ath9k: Handle power modes in isr for power save.

Restore network sleep mode in isr if power save is enabled.
Signed-off-by: NVivek Natarajan <vnatarajan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath9k/ath9k.h

@@ -677,7 +677,8 @@ static inline void ath9k_ps_wakeup(struct ath_softc *sc)
 static inline void ath9k_ps_restore(struct ath_softc *sc)
 {
 	if (atomic_dec_and_test(&sc->ps_usecount))
-		if (sc->hw->conf.flags & IEEE80211_CONF_PS)
+		if ((sc->hw->conf.flags & IEEE80211_CONF_PS) &&
+		    !(sc->sc_flags & SC_OP_WAIT_FOR_BEACON))
 			ath9k_hw_setpower(sc->sc_ah,
 					  sc->sc_ah->restore_mode);
 }

drivers/net/wireless/ath9k/main.c

@@ -516,6 +516,7 @@ irqreturn_t ath_isr(int irq, void *dev)
 			return IRQ_NONE;
 
 		sc->intrstatus = status;
+		ath9k_ps_wakeup(sc);
 
 		if (status & ATH9K_INT_FATAL) {
 			/* need a chip reset */
@@ -581,6 +582,7 @@ irqreturn_t ath_isr(int irq, void *dev)
 				sched = true;
 			}
 		}
+		ath9k_ps_restore(sc);
 	} while (0);
 
 	ath_debug_stat_interrupt(sc, status);