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(parent: 68a436a) | patch
w1: disable irqs in critical section
authorJan Weitzel <j.weitzel@phytec.de>
Wed, 2 Nov 2011 20:40:02 +0000 (13:40 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 2 Nov 2011 23:07:03 +0000 (16:07 -0700)
commit3fd306c85adcde7209281cb663dd8ea247e97cc3
tree67bd829e0ef4e8e350af7fd06e4936bec616b49atree | snapshot
parent68a436aec345c2bcd05dbdafae1f5f608ff8f61fcommit | diff
w1: disable irqs in critical section

Interrupting w1_delay() in w1_read_bit() results in missing the low level
on the w1 line and receiving "1" instead of "0".

Add local_irq_save()/local_irq_restore() around the critical section

Signed-off-by: Jan Weitzel <j.weitzel@phytec.de>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/w1/w1_io.c diff | blob | history
Domain: System / Kernel;