diff options
| author | Vincent Guittot <vincent.guittot@linaro.org> | 2019-01-10 10:00:40 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-01-10 10:55:52 +0100 |
| commit | ca27e4cd0bdd87e33fda38e6e3d18d36d54356d4 (patch) | |
| tree | 49bd82769e80a8965b392052f744057830aefa9a | |
| parent | 1f7b7081568bca281f4ef42096206180cfaced00 (diff) | |
PM-runtime: Fix autosuspend_delay on 32bits arch
Cast autosuspend_delay to u64 to make sure that the full computation
of 'expires' or slack will be done in u64, even on 32bits arch.
Otherwise, any delay greater than 2^31 nsec can overflow if signed
32bits is used when converting delay from msec to nsec.
Fixes: 8234f6734c5d (PM-runtime: Switch autosuspend over to using hrtimers)
Reported-by: Tony Lindgren <tony@atomide.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/base/power/runtime.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c index a282e74d1a16..457be03b744d 100644 --- a/drivers/base/power/runtime.c +++ b/drivers/base/power/runtime.c @@ -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; |