From: Greg KH <greg@kroah.com>
To: Joerg Pommnitz <pommnitz@yahoo.com>
Cc: linux-usb-users@lists.sourceforge.net, linux-kernel@vger.kernel.org
Subject: Re: Software based unplug of USB device?
Date: Mon, 3 May 2004 07:54:13 -0700 [thread overview]
Message-ID: <20040503145413.GA31691@kroah.com> (raw)
In-Reply-To: <20040503102120.23966.qmail@web41314.mail.yahoo.com>
On Mon, May 03, 2004 at 12:21:20PM +0200, Joerg Pommnitz wrote:
> Hello listees,
> we are struggling with a 3rd party USB device. It comes with its own
> firmware and its own Linux USB serial drivers.
Which device and driver is this? Do you have a pointer to the driver?
> Unfortunately the
> communication between the device and the user application seems to break
> down from time to time. This situation can easily be resolved by
> unplugging and then re-plugging the device. Unfortunately this requires
> manual intervention.
> While resolving the real issue would be the preferred way to deal with
> this problem, we would settle for a way to do a software unplug/re-plug.
Do you want to do this from within the kernel, or from userspace? If
from within the kernel, you should be able to drop the power to a hub
port and reenable it, but I haven't checked to see if that works in a
long time.
thanks,
greg k-h
next prev parent reply other threads:[~2004-05-03 14:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-03 10:21 Software based unplug of USB device? Joerg Pommnitz
2004-05-03 11:07 ` Duncan Sands
2004-05-03 14:54 ` Greg KH [this message]
2004-05-03 18:10 ` Johannes Erdfelt
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