From 0ce12026d6ea4a24d52ddcde36b9643f2e26d560 Mon Sep 17 00:00:00 2001
From: Eliad Peller <eliad@wizery.com>
Date: Tue, 17 Jun 2014 13:07:02 +0300
Subject: cfg80211: fix elapsed_jiffies calculation

MAX_JIFFY_OFFSET has no meaning when calculating the
elapsed jiffies, as jiffies run out until ULONG_MAX.

This miscalculation results in erroneous values
in case of a wrap-around.

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
 net/wireless/core.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'net')

diff --git a/net/wireless/core.h b/net/wireless/core.h
index e9afbf10e756..7e3a3cef7df9 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -424,7 +424,7 @@ static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
 	if (end >= start)
 		return jiffies_to_msecs(end - start);
 
-	return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1);
+	return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
 }
 
 void
-- 
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