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Index: linux-3.1/drivers/cbus/tahvo.c
===================================================================
--- linux-3.1.orig/drivers/cbus/tahvo.c 2011-11-05 17:03:39.598846119 +0100
+++ linux-3.1/drivers/cbus/tahvo.c 2011-11-05 17:04:36.274768324 +0100
@@ -104,7 +104,9 @@ void tahvo_write_reg(struct device *chil
{
struct tahvo *tahvo = dev_get_drvdata(child->parent);
+ mutex_lock(&tahvo->mutex);
__tahvo_write_reg(tahvo, reg, val);
+ mutex_unlock(&tahvo->mutex);
}
EXPORT_SYMBOL(tahvo_write_reg);
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