pwc driver ctrl events + fixes + pac207 exposure fix

Hi Mauro,

Please pull from my tree for the pwc ctrl-event changes + various fixes as well as the long expected pac207 exposure fix:

The following changes since commit 9e9e52f85fac877344e1a5bf92b41c5450a8d2e5:

vivi: let vb2_poll handle events. (2011-10-06 14:45:26 +0200)

are available in the git repository at:
git://linuxtv.org/hgoede/gspca.git media-for_v3.2

Hans de Goede (7):
pwc: Add support for control events
pwc: properly mark device_hint as unused in all probe error paths
pwc: Make auto white balance speed and delay available as v4l2 controls
pwc: rework locking
pwc: poll(): Check that the device has not beem claimed for streaming already
pwc: read new preset values when changing awb control to a preset
gspca_pac207: Raise max exposure + various autogain setting tweaks

 drivers/media/video/gspca/pac207.c  |   10 +-
 drivers/media/video/pwc/pwc-ctrl.c  |  134 +++++++++++++++---------------
 drivers/media/video/pwc/pwc-dec23.c |    7 ++
 drivers/media/video/pwc/pwc-dec23.h |    2 +
 drivers/media/video/pwc/pwc-if.c    |  155 ++++++++++++++++++-----------------
 drivers/media/video/pwc/pwc-v4l.c   |  155 ++++++++++++++++++++++++-----------
 drivers/media/video/pwc/pwc.h       |   11 ++-
 7 files changed, 275 insertions(+), 199 deletions(-)

Thanks & Regards,

Hans