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ath5k: optimize ath5k_hw_calibration_poll

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

Signed-off-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Bruno Randolf 2010-03-25 14:49:14 +09:00 committed by John W. Linville
parent e65e1d7713
commit a9167f9642
2 changed files with 7 additions and 15 deletions
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2
drivers/net/wireless/ath/ath5k/ath5k.h
View File

@ -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;

20
drivers/net/wireless/ath/ath5k/phy.c
View File

@ -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)