From: Bruno Randolf <br1@einfach.org>
Date: Thu, 25 Mar 2010 05:49:09 +0000 (+0900)
Subject: ath5k: remove the use of SWI interrupt
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e65e1d7713da89d98f01c3f4267b2c9ecb03c16f;p=linux.git

ath5k: remove the use of SWI interrupt

We don't need to generate a software interrupt (SWI) just to schedule a tasklet
- we can just schedule the tasklet directly.

Rename constants, names, etc to reflect the fact that we don't use SWI any more.

Also move the flag handling into the tasklet and prepare it to behave correctly
when there are multiple flags present.

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

diff --git a/drivers/net/wireless/ath/ath5k/ath5k.h b/drivers/net/wireless/ath/ath5k/ath5k.h
index a3019ee4f2fa3..d84ccde111716 100644
--- a/drivers/net/wireless/ath/ath5k/ath5k.h
+++ b/drivers/net/wireless/ath/ath5k/ath5k.h
@@ -890,10 +890,10 @@ enum ath5k_int {
 	AR5K_INT_NOCARD	= 0xffffffff
 };
 
-/* Software interrupts used for calibration */
-enum ath5k_software_interrupt {
-	AR5K_SWI_FULL_CALIBRATION = 0x01,
-	AR5K_SWI_SHORT_CALIBRATION = 0x02,
+/* mask which calibration is active at the moment */
+enum ath5k_calibration_mask {
+	AR5K_CALIBRATION_FULL = 0x01,
+	AR5K_CALIBRATION_SHORT = 0x02,
 };
 
 /*
@@ -1102,8 +1102,8 @@ struct ath5k_hw {
 	/* Calibration timestamp */
 	unsigned long		ah_cal_tstamp;
 
-	/* Software interrupt mask */
-	u8			ah_swi_mask;
+	/* Calibration mask */
+	u8			ah_cal_mask;
 
 	/*
 	 * Function pointers
diff --git a/drivers/net/wireless/ath/ath5k/base.c b/drivers/net/wireless/ath/ath5k/base.c
index 39d5800172599..539a6d5415fdc 100644
--- a/drivers/net/wireless/ath/ath5k/base.c
+++ b/drivers/net/wireless/ath/ath5k/base.c
@@ -2507,7 +2507,7 @@ ath5k_init(struct ath5k_softc *sc)
 	sc->curband = &sc->sbands[sc->curchan->band];
 	sc->imask = AR5K_INT_RXOK | AR5K_INT_RXERR | AR5K_INT_RXEOL |
 		AR5K_INT_RXORN | AR5K_INT_TXDESC | AR5K_INT_TXEOL |
-		AR5K_INT_FATAL | AR5K_INT_GLOBAL | AR5K_INT_SWI;
+		AR5K_INT_FATAL | AR5K_INT_GLOBAL;
 	ret = ath5k_reset(sc, NULL);
 	if (ret)
 		goto done;
@@ -2673,9 +2673,6 @@ ath5k_intr(int irq, void *dev_id)
 			if (status & AR5K_INT_BMISS) {
 				/* TODO */
 			}
-			if (status & AR5K_INT_SWI) {
-				tasklet_schedule(&sc->calib);
-			}
 			if (status & AR5K_INT_MIB) {
 				/*
 				 * These stats are also used for ANI i think
@@ -2716,8 +2713,7 @@ ath5k_tasklet_calibrate(unsigned long data)
 	struct ath5k_hw *ah = sc->ah;
 
 	/* Only full calibration for now */
-	if (ah->ah_swi_mask != AR5K_SWI_FULL_CALIBRATION)
-		return;
+	ah->ah_cal_mask |= AR5K_CALIBRATION_FULL;
 
 	/* Stop queues so that calibration
 	 * doesn't interfere with tx */
@@ -2740,11 +2736,10 @@ ath5k_tasklet_calibrate(unsigned long data)
 			ieee80211_frequency_to_channel(
 				sc->curchan->center_freq));
 
-	ah->ah_swi_mask = 0;
-
 	/* Wake queues */
 	ieee80211_wake_queues(sc->hw);
 
+	ah->ah_cal_mask &= ~AR5K_CALIBRATION_FULL;
 }
 
 
diff --git a/drivers/net/wireless/ath/ath5k/phy.c b/drivers/net/wireless/ath/ath5k/phy.c
index 01b3f29ec13d0..075873f984288 100644
--- a/drivers/net/wireless/ath/ath5k/phy.c
+++ b/drivers/net/wireless/ath/ath5k/phy.c
@@ -1119,8 +1119,7 @@ ath5k_hw_calibration_poll(struct ath5k_hw *ah)
 	 * interrupt (bit gets auto-cleared) */
 	if (time_is_before_eq_jiffies(ah->ah_cal_tstamp + cal_intval)) {
 		ah->ah_cal_tstamp = jiffies;
-		ah->ah_swi_mask = AR5K_SWI_FULL_CALIBRATION;
-		AR5K_REG_ENABLE_BITS(ah, AR5K_CR, AR5K_CR_SWI);
+		tasklet_schedule(&ah->ah_sc->calib);
 	}
 }