[PATCH] net:wireless:Add proper locking for the function, b43_op_beacon_set_tim in main.c

[Nicholas Krause <xerofoify@gmail.com>]

Adds proper locking for the function, b43_op_beacon_set_tim in main.c that internally calls b43_update_templates.
Due to the function that is being called internally,b43_update_templates needing the mutex lock of the structure
pointer wl passed  it to run successfully and without issues we add the calls to mutex_lock before and mutex_unlock
after it's call internally in b43_op_beacon_set_tim in order to allow the function,,b43_update_templates to run
successfully and without issues related to concurrent access.

Signed-off-by: Nicholas Krause <xerofoify@gmail.com>
---
 drivers/net/wireless/b43/main.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index 47731cb..b807958 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -5094,8 +5094,9 @@ static int b43_op_beacon_set_tim(struct ieee80211_hw *hw,
 {
 	struct b43_wl *wl = hw_to_b43_wl(hw);
 
-	/* FIXME: add locking */
+	mutex_lock(&wl->mutex);
 	b43_update_templates(wl);
+	mutex_unlock(&wl->mutex);
 
 	return 0;
 }
-- 
2.1.0