Hi,
Since v2.6.37 (BKL removal), trying to open a cx88-blackbird driven
MPEG device would hang. Ben Hutchings provided an initial patch[1] to
fix that, and Andi Huber helped a lot in finding races that patch had
missed. Ben requested that I take authorship of the series, so I've
done so.
These patches have visited the list twice before[2], towards the
beginning of this month. No feedback from maintainers or reviewers
--- I'm beginning to wonder if I have the right list. Luckily two
people[3][4] experiencing this problem on bugzilla were kind enough to
test the series and found it worked okay.
Patches are against v2.6.38 (but they do not conflict with anything in
media-tree/staging/for_v2.6.40). The intent is to include them in
v2.6.40 if possible. A copy of these patches is also available for
convenient fetching from
git://repo.or.cz/linux-2.6/jrn.git cx88-locking
Thoughts?
Jonathan Nieder (7):
[media] cx88: protect per-device driver list with device lock
[media] cx88: fix locking of sub-driver operations
[media] cx88: hold device lock during sub-driver initialization
[media] cx88: protect cx8802_devlist with a mutex
[media] cx88: gracefully reject attempts to use unregistered
cx88-blackbird driver
[media] cx88: don't use atomic_t for core->mpeg_users
[media] cx88: don't use atomic_t for core->users
drivers/media/video/cx88/cx88-blackbird.c | 41 +++++++++++++++-------------
drivers/media/video/cx88/cx88-dvb.c | 2 +
drivers/media/video/cx88/cx88-mpeg.c | 40 ++++++++++++++++++----------
drivers/media/video/cx88/cx88-video.c | 5 ++-
drivers/media/video/cx88/cx88.h | 11 +++++--
5 files changed, 61 insertions(+), 38 deletions(-)
[1] http://bugs.debian.org/619827
[2] http://thread.gmane.org/gmane.linux.kernel/1118815
[3] https://bugzilla.kernel.org/show_bug.cgi?id=31792
[4] https://bugzilla.kernel.org/show_bug.cgi?id=31962
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