Subject: [PATCH] ath9k: Fix bug in retrieving average beacon rssi

Signed-off-by: Vasanthakumar Thiagarajan <[email protected]>
---
drivers/net/wireless/ath/ath9k/ani.h | 7 +------
1 files changed, 1 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/ani.h b/drivers/net/wireless/ath/ath9k/ani.h
index 1199245..6273fd0 100644
--- a/drivers/net/wireless/ath/ath9k/ani.h
+++ b/drivers/net/wireless/ath/ath9k/ani.h
@@ -18,15 +18,10 @@
#define ANI_H

#define HAL_PROCESS_ANI 0x00000001
-#define ATH9K_RSSI_EP_MULTIPLIER (1<<7)

#define DO_ANI(ah) (((ah)->proc_phyerr & HAL_PROCESS_ANI))

-#define HAL_EP_RND(x, mul) \
- ((((x)%(mul)) >= ((mul)/2)) ? ((x) + ((mul) - 1)) / (mul) : (x)/(mul))
-#define BEACON_RSSI(ahp) \
- HAL_EP_RND(ahp->stats.ast_nodestats.ns_avgbrssi, \
- ATH9K_RSSI_EP_MULTIPLIER)
+#define BEACON_RSSI(ahp) (ahp->stats.ast_nodestats.ns_avgbrssi)

#define ATH9K_ANI_OFDM_TRIG_HIGH 500
#define ATH9K_ANI_OFDM_TRIG_LOW 200
--
1.5.5.1



2009-08-19 18:55:35

by Luis R. Rodriguez

[permalink] [raw]
Subject: Re: [ath9k-devel] [PATCH] ath9k: Fix bug in retrieving average beacon rssi

On Wed, Aug 19, 2009 at 3:53 AM, Vasanthakumar
Thiagarajan<[email protected]> wrote:
> Signed-off-by: Vasanthakumar Thiagarajan <[email protected]>

Vasanth, can you provide a little more description here on the commit
log as to what the issue was?

Luis

Subject: [PATCH] ath9k: Nuke struct ath9k_node_stats

Other than ns_avgbrssi (Average beacon rssi) no data of
ath9k_node_stats is being used anywhere. Nuke this structure
and move its only useful member to ar5416Anistate. Also cleanup
this redundant data in ath_softc.

Signed-off-by: Vasanthakumar Thiagarajan <[email protected]>
---
drivers/net/wireless/ath/ath9k/ani.c | 6 +-----
drivers/net/wireless/ath/ath9k/ani.h | 15 +++------------
drivers/net/wireless/ath/ath9k/ath9k.h | 1 -
drivers/net/wireless/ath/ath9k/main.c | 9 +++------
drivers/net/wireless/ath/ath9k/recv.c | 2 +-
5 files changed, 8 insertions(+), 25 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/ani.c b/drivers/net/wireless/ath/ath9k/ani.c
index f264097..a7cbb07 100644
--- a/drivers/net/wireless/ath/ath9k/ani.c
+++ b/drivers/net/wireless/ath/ath9k/ani.c
@@ -538,7 +538,6 @@ void ath9k_ani_reset(struct ath_hw *ah)
}

void ath9k_hw_ani_monitor(struct ath_hw *ah,
- const struct ath9k_node_stats *stats,
struct ath9k_channel *chan)
{
struct ar5416AniState *aniState;
@@ -550,7 +549,6 @@ void ath9k_hw_ani_monitor(struct ath_hw *ah,
return;

aniState = ah->curani;
- ah->stats.ast_nodestats = *stats;

listenTime = ath9k_hw_ani_get_listen_time(ah);
if (listenTime < 0) {
@@ -693,8 +691,7 @@ u32 ath9k_hw_GetMibCycleCountsPct(struct ath_hw *ah,
* any of the MIB counters overflow/trigger so don't assume we're
* here because a PHY error counter triggered.
*/
-void ath9k_hw_procmibevent(struct ath_hw *ah,
- const struct ath9k_node_stats *stats)
+void ath9k_hw_procmibevent(struct ath_hw *ah)
{
u32 phyCnt1, phyCnt2;

@@ -706,7 +703,6 @@ void ath9k_hw_procmibevent(struct ath_hw *ah,

/* Clear the mib counters and save them in the stats */
ath9k_hw_update_mibstats(ah, &ah->ah_mibStats);
- ah->stats.ast_nodestats = *stats;

if (!DO_ANI(ah))
return;
diff --git a/drivers/net/wireless/ath/ath9k/ani.h b/drivers/net/wireless/ath/ath9k/ani.h
index 6273fd0..4e1ab94 100644
--- a/drivers/net/wireless/ath/ath9k/ani.h
+++ b/drivers/net/wireless/ath/ath9k/ani.h
@@ -21,7 +21,7 @@

