Commit f6e8a1d7 authored Feb 19, 2012 by NeilBrown Committed by Greg Kroah-Hartman Feb 24, 2012

w1_bq27000: Only one thread can access the bq27000 at a time.



If multiple threads try, they trip over each other badly.

Signed-off-by: NeilBrown <neilb@suse.de>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent df7019f3

drivers/w1/slaves/w1_bq27000.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -31,8 +31,10 @@ static int w1_bq27000_read(struct device *dev, unsigned int reg)
		u8 val;
		struct w1_slave *sl = container_of(dev->parent, struct w1_slave, dev);

		mutex_lock(&sl->master->mutex);
		w1_write_8(sl->master, HDQ_CMD_READ \| reg);
		val = w1_read_8(sl->master);
		mutex_unlock(&sl->master->mutex);

		return val;
		}