From: Greg KH <gregkh@linuxfoundation.org>
To: linux-hotplug@vger.kernel.org
Subject: Re: /dev entry of USB device not disappearing after detach
Date: Fri, 14 Feb 2014 18:21:33 +0000 [thread overview]
Message-ID: <20140214182133.GF16421@kroah.com> (raw)
In-Reply-To: <CABdoFFfdXunfN+q1wJWGJbh9UGzD+9z9257ZXMM_qDhg3X8zTQ@mail.gmail.com>
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
next prev parent reply other threads:[~2014-02-14 18:21 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-14 17:35 /dev entry of USB device not disappearing after detach Valentina Manea
2014-02-14 18:20 ` Greg KH
2014-02-14 18:21 ` Greg KH [this message]
2014-02-15 12:38 ` Valentina Manea
2014-02-15 16:52 ` Greg KH
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