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ALSA: intel8x0: Use ktime and ktime_get()

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do_posix_clock_monotonic_gettime() is a leftover from the initial
posix timer implementation which maps to ktime_get_ts() and returns
the monotonic time in a timespec.

Use ktime based ktime_get() and use the ktime_delta_us() function to
calculate the delta instead of open coding the timespec math.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Thomas Gleixner 2014-06-11 23:59:15 +00:00 committed by Takashi Iwai
parent 26204e048d
commit 2afe8be85c
1 changed files with 4 additions and 6 deletions
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10
sound/pci/intel8x0.c
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@ -2779,7 +2779,7 @@ static void intel8x0_measure_ac97_clock(struct intel8x0 *chip)
unsigned long port;
unsigned long pos, pos1, t;
int civ, timeout = 1000, attempt = 1;
struct timespec start_time, stop_time;
ktime_t start_time, stop_time;
if (chip->ac97_bus->clock != 48000)
return; /* specified in module option */
@ -2813,7 +2813,7 @@ static void intel8x0_measure_ac97_clock(struct intel8x0 *chip)
iputbyte(chip, port + ICH_REG_OFF_CR, ICH_IOCE);
iputdword(chip, ICHREG(ALI_DMACR), 1 << ichdev->ali_slot);
}
do_posix_clock_monotonic_gettime(&start_time);
start_time = ktime_get();
spin_unlock_irq(&chip->reg_lock);
msleep(50);
spin_lock_irq(&chip->reg_lock);
@ -2837,7 +2837,7 @@ static void intel8x0_measure_ac97_clock(struct intel8x0 *chip)
pos += ichdev->position;
}
chip->in_measurement = 0;
do_posix_clock_monotonic_gettime(&stop_time);
stop_time = ktime_get();
/* stop */
if (chip->device_type == DEVICE_ALI) {
iputdword(chip, ICHREG(ALI_DMACR), 1 << (ichdev->ali_slot + 16));
@ -2865,9 +2865,7 @@ static void intel8x0_measure_ac97_clock(struct intel8x0 *chip)
}
pos /= 4;
t = stop_time.tv_sec - start_time.tv_sec;
t *= 1000000;
t += (stop_time.tv_nsec - start_time.tv_nsec) / 1000;
t = ktime_us_delta(stop_time, start_time);
dev_info(chip->card->dev,
"%s: measured %lu usecs (%lu samples)\n", __func__, t, pos);
if (t == 0) {