Commit a9167f96 authored by Bruno Randolf's avatar Bruno Randolf Committed by John W. Linville
Browse files

ath5k: optimize ath5k_hw_calibration_poll 



Optimize ath5k_hw_calibration_poll() since it is called on every singe
interrupt.

Signed-off-by: default avatarBruno Randolf <br1@einfach.org>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent e65e1d77

drivers/net/wireless/ath/ath5k/ath5k.h

+1 −1
Original line number Diff line number Diff line
@@ -1100,7 +1100,7 @@ struct ath5k_hw { 
	s32			ah_noise_floor;



	/* Calibration timestamp */

	unsigned long		ah_cal_tstamp;

	unsigned long		ah_cal_next_full;



	/* Calibration mask */

	u8			ah_cal_mask;

drivers/net/wireless/ath/ath5k/phy.c

+6 −14
Original line number Diff line number Diff line
@@ -1105,22 +1105,14 @@ int ath5k_hw_channel(struct ath5k_hw *ah, struct ieee80211_channel *channel) 
void

ath5k_hw_calibration_poll(struct ath5k_hw *ah)

{

	/* Calibration interval in jiffies */

	unsigned long cal_intval;



	cal_intval = msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_FULL);



	/* Initialize timestamp if needed */

	if (!ah->ah_cal_tstamp)

		ah->ah_cal_tstamp = jiffies;



	/* For now we always do full calibration

	 * Mark software interrupt mask and fire software

	 * interrupt (bit gets auto-cleared) */

	if (time_is_before_eq_jiffies(ah->ah_cal_tstamp + cal_intval)) {

		ah->ah_cal_tstamp = jiffies;

	if (time_is_before_eq_jiffies(ah->ah_cal_next_full)) {

		ah->ah_cal_next_full = jiffies +

			msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_FULL);

		tasklet_schedule(&ah->ah_sc->calib);

	}

	/* we could use SWI to generate enough interrupts to meet our

	 * calibration interval requirements, if necessary:

	 * AR5K_REG_ENABLE_BITS(ah, AR5K_CR, AR5K_CR_SWI); */

}



static int sign_extend(int val, const int nbits)

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