w1: Only wake up the search process if it is going to be searching

It's valid to set the search count to 0 to stop searching, so don't
wake up the search thread to not search.

Signed-off-by: David Fries <David@Fries.net>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c
index 67b6d5fb25bc35f7d41e0e17ca4f7ad1168cf12c..92766a9f8b4d71e69314edcfd682c1edf9071f00 100644 (file)
--- a/drivers/w1/w1.c
+++ b/drivers/w1/w1.c
@@ -243,7 +243,9 @@ static ssize_t w1_master_attribute_store_search(struct device * dev,
        mutex_lock(&md->mutex);
        md->search_count = tmp;
        mutex_unlock(&md->mutex);
-       wake_up_process(md->thread);
+       /* Only wake if it is going to be searching. */
+       if (tmp)
+               wake_up_process(md->thread);
 
        return count;
 }