From: David Fries <David@Fries.net>
Date: Thu, 16 Jan 2014 04:29:14 +0000 (-0600)
Subject: w1: Only wake up the search process if it is going to be searching
X-Git-Tag: next-20140306~20^2~82
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=af8c7237b082acefb996878a21a87017059b2c52;p=karo-tx-linux.git

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 67b6d5fb25bc..92766a9f8b4d 100644
--- 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;
 }