USB serial driver mct_u232 fails on second open

I am using a Belkin USB serial adapter, which is picked up by the mct_u232 driver. The first use attempt succeeds, but after closing and re-opening it, open() fails with -EINVAL. The kernel emits the following message:

mct_u232 ttyUSB0: usb_submit_urb(read bulk) failed pipe 0x40410880 err -22

I believe this to have been fixed upstream by the following commit from Linus' tree:

--------------------------------------------------------
commit 92ca0dc5ee022e4c0e488177e1d8865a0778c6c2
Author: Johan Hovold <email address hidden>
Date: Thu Oct 21 10:49:10 2010 +0200

    USB: mct_u232: fix broken close

    Fix regression introduced by commit
    f26788da3b342099d2b02d99ba1cb7f154d6ef7b (USB: serial: refactor generic
    close) which broke driver close().

    This driver uses non-standard semantics for the read urb which makes the
    generic close function fail to kill it (the read urb is actually an
    interrupt urb and therefore bulk_in size is zero).

    Reported-by: Eric Shattow "Eprecocious" <email address hidden>
    Tested-by: Eric Shattow "Eprecocious" <email address hidden>
    Cc: stable <email address hidden>
    Signed-off-by: Johan Hovold <email address hidden>
    Signed-off-by: Greg Kroah-Hartman <email address hidden>
--------------------------------------------------------

It has pushed into both linux-2.6.35 longterm and stable trees.

I will attempt to apply this patch and report if it fixes the issue.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-24-generic 2.6.35-24.42
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-24.42-generic 2.6.35.8
Uname: Linux 2.6.35-24-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: I82801BAICH2 [Intel 82801BA-ICH2], device 0: Intel ICH [Intel 82801BA-ICH2]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: david 1452 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'I82801BAICH2'/'Intel 82801BA-ICH2 with ALC200,200P at irq 17'
   Mixer name : 'Realtek ALC200,200P rev 0'
   Components : 'AC97a:414c4710'
   Controls : 19
   Simple ctrls : 19
Date: Thu Jan 20 15:52:47 2011
HibernationDevice: RESUME=UUID=3c509b00-0252-4a49-a581-2dfde642f2d0
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.
MachineType: Parallels Software International Inc. Parallels Virtual Platform
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-24-generic root=UUID=c9d2928a-7451-4113-b1cc-825d8fbb060c ro quiet splash
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.38
RfKill:

SourcePackage: linux
dmi.bios.date: 10/26/2007
dmi.bios.vendor: Parallels Software International Inc.
dmi.bios.version: 6.0.11992.625164
dmi.board.name: Parallels Virtual Platform
dmi.board.vendor: Parallels Software International Inc.
dmi.board.version: None
dmi.chassis.type: 2
dmi.chassis.vendor: Parallels Software International Inc.
dmi.modalias: dmi:bvnParallelsSoftwareInternationalInc.:bvr6.0.11992.625164:bd10/26/2007:svnParallelsSoftwareInternationalInc.:pnParallelsVirtualPlatform:pvrNone:rvnParallelsSoftwareInternationalInc.:rnParallelsVirtualPlatform:rvrNone:cvnParallelsSoftwareInternationalInc.:ct2:cvr:
dmi.product.name: Parallels Virtual Platform
dmi.product.version: None
dmi.sys.vendor: Parallels Software International Inc.