ath9k: Avoid HW opmode overridden on monitor mode changes

The HW opmode is blindly set to monitor type on monitor mode
change notification. This overrides the opmode when one of the
interfaces is still running as non-monitor iftype. So the monitoring
information needs to be maintained seperately.

Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

4 files changed, 23 insertions, 8 deletions

diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index cc13ee117823..c3a49045986d 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -952,9 +952,12 @@ static void ath9k_hw_set_operating_mode(struct ath_hw *ah, int opmode)
                 REG_SET_BIT(ah, AR_CFG, AR_CFG_AP_ADHOC_INDICATION);
                 break;
         case NL80211_IFTYPE_STATION:
-        case NL80211_IFTYPE_MONITOR:
                 REG_WRITE(ah, AR_STA_ID1, val | AR_STA_ID1_KSRCH_MODE);
                 break;
+        default:
+                if (ah->is_monitoring)
+                        REG_WRITE(ah, AR_STA_ID1, val | AR_STA_ID1_KSRCH_MODE);
+                break;
         }
 }
 
@@ -1634,7 +1637,6 @@ void ath9k_hw_beaconinit(struct ath_hw *ah, u32 next_beacon, u32 beacon_period)
 
         switch (ah->opmode) {
         case NL80211_IFTYPE_STATION:
-        case NL80211_IFTYPE_MONITOR:
                 REG_WRITE(ah, AR_NEXT_TBTT_TIMER, TU_TO_USEC(next_beacon));
                 REG_WRITE(ah, AR_NEXT_DMA_BEACON_ALERT, 0xffff);
                 REG_WRITE(ah, AR_NEXT_SWBA, 0x7ffff);
@@ -1663,6 +1665,14 @@ void ath9k_hw_beaconinit(struct ath_hw *ah, u32 next_beacon, u32 beacon_period)
                         AR_TBTT_TIMER_EN | AR_DBA_TIMER_EN | AR_SWBA_TIMER_EN;
                 break;
         default:
+                if (ah->is_monitoring) {
+                        REG_WRITE(ah, AR_NEXT_TBTT_TIMER,
+                                        TU_TO_USEC(next_beacon));
+                        REG_WRITE(ah, AR_NEXT_DMA_BEACON_ALERT, 0xffff);
+                        REG_WRITE(ah, AR_NEXT_SWBA, 0x7ffff);
+                        flags |= AR_TBTT_TIMER_EN;
+                        break;
+                }
                 ath_print(ath9k_hw_common(ah), ATH_DBG_BEACON,
                           "%s: unsupported opmode: %d\n",
                           __func__, ah->opmode);
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index d032939768b0..d47d1b4b6002 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -622,6 +622,7 @@ struct ath_hw {
 
         bool sw_mgmt_crypto;
         bool is_pciexpress;
+        bool is_monitoring;
         bool need_an_top2_fixup;
         u16 tx_trig_level;
 
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index b52f1cf8a603..cf6fa54a2fa3 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1217,6 +1217,7 @@ static int ath9k_start(struct ieee80211_hw *hw)
                 ah->imask |= ATH9K_INT_CST;
 
         sc->sc_flags &= ~SC_OP_INVALID;
+        sc->sc_ah->is_monitoring = false;
 
         /* Disable BMISS interrupt when we're not associated */
         ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
@@ -1493,8 +1494,7 @@ static int ath9k_add_interface(struct ieee80211_hw *hw,
         ath9k_hw_set_interrupts(ah, ah->imask);
 
         if (vif->type == NL80211_IFTYPE_AP    ||
-            vif->type == NL80211_IFTYPE_ADHOC ||
-            vif->type == NL80211_IFTYPE_MONITOR) {
+            vif->type == NL80211_IFTYPE_ADHOC) {
                 sc->sc_flags |= SC_OP_ANI_RUN;
                 ath_start_ani(common);
         }
@@ -1644,8 +1644,12 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
                 if (conf->flags & IEEE80211_CONF_MONITOR) {
                         ath_print(common, ATH_DBG_CONFIG,
-                                  "HW opmode set to Monitor mode\n");
-                        sc->sc_ah->opmode = NL80211_IFTYPE_MONITOR;
+                                  "Monitor mode is enabled\n");
+                        sc->sc_ah->is_monitoring = true;
+                } else {
+                        ath_print(common, ATH_DBG_CONFIG,
+                                  "Monitor mode is disabled\n");
+                        sc->sc_ah->is_monitoring = false;
                 }
         }
 
diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c
index fddb0129bb57..c76ea53c20ce 100644
--- a/drivers/net/wireless/ath/ath9k/recv.c
+++ b/drivers/net/wireless/ath/ath9k/recv.c
@@ -441,7 +441,7 @@ u32 ath_calcrxfilter(struct ath_softc *sc)
          */
         if (((sc->sc_ah->opmode != NL80211_IFTYPE_AP) &&
              (sc->rx.rxfilter & FIF_PROMISC_IN_BSS)) ||
-            (sc->sc_ah->opmode == NL80211_IFTYPE_MONITOR))
+            (sc->sc_ah->is_monitoring))
                 rfilt |= ATH9K_RX_FILTER_PROM;
 
         if (sc->rx.rxfilter & FIF_CONTROL)
@@ -897,7 +897,7 @@ static bool ath9k_rx_accept(struct ath_common *common,
                  * decryption and MIC failures. For monitor mode,
                  * we also ignore the CRC error.
                  */
-                if (ah->opmode == NL80211_IFTYPE_MONITOR) {
+                if (ah->is_monitoring) {
                         if (rx_stats->rs_status &
                             ~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC |
                               ATH9K_RXERR_CRC))