[staging-next V3] ozwpan: fix memcmp() test in oz_set_active_pd()

[Tomas Winkler]

"addr" is a pointer so it's either 4 or 8 bytes, but actually we want
to compare 6 bytes (ETH_ALEN).

As network stack already provides helper function
is_zero_ether_addr() we use that instead of memcmp

Signed-off-by: Tomas Winkler <tomas.winkler at intel.com>
Cc: Dan Carpenter <dan.carpenter at oracle.com>
Cc: Rupesh Gujare <rgujare at ozmodevices.com>
---
V1: by Dan Carpenter <dan.carpenter at oracle.com>
V2: replace memcmp with is_zero_ether_addr
V3: include <linux/etherdevice.h>

 drivers/staging/ozwpan/ozcdev.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/staging/ozwpan/ozcdev.c b/drivers/staging/ozwpan/ozcdev.c
index d983219..758ce0a 100644
--- a/drivers/staging/ozwpan/ozcdev.c
+++ b/drivers/staging/ozwpan/ozcdev.c
@@ -8,6 +8,7 @@
 #include <linux/cdev.h>
 #include <linux/uaccess.h>
 #include <linux/netdevice.h>
+#include <linux/etherdevice.h>
 #include <linux/poll.h>
 #include <linux/sched.h>
 #include "ozconfig.h"
@@ -213,7 +214,7 @@ static int oz_set_active_pd(u8 *addr)
 		if (old_pd)
 			oz_pd_put(old_pd);
 	} else {
-		if (!memcmp(addr, "\0\0\0\0\0\0", sizeof(addr))) {
+		if (is_zero_ether_addr(addr)) {
 			spin_lock_bh(&g_cdev.lock);
 			pd = g_cdev.active_pd;
 			g_cdev.active_pd = 0;
-- 
1.7.4.4