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selftests: timers: rtcpie: restore previous PIE rate

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After the test ends, restore the PIE rate to its previous value to be less
disruptive.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
This commit is contained in:
Alexandre Belloni 2018-04-19 14:50:28 +02:00 committed by Shuah Khan (Samsung OSG)
parent 843b20bcb8
commit 6d73ceab4d
1 changed files with 5 additions and 3 deletions
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8
tools/testing/selftests/timers/rtcpie.c
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@ -28,7 +28,7 @@ static const char default_rtc[] = "/dev/rtc0";
int main(int argc, char **argv)
{
int i, fd, retval, irqcount = 0;
unsigned long tmp, data;
unsigned long tmp, data, old_pie_rate;
const char *rtc = default_rtc;
struct timeval start, end, diff;
@ -51,7 +51,7 @@ int main(int argc, char **argv)
}
/* Read periodic IRQ rate */
retval = ioctl(fd, RTC_IRQP_READ, &tmp);
retval = ioctl(fd, RTC_IRQP_READ, &old_pie_rate);
if (retval == -1) {
/* not all RTCs support periodic IRQs */
if (errno == EINVAL) {
@ -61,7 +61,7 @@ int main(int argc, char **argv)
perror("RTC_IRQP_READ ioctl");
exit(errno);
}
fprintf(stderr, "\nPeriodic IRQ rate is %ldHz.\n", tmp);
fprintf(stderr, "\nPeriodic IRQ rate is %ldHz.\n", old_pie_rate);
fprintf(stderr, "Counting 20 interrupts at:");
fflush(stderr);
@ -124,6 +124,8 @@ int main(int argc, char **argv)
}
done:
ioctl(fd, RTC_IRQP_SET, old_pie_rate);
fprintf(stderr, "\n\n\t\t\t *** Test complete ***\n");
close(fd);