gspca core fixes

Hi Mauro,

Please pull from my tree for a number of gspca core fixes. While looking into the issue you were seeing with qv4l2 I also found a bug in the gspca core which made it impossible to switch from userptr to mmap mode with qv4l2 and gspca. While fixing that I also ended up fixing some locking issues. All the gspca core patches have been reviewed by J.F. Moine.

This pull request also includes a patch for removing all the bogus usb-ids from the et61x251 driver as discussed.

The following changes since commit 187134a5875df20356f4dca075db29f294115a47:

[media] DVB: IR support for TechnoTrend CT-3650 (2010-12-31 09:10:24 -0200)

are available in the git repository at:
git://linuxtv.org/hgoede/gspca.git for_v2.6.38

Hans de Goede (9):
gspca_main: Locking fixes 1
gspca_main: Locking fixes 2
gspca_main: Update buffer flags even when user_copy fails
gspca_main: Remove no longer used users variable
gspca_main: Set memory type to GSPCA_MEMORY_NO on buffer release
gspca_main: Simplify read mode memory type checks
gspca_main: Allow switching from read to mmap / userptr mode
gspca_main: wake wq on streamoff
et61x251: remove wrongly claimed usb ids

 drivers/media/video/et61x251/et61x251.h |   24 ----
 drivers/media/video/gspca/gspca.c       |  208 ++++++++++++++-----------------
 drivers/media/video/gspca/gspca.h       |    2 -
 3 files changed, 94 insertions(+), 140 deletions(-)

Regards,

Hans