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author | Richard Purdie <rpurdie@rpsys.net> | 2007-02-08 22:25:09 +0000 |
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committer | Richard Purdie <rpurdie@rpsys.net> | 2007-02-20 08:38:45 +0000 |
commit | 28ee086d5b36aab2931f6740e409bb0fb6c65e5f (patch) | |
tree | 0a308c80affcc39c2c869f29f1109e5ee9d6140f /drivers/net/tulip/timer.c | |
parent | a8db3c1948eb30cd6988b5b96b654f591e6280b1 (diff) | |
download | op-kernel-dev-28ee086d5b36aab2931f6740e409bb0fb6c65e5f.zip op-kernel-dev-28ee086d5b36aab2931f6740e409bb0fb6c65e5f.tar.gz |
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/net/tulip/timer.c')
0 files changed, 0 insertions, 0 deletions