ath9k: Stop ANI when doing a reset

The MIB counters are disabled when doing a chip reset.
Since ANI depends on the MIB registers for its operation, relying
on the contents of said registers during HW reset results in sub-optimal
performance.

Cc: stable@kernel.org
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/main.c

@@ -1973,6 +1973,9 @@ int ath_reset(struct ath_softc *sc, bool retry_tx)
 	struct ieee80211_hw *hw = sc->hw;
 	int r;
 
+	/* Stop ANI */
+	del_timer_sync(&common->ani.timer);
+
 	ath9k_hw_set_interrupts(ah, 0);
 	ath_drain_all_txq(sc, retry_tx);
 	ath_stoprecv(sc);
@@ -2014,6 +2017,9 @@ int ath_reset(struct ath_softc *sc, bool retry_tx)
 		}
 	}
 
+	/* Start ANI */
+	ath_start_ani(common);
+
 	return r;
 }