V4L/DVB (9668): em28xx: fix a race condition with hald

Gitweb:     http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=818a557eeb9c16a9a2dc93df348b0ff68fbc487f
Commit:     818a557eeb9c16a9a2dc93df348b0ff68fbc487f
Parent:     cce257109f534b4954a5d04aa4ba6905f4682f93
Author:     Mauro Carvalho Chehab <mchehab <at> redhat.com>
AuthorDate: Thu Nov 20 10:30:26 2008 -0300
Committer:  Mauro Carvalho Chehab <mchehab <at> redhat.com>
CommitDate: Thu Nov 20 18:12:02 2008 -0200

    V4L/DVB (9668): em28xx: fix a race condition with hald

    Newer versions of hald tries to open it to call QUERYCAP.

    Due to the lack of a proper locking, it is possible to open the device
    before it finishes initialization.

    This patch adds a lock to avoid this risk, and to protect the list of
    em28xx devices.

    While here, remove the uneeded BKL lock.

    Signed-off-by: Mauro Carvalho Chehab <mchehab <at> redhat.com>
---
 drivers/media/video/em28xx/em28xx-video.c |  128 +++++++++++++++++------------
 1 files changed, 75 insertions(+), 53 deletions(-)

diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c
index c32fc7d..90a11b5 100644
--- a/drivers/media/video/em28xx/em28xx-video.c
+++ b/drivers/media/video/em28xx/em28xx-video.c
@@ -73,6 +73,7 @@ MODULE_DESCRIPTION(DRIVER_DESC);