PM-runtime: Fix autosuspend_delay on 32bits arch

[linux-2.6-microblaze.git] / drivers / base / power / runtime.c

diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 7062469..457be03 100644 (file)
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -121,7 +121,7 @@ static void pm_runtime_cancel_pending(struct device *dev)
  * Compute the autosuspend-delay expiration time based on the device's
  * power.last_busy time.  If the delay has already expired or is disabled
  * (negative) or the power.use_autosuspend flag isn't set, return 0.
- * Otherwise return the expiration time in jiffies (adjusted to be nonzero).
+ * Otherwise return the expiration time in nanoseconds (adjusted to be nonzero).
  *
  * This function may be called either with or without dev->power.lock held.
  * Either way it can be racy, since power.last_busy may be updated at any time.
@@ -141,7 +141,7 @@ u64 pm_runtime_autosuspend_expiration(struct device *dev)
 
        last_busy = READ_ONCE(dev->power.last_busy);
 
-       expires = last_busy + autosuspend_delay * NSEC_PER_MSEC;
+       expires = last_busy + (u64)autosuspend_delay * NSEC_PER_MSEC;
        if (expires <= now)
                expires = 0;    /* Already expired. */
 
@@ -525,7 +525,7 @@ static int rpm_suspend(struct device *dev, int rpmflags)
                                 * We add a slack of 25% to gather wakeups
                                 * without sacrificing the granularity.
                                 */
-                               u64 slack = READ_ONCE(dev->power.autosuspend_delay) *
+                               u64 slack = (u64)READ_ONCE(dev->power.autosuspend_delay) *
                                                    (NSEC_PER_MSEC >> 2);
 
                                dev->power.timer_expires = expires;
@@ -905,7 +905,10 @@ static enum hrtimer_restart  pm_suspend_timer_fn(struct hrtimer *timer)
        spin_lock_irqsave(&dev->power.lock, flags);
 
        expires = dev->power.timer_expires;
-       /* If 'expire' is after 'jiffies' we've been called too early. */
+       /*
+        * If 'expires' is after the current time, we've been called
+        * too early.
+        */
        if (expires > 0 && expires < ktime_to_ns(ktime_get())) {
                dev->power.timer_expires = 0;
                rpm_suspend(dev, dev->power.timer_autosuspends ?