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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-09-09 14:47:41 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-09-09 14:47:41 -0700 |
| commit | daf6b9b68fca57effe3fcf74a8528f17516c420f (patch) | |
| tree | bd9d1c30fc943bfdc712d89de3081384b22115f4 | |
| parent | c4a6c70f93638821519047ba751b0145f7a9f90b (diff) | |
| parent | 8a2a835bbcaa6af0ec659606d3eabc23ccaaab80 (diff) | |
Merge tag 'pm-4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"This includes a PM QoS framework fix from Tejun to prevent interrupts
from being enabled unexpectedly during early boot and a cpufreq
documentation fix.
Specifics:
- If the PM QoS framework invokes cancel_delayed_work_sync() during
early boot, it will enable interrupts which is not expected at that
point, so prevent it from happening (Tejun Heo)
- Fix cpufreq statistic documentation to follow a recent change in
behavior that forgot to update it as appropriate (Jean Delvare)"
* tag 'pm-4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq-stats: Minor documentation fix
PM / QoS: avoid calling cancel_delayed_work_sync() during early boot
| -rw-r--r-- | Documentation/cpu-freq/cpufreq-stats.txt | 2 | ||||
| -rw-r--r-- | kernel/power/qos.c | 11 |
2 files changed, 11 insertions, 2 deletions
diff --git a/Documentation/cpu-freq/cpufreq-stats.txt b/Documentation/cpu-freq/cpufreq-stats.txt index fc647492e940..8d9773f23550 100644 --- a/Documentation/cpu-freq/cpufreq-stats.txt +++ b/Documentation/cpu-freq/cpufreq-stats.txt @@ -103,7 +103,7 @@ Config Main Menu Power management options (ACPI, APM) ---> CPU Frequency scaling ---> [*] CPU Frequency scaling - <*> CPU frequency translation statistics + [*] CPU frequency translation statistics [*] CPU frequency translation statistics details diff --git a/kernel/power/qos.c b/kernel/power/qos.c index 97b0df71303e..168ff442ebde 100644 --- a/kernel/power/qos.c +++ b/kernel/power/qos.c @@ -482,7 +482,16 @@ void pm_qos_update_request(struct pm_qos_request *req, return; } - cancel_delayed_work_sync(&req->work); + /* + * This function may be called very early during boot, for example, + * from of_clk_init(), where irq needs to stay disabled. + * cancel_delayed_work_sync() assumes that irq is enabled on + * invocation and re-enables it on return. Avoid calling it until + * workqueue is initialized. + */ + if (keventd_up()) + cancel_delayed_work_sync(&req->work); + __pm_qos_update_request(req, new_value); } EXPORT_SYMBOL_GPL(pm_qos_update_request); |