Merge tag 'pm-4.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:
 "These are mostly fixes, including some fixes for changes made during
  the recent merge window and some "stable" material, plus some minor
  extensions of the turbostat utility.

  Specifics:

   - Fix the PM core to avoid introducing a runtime PM usage counter
     imbalance when adding device links during driver probe (Rafael
     Wysocki).

   - Fix the operating performance points (OPP) framework to ensure that
     the regulator voltage is always updated as appropriate when
     updating clock rates (Waldemar Rymarkiewicz).

   - Fix the intel_pstate driver to use correct max/min limits for cores
     with differing maximum frequences (Srinivas Pandruvada).

   - Fix a typo in the intel_pstate driver documentation (Rafael
     Wysocki).

   - Fix two issues with the recently added Kryo cpufreq driver (Ilia
     Lin).

   - Fix two recent regressions and some other minor issues in the
     turbostat utility and extend it to provide some more diagnostic
     information (Len Brown, Nathan Ciobanu)"

* tag 'pm-4.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  Documentation: intel_pstate: Fix typo
  tools/power turbostat: version 18.06.20
  tools/power turbostat: add the missing command line switches
  tools/power turbostat: add single character tokens to help
  tools/power turbostat: alphabetize the help output
  tools/power turbostat: fix segfault on 'no node' machines
  tools/power turbostat: add optional APIC X2APIC columns
  tools/power turbostat: decode cpuid.1.HT
  tools/power turbostat: fix show/hide issues resulting from mis-merge
  PM / OPP: Update voltage in case freq == old_freq
  cpufreq: intel_pstate: Fix scaling max/min limits with Turbo 3.0
  cpufreq: kryo: Add module remove and exit
  cpufreq: kryo: Fix possible error code dereference
  PM / core: Fix supplier device runtime PM usage counter imbalance

1 files changed, 11 insertions, 4 deletions

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 36622b52e419..df3e1a44707a 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -236,6 +236,13 @@ struct device_link *device_link_add(struct device *consumer,
                         link->rpm_active = true;
                 }
                 pm_runtime_new_link(consumer);
+                /*
+                 * If the link is being added by the consumer driver at probe
+                 * time, balance the decrementation of the supplier's runtime PM
+                 * usage counter after consumer probe in driver_probe_device().
+                 */
+                if (consumer->links.status == DL_DEV_PROBING)
+                        pm_runtime_get_noresume(supplier);
         }
         get_device(supplier);
         link->supplier = supplier;
@@ -255,12 +262,12 @@ struct device_link *device_link_add(struct device *consumer,
                         switch (consumer->links.status) {
                         case DL_DEV_PROBING:
                                 /*
-                                 * Balance the decrementation of the supplier's
-                                 * runtime PM usage counter after consumer probe
-                                 * in driver_probe_device().
+                                 * Some callers expect the link creation during
+                                 * consumer driver probe to resume the supplier
+                                 * even without DL_FLAG_RPM_ACTIVE.
                                  */
                                 if (flags & DL_FLAG_PM_RUNTIME)
-                                        pm_runtime_get_sync(supplier);
+                                        pm_runtime_resume(supplier);
 
                                 link->status = DL_STATE_CONSUMER_PROBE;
                                 break;