[patch 1/5] d80211: Fix overflow when creating AVS header

[David Kimdon <david.kimdon@devicescape.com>]

[-- Attachment #1: hosttime.patch --]
[-- Type: text/plain, Size: 1048 bytes --]

Fix overflow when converting timespec to microseconds.  Without this patch you
can get an overflow during the multiplication which can result in a negative number.
hostime is define here:

4.4 hosttime
The hosttime field is set to the current value of the host maintained
clock variable when the frame is received.

(from http://www.locustworld.com/tracker/getfile/prism2drivers/doc/capturefrm.txt)

it is a u64.

Signed-off-by: David Kimdon <david.kimdon@devicescape.com>

Index: wireless-dev/net/d80211/ieee80211.c
===================================================================
--- wireless-dev.orig/net/d80211/ieee80211.c
+++ wireless-dev/net/d80211/ieee80211.c
@@ -2573,7 +2573,7 @@ ieee80211_rx_mgmt(struct net_device *dev
 		struct ieee80211_rate *rate;
 
                 jiffies_to_timespec(status->hosttime, &ts);
-		fi->hosttime = cpu_to_be64(ts.tv_sec * 1000000 +
+		fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
 					   ts.tv_nsec / 1000);
 		fi->mactime = cpu_to_be64(status->mactime);
 		switch (status->phymode) {

--