diff options
| author | Abhilash Jindal <klock.android@gmail.com> | 2016-01-31 03:47:31 -0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2016-02-01 13:35:29 -0200 |
| commit | 6b3f99989eb73e5250bba9dfeaa852939acfbf70 (patch) | |
| tree | 40c75abc134fa5d7660a8096859e24547b2b5727 /drivers/media/dvb-core/dvb_frontend.c | |
| parent | 3801bc7d1b8dd70d47a92e58d6fb5653c10b7c95 (diff) | |
| download | linux-6b3f99989eb73e5250bba9dfeaa852939acfbf70.tar.bz2 | |
[media] dvb-frontend: Use boottime
Wall time obtained from ktime_get_real is susceptible to sudden jumps due to
user setting the time or due to NTP. Boot time is constantly increasing time
better suited for comparing two timestamps.
[mchehab@osg.samsung.com: fix trivial merge conflicts]
Signed-off-by: Abhilash Jindal <klock.android@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/dvb-core/dvb_frontend.c')
| -rw-r--r-- | drivers/media/dvb-core/dvb_frontend.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/media/dvb-core/dvb_frontend.c b/drivers/media/dvb-core/dvb_frontend.c index 40080645341e..03cc508b8c42 100644 --- a/drivers/media/dvb-core/dvb_frontend.c +++ b/drivers/media/dvb-core/dvb_frontend.c @@ -899,10 +899,10 @@ void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec) s32 delta; *waketime = ktime_add_us(*waketime, add_usec); - delta = ktime_us_delta(ktime_get_real(), *waketime); + delta = ktime_us_delta(ktime_get_boottime(), *waketime); if (delta > 2500) { msleep((delta - 1500) / 1000); - delta = ktime_us_delta(ktime_get_real(), *waketime); + delta = ktime_us_delta(ktime_get_boottime(), *waketime); } if (delta > 0) udelay(delta); @@ -2451,7 +2451,7 @@ static int dvb_frontend_ioctl_legacy(struct file *file, u8 last = 1; if (dvb_frontend_debug) printk("%s switch command: 0x%04lx\n", __func__, swcmd); - nexttime = ktime_get_real(); + nexttime = ktime_get_boottime(); if (dvb_frontend_debug) tv[0] = nexttime; /* before sending a command, initialize by sending @@ -2462,7 +2462,7 @@ static int dvb_frontend_ioctl_legacy(struct file *file, for (i = 0; i < 9; i++) { if (dvb_frontend_debug) - tv[i+1] = ktime_get_real(); + tv[i+1] = ktime_get_boottime(); if ((swcmd & 0x01) != last) { /* set voltage to (last ? 13V : 18V) */ fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18); |