ath5k: simplify MIB counters

Let's keep MIB counter statistics in our own statistics structure and only
convert it to ieee80211_low_level_stats when needed by mac80211. Also we don't
need to read profile count registers in the MIB interrupt (they don't trigger
MIB interrupts).

Signed-off-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 13 insertions, 26 deletions

diff --git a/drivers/net/wireless/ath/ath5k/pcu.c b/drivers/net/wireless/ath/ath5k/pcu.c
index 1b9fcb842167..c7c1fe023724 100644
--- a/drivers/net/wireless/ath/ath5k/pcu.c
+++ b/drivers/net/wireless/ath/ath5k/pcu.c
@@ -113,39 +113,26 @@ int ath5k_hw_set_opmode(struct ath5k_hw *ah, enum nl80211_iftype op_mode)
 }
 
 /**
- * ath5k_hw_update - Update mib counters (mac layer statistics)
+ * ath5k_hw_update - Update MIB counters (mac layer statistics)
  *
  * @ah: The &struct ath5k_hw
- * @stats: The &struct ieee80211_low_level_stats we use to track
- * statistics on the driver
  *
- * Reads MIB counters from PCU and updates sw statistics. Must be
- * called after a MIB interrupt.
+ * Reads MIB counters from PCU and updates sw statistics. Is called after a
+ * MIB interrupt, because one of these counters might have reached their maximum
+ * and triggered the MIB interrupt, to let us read and clear the counter.
+ *
+ * Is called in interrupt context!
  */
-void ath5k_hw_update_mib_counters(struct ath5k_hw *ah,
-                struct ieee80211_low_level_stats  *stats)
+void ath5k_hw_update_mib_counters(struct ath5k_hw *ah)
 {
-        ATH5K_TRACE(ah->ah_sc);
+        struct ath5k_statistics *stats = &ah->ah_sc->stats;
 
         /* Read-And-Clear */
-        stats->dot11ACKFailureCount += ath5k_hw_reg_read(ah, AR5K_ACK_FAIL);
-        stats->dot11RTSFailureCount += ath5k_hw_reg_read(ah, AR5K_RTS_FAIL);
-        stats->dot11RTSSuccessCount += ath5k_hw_reg_read(ah, AR5K_RTS_OK);
-        stats->dot11FCSErrorCount += ath5k_hw_reg_read(ah, AR5K_FCS_FAIL);
-
-        /* XXX: Should we use this to track beacon count ?
-         * -we read it anyway to clear the register */
-        ath5k_hw_reg_read(ah, AR5K_BEACON_CNT);
-
-        /* Reset profile count registers on 5212*/
-        if (ah->ah_version == AR5K_AR5212) {
-                ath5k_hw_reg_write(ah, 0, AR5K_PROFCNT_TX);
-                ath5k_hw_reg_write(ah, 0, AR5K_PROFCNT_RX);
-                ath5k_hw_reg_write(ah, 0, AR5K_PROFCNT_RXCLR);
-                ath5k_hw_reg_write(ah, 0, AR5K_PROFCNT_CYCLE);
-        }
-
-        /* TODO: Handle ANI stats */
+        stats->ack_fail += ath5k_hw_reg_read(ah, AR5K_ACK_FAIL);
+        stats->rts_fail += ath5k_hw_reg_read(ah, AR5K_RTS_FAIL);
+        stats->rts_ok += ath5k_hw_reg_read(ah, AR5K_RTS_OK);
+        stats->fcs_error += ath5k_hw_reg_read(ah, AR5K_FCS_FAIL);
+        stats->beacons += ath5k_hw_reg_read(ah, AR5K_BEACON_CNT);
 }
 
 /**