Invalid prescaler value is silently ignored. Fix that
by returning -EINVAL in such case. As invalid value
disabled use of the prescaler, use -1 explicitely for
that purpose.
Signed-off-by: Ladislav Michl <ladis@xxxxxxxxxxxxxx>
---
drivers/clocksource/timer-dm.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/clocksource/timer-dm.c b/drivers/clocksource/timer-dm.c
index ec3a28c90c70..95cd98be8541 100644
--- a/drivers/clocksource/timer-dm.c
+++ b/drivers/clocksource/timer-dm.c
@@ -609,6 +609,9 @@ static int omap_dm_timer_set_prescaler(struct omap_dm_timer *timer,
if (prescaler >= 0x00 && prescaler <= 0x07) {
l |= OMAP_TIMER_CTRL_PRE;
l |= prescaler << 2;
+ } else {
+ if (prescaler != -1)
+ return -EINVAL;
}
omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
--
2.15.1
--
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