| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.4 109/177] cpuidle: use first valid target residency as poll time | Date | Mon, 16 Dec 2019 18:49:25 +0100 |
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From: Marcelo Tosatti <mtosatti@redhat.com>
commit 36fcb4292473cb9c9ce7706d038bcf0eda5cabeb upstream.
Commit 259231a04561 ("cpuidle: add poll_limit_ns to cpuidle_device structure") changed, by mistake, the target residency from the first available sleep state to the last available sleep state (which should be longer).
This might cause excessive polling.
Fixes: 259231a04561 ("cpuidle: add poll_limit_ns to cpuidle_device structure") Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Cc: 5.4+ <stable@vger.kernel.org> # 5.4+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/cpuidle/cpuidle.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/cpuidle/cpuidle.c +++ b/drivers/cpuidle/cpuidle.c @@ -384,6 +384,7 @@ u64 cpuidle_poll_time(struct cpuidle_dri continue; limit_ns = (u64)drv->states[i].target_residency * NSEC_PER_USEC; + break; } dev->poll_limit_ns = limit_ns;
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