Re: /dev entry of USB device not disappearing after detach

Adding linux-usb@vger...

On Fri, Feb 14, 2014 at 10:20:11AM -0800, Greg KH wrote:
> On Fri, Feb 14, 2014 at 07:35:31PM +0200, Valentina Manea wrote:
> > Hello,
> > 
> > I am working on a driver for a virtual USB host controller. When I attach a USB
> > device, everything is fine - sysfs files are created, /dev entry is
> > created, device is usable.
> > However, when I detach it, the /dev entry still remains. The sysfs
> > files are removed, as expected. Obviously, the /dev entry is no longer
> > usable, e.g. it can't be used for mounting.
> 
> What /dev entry are you referring to?
> 
> Did something have it held open while the device was still connected and
> hasn't closed it yet?

Also, the kernel is the one now responsible for managing the /dev node
creation/removal, through devtmpfs, there shouldn't be any "hotplug"
scripts involved in this process, so I doubt it's a userspace issue.

you do have CONFIG_DEVTMPFS enabled in your kernel, right?

thanks,

greg k-h
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