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[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>
This commit is contained in:
Abhilash Jindal 2016-01-31 03:47:31 -02:00 committed by Mauro Carvalho Chehab
parent 3801bc7d1b
commit 6b3f99989e
2 changed files with 6 additions and 6 deletions
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8
drivers/media/dvb-core/dvb_frontend.c
View File

@ -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);

4
drivers/media/dvb-frontends/stv0299.c
View File

@ -422,7 +422,7 @@ static int stv0299_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long
if (debug_legacy_dish_switch)
printk ("%s switch command: 0x%04lx\n",__func__, cmd);
nexttime = ktime_get_real();
nexttime = ktime_get_boottime();
if (debug_legacy_dish_switch)
tv[0] = nexttime;
stv0299_writeregI (state, 0x0c, reg0x0c | 0x50); /* set LNB to 18V */
@ -431,7 +431,7 @@ static int stv0299_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long
for (i=0; i<9; i++) {
if (debug_legacy_dish_switch)
tv[i+1] = ktime_get_real();
tv[i+1] = ktime_get_boottime();
if((cmd & 0x01) != last) {
/* set voltage to (last ? 13V : 18V) */
stv0299_writeregI (state, 0x0c, reg0x0c | (last ? lv_mask : 0x50));