There is a warning in checkpatch script that triggers, when min and max
arguments of usleep_range_state() are in reverse order. This check does
only cover callsites which uses constants. Add this check into the code as
a WARN_ON_ONCE() to also cover callsites not using constants and fix the
miss usage by resetting the delta to 0.
Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de>
---
v3: Drop removal of checkpatch check, fix delta value
---
kernel/time/sleep_timeout.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/time/sleep_timeout.c b/kernel/time/sleep_timeout.c
index f3f246e4c8d1..3054e5232d20 100644
--- a/kernel/time/sleep_timeout.c
+++ b/kernel/time/sleep_timeout.c
@@ -364,6 +364,9 @@ void __sched usleep_range_state(unsigned long min, unsigned long max, unsigned i
ktime_t exp = ktime_add_us(ktime_get(), min);
u64 delta = (u64)(max - min) * NSEC_PER_USEC;
+ if (WARN_ON_ONCE(max < min))
+ delta = 0;
+
for (;;) {
__set_current_state(state);
/* Do not return before the requested sleep time has elapsed */
--
2.39.5