diff options
| author | Richard Purdie <rpurdie@rpsys.net> | 2007-02-08 22:25:09 +0000 |
|---|---|---|
| committer | Richard Purdie <rpurdie@rpsys.net> | 2007-02-20 08:38:45 +0000 |
| commit | 28ee086d5b36aab2931f6740e409bb0fb6c65e5f (patch) | |
| tree | 0a308c80affcc39c2c869f29f1109e5ee9d6140f /drivers/macintosh | |
| parent | a8db3c1948eb30cd6988b5b96b654f591e6280b1 (diff) | |
| download | linux-28ee086d5b36aab2931f6740e409bb0fb6c65e5f.tar.bz2 | |
backlight: Fix external uses of backlight internal semaphore
backlight_device->sem has a very specific use as documented in the
header file. The external users of this are using it for a different
reason, to serialise access to the update_status() method.
backlight users were supposed to implement their own internal
serialisation of update_status() if needed but everyone is doing
things differently and incorrectly. Therefore add a global mutex to
take care of serialisation for everyone, once and for all.
Locking for get_brightness remains optional since most users don't
need it.
Also update the lcd class in a similar way.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Diffstat (limited to 'drivers/macintosh')
| -rw-r--r-- | drivers/macintosh/via-pmu-backlight.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/macintosh/via-pmu-backlight.c b/drivers/macintosh/via-pmu-backlight.c index db8bcc35bc03..7ba2042b2dd0 100644 --- a/drivers/macintosh/via-pmu-backlight.c +++ b/drivers/macintosh/via-pmu-backlight.c @@ -166,11 +166,9 @@ void __init pmu_backlight_init() pmu_backlight_data.max_brightness / 15); } - down(&bd->sem); bd->props->brightness = level; bd->props->power = FB_BLANK_UNBLANK; - bd->props->update_status(bd); - up(&bd->sem); + backlight_update_status(bd); mutex_lock(&pmac_backlight_mutex); if (!pmac_backlight) |