that is created under
> /dev directory. I am trying to make hotplug feature available with my
> driver and having some issues. When I add the device it works fine,
> only When I unplug my device the kernel disconnects and deletes the
> /dev/myfile, while my user space code is accessing the same.
> 
> I will really appreciate if you could provide some input or
> information about how to make sure that hotplug works on Linux and if
> you could let me know any links or tutorials about the same.
> 
> I did try to google but not a lot of information how user space
> programs cope with hot plug.
> 
> My kernel driver for I/O is based on the usb-skeleton.c. This is work
> in progress for me and I used a simple kernel driver. On the user
> space all I do is a while loop to check and read the information from
> the /dev/myfile* files.

So your driver is working fine, but your userspace program is not
handling the device removal?

Do you have a pointer to the source for your driver?

thanks,

greg k-h

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