#define DO_ANI(ah) (((ah)->proc_phyerr & HAL_PROCESS_ANI))

-#define BEACON_RSSI(ahp) (ahp->stats.ast_nodestats.ns_avgbrssi)
+#define BEACON_RSSI(ahp) (ahp->stats.avgbrssi)

#define ATH9K_ANI_OFDM_TRIG_HIGH 500
#define ATH9K_ANI_OFDM_TRIG_LOW 200
@@ -60,13 +60,6 @@ struct ath9k_mib_stats {
u32 beacons;
};

-struct ath9k_node_stats {
- u32 ns_avgbrssi;
- u32 ns_avgrssi;
- u32 ns_avgtxrssi;
- u32 ns_avgtxrate;
-};
-
struct ar5416AniState {
struct ath9k_channel *c;
u8 noiseImmunityLevel;
@@ -110,21 +103,19 @@ struct ar5416Stats {
u32 ast_ani_reset;
u32 ast_ani_lzero;
u32 ast_ani_lneg;
+ u32 avgbrssi;
struct ath9k_mib_stats ast_mibstats;
- struct ath9k_node_stats ast_nodestats;
};
#define ah_mibStats stats.ast_mibstats

void ath9k_ani_reset(struct ath_hw *ah);
void ath9k_hw_ani_monitor(struct ath_hw *ah,
- const struct ath9k_node_stats *stats,
struct ath9k_channel *chan);
void ath9k_enable_mib_counters(struct ath_hw *ah);
void ath9k_hw_disable_mib_counters(struct ath_hw *ah);
u32 ath9k_hw_GetMibCycleCountsPct(struct ath_hw *ah, u32 *rxc_pcnt,
u32 *rxf_pcnt, u32 *txf_pcnt);
-void ath9k_hw_procmibevent(struct ath_hw *ah,
- const struct ath9k_node_stats *stats);
+void ath9k_hw_procmibevent(struct ath_hw *ah);
void ath9k_hw_ani_setup(struct ath_hw *ah);
void ath9k_hw_ani_init(struct ath_hw *ah);
void ath9k_hw_ani_disable(struct ath_hw *ah);
diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index 2c9f662..70bdd92 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -603,7 +603,6 @@ struct ath_softc {
int beacon_interval;

struct ath_ani ani;
- struct ath9k_node_stats nodestats;
#ifdef CONFIG_ATH9K_DEBUG
struct ath9k_debug debug;
#endif
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 2f9c149..f92b47d 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -384,7 +384,7 @@ static void ath_ani_calibrate(unsigned long data)
if (longcal || shortcal || aniflag) {
/* Call ANI routine if necessary */
if (aniflag)
- ath9k_hw_ani_monitor(ah, &sc->nodestats, ah->curchan);
+ ath9k_hw_ani_monitor(ah, ah->curchan);

/* Perform calibration if necessary */
if (longcal || shortcal) {
@@ -589,7 +589,7 @@ irqreturn_t ath_isr(int irq, void *dev)
* it will clear whatever condition caused
* the interrupt.
*/
- ath9k_hw_procmibevent(ah, &sc->nodestats);
+ ath9k_hw_procmibevent(ah);
ath9k_hw_set_interrupts(ah, sc->imask);
}

@@ -940,10 +940,7 @@ static void ath9k_bss_assoc_info(struct ath_softc *sc,
ath_beacon_config(sc, vif);

/* Reset rssi stats */
- sc->nodestats.ns_avgbrssi = ATH_RSSI_DUMMY_MARKER;
- sc->nodestats.ns_avgrssi = ATH_RSSI_DUMMY_MARKER;
- sc->nodestats.ns_avgtxrssi = ATH_RSSI_DUMMY_MARKER;
- sc->nodestats.ns_avgtxrate = ATH_RATE_DUMMY_MARKER;
+ sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;

ath_start_ani(sc);
} else {
diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c
index 61dbdd2..7b62c22 100644
--- a/drivers/net/wireless/ath/ath9k/recv.c
+++ b/drivers/net/wireless/ath/ath9k/recv.c
@@ -222,7 +222,7 @@ static int ath_rx_prepare(struct sk_buff *skb, struct ath_desc *ds,

/* Update Beacon RSSI, this is used by ANI. */
if (ieee80211_is_beacon(fc))
- sc->nodestats.ns_avgbrssi = ds->ds_rxstat.rs_rssi;
+ sc->sc_ah->stats.avgbrssi = ds->ds_rxstat.rs_rssi;

rx_status->mactime = ath_extend_tsf(sc, ds->ds_rxstat.rs_tstamp);
rx_status->band = hw->conf.channel->band;
--
1.5.5.1