From: Oliver Neukum <oliver@neukum.org>
To: Gernot Hillier <gernot@hillier.de>
Cc: Matthias Urlichs <smurf@smurf.noris.de>,
"Greg Kroah-Hartman" <gregkh@suse.de>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Add support for Mobilcom Debitel USB UMTS Surf-Stick to option driver
Date: Sun, 22 Nov 2009 09:20:16 +0100 [thread overview]
Message-ID: <200911220920.16717.oliver@neukum.org> (raw)
In-Reply-To: <4B08F18C.3040904@hillier.de>
Am Sonntag, 22. November 2009 09:08:44 schrieb Gernot Hillier:
> In addition, this device seems to ignore setting of RTS/DTR by option_send_
> setup and doesn't answer the usb_control_msg leading to a 5 s timeout
> (USB_CTRL_SET_TIMEOUT) in userspace open() and other operations. As this
> confused several impatient userspace applications like Minicom and
> ModemManager, I decided to reduce the timeout to more reasonable 1000 ms.
> I don't think the usual USB GSM stick needs longer, so this should be
> safe.
Unfortunately the 5s timeout comes from the USB spec for control
messages. So reducing it is a serious matter. In this case I'd prefer
if you introduce a special case for these devices and fail the operation
without doing any IO.
Regards
Oliver
next prev parent reply other threads:[~2009-11-22 8:20 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-22 8:08 [PATCH] Add support for Mobilcom Debitel USB UMTS Surf-Stick to option driver Gernot Hillier
2009-11-22 8:20 ` Oliver Neukum [this message]
2009-11-24 18:00 ` Gernot Hillier
2009-11-24 18:19 ` Oliver Neukum
2009-11-27 12:49 ` Gernot Hillier
2009-11-27 13:24 ` Matthias Urlichs
2009-11-27 18:11 ` Gernot Hillier
2009-11-27 18:53 ` Greg KH
2009-12-08 6:20 ` Gernot Hillier
2009-12-08 7:34 ` Matthias Urlichs
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