From: Johan Hovold <jhovold@gmail.com>
Date: Wed, 17 Mar 2010 22:05:56 +0000 (+0100)
Subject: USB: serial: clean up read processing in generic driver
X-Git-Tag: v2.6.35-rc1~471^2~188
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0f3d5bae2bdacce6c6c1d116809d6b3d50338df7;p=pandora-kernel.git

USB: serial: clean up read processing in generic driver

Always process and flush read urb, but only resubmit when not throttled.
The new tty-layer supply plenty of slack so there is really no need to
cache and delay processing of a single urb while throttled.

Note that unthrottle now submits using GFP_KERNEL as we are not in
atomic context (so there is no need to save irq state either).

Note also that the process_read_urb function could be added to
usb_serial_driver should any driver need to do any device specific
processing.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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