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(parent: 31b729d) | patch
i2c: Prevent priority inversion on top of bus lock
authorMika Kuoppala <mika.kuoppala@nokia.com>
Sun, 6 Dec 2009 16:06:22 +0000 (17:06 +0100)
committerJean Delvare <khali@linux-fr.org>
Sun, 6 Dec 2009 16:06:22 +0000 (17:06 +0100)
commit763c8a1a2bcae660c6b9e43d180f300d94e9d923
tree1a6b0ede432e8c9fb4f7a1652deb71044ff9aa50tree | snapshot
parent31b729deb27baba9eb2149537d4f645515dd54d6commit | diff
i2c: Prevent priority inversion on top of bus lock

Low priority thread holding the i2c bus mutex could block higher
priority threads to access the bus resulting in unacceptable
latencies. Change the mutex type to rt_mutex preventing priority
inversion.

Tested-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@nokia.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
drivers/i2c/Kconfig diff | blob | history
drivers/i2c/i2c-core.c diff | blob | history
include/linux/i2c.h diff | blob | history
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