linux-kernel - Re: [PATCH 0/2] usb: serial: handle -ENODEV and -EPROTO quietly

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Message-ID: <20141216114614.GI6778@localhost>
Date:	Tue, 16 Dec 2014 12:46:14 +0100
From:	Johan Hovold <johan@...nel.org>
To:	Jeremiah Mahler <jmmahler@...il.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Johan Hovold <johan@...nel.org>, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] usb: serial: handle -ENODEV and -EPROTO quietly

On Mon, Dec 15, 2014 at 11:10:37PM -0800, Jeremiah Mahler wrote:

> Perhaps something at a lower level could return a more apt error number
> such as -ENODEV.  Then there would be no conflict with -EPROTO.

I'm afraid it's not possible to differentiate between a disconnected and
malfunctioning device in that short window before the disconnect is
reported and processes by the hub driver.

> I will look in to it again and re-submit the patches.

Let's see what comes out of this discussion first.

Thanks,
Johan
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