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Revision 6e20fb18054c179d7e64c0af43d855b9310a3394 authored by Roland Stigge on 10 February 2011, 23:01:23 UTC, committed by Linus Torvalds on 12 February 2011, 00:12:20 UTC 
drivers/gpio/pca953x.c: add a mutex to fix race condition
 
Add a mutex to register communication and handling.  Without the mutex,
GPIOs didn't switch as expected when toggled in a fast sequence of
status changes of multiple outputs.

Signed-off-by: Roland Stigge <stigge@antcom.de>
Acked-by: Eric Miao <eric.y.miao@gmail.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Marc Zyngier <maz@misterjones.org>
Cc: Ben Gardner <bgardner@wabtec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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