[PATCH] ath9k: remove unneeded variable

[Ding Xiang]

"len" is unneeded,just return 0

Signed-off-by: Ding Xiang <dingxiang@xxxxxxxxxxxxxxxxxxxx>
---
 drivers/net/wireless/ath/ath9k/gpio.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/gpio.c b/drivers/net/wireless/ath/ath9k/gpio.c
index b457e52..f3d1bc0 100644
--- a/drivers/net/wireless/ath/ath9k/gpio.c
+++ b/drivers/net/wireless/ath/ath9k/gpio.c
@@ -498,14 +498,13 @@ static int ath9k_dump_legacy_btcoex(struct ath_softc *sc, u8 *buf, u32 size)
 {
 
 	struct ath_btcoex *btcoex = &sc->btcoex;
-	u32 len = 0;
 
 	ATH_DUMP_BTCOEX("Stomp Type", btcoex->bt_stomp_type);
 	ATH_DUMP_BTCOEX("BTCoex Period (msec)", btcoex->btcoex_period);
 	ATH_DUMP_BTCOEX("Duty Cycle", btcoex->duty_cycle);
 	ATH_DUMP_BTCOEX("BT Wait time", btcoex->bt_wait_time);
 
-	return len;
+	return 0;
 }
 
 int ath9k_dump_btcoex(struct ath_softc *sc, u8 *buf, u32 size)
-- 
1.9.1