Power management fixes for v4.14-rc3

- Fix a deadlock in the operating performance points (OPP)
    framework caused by a notifier callback taking a lock that's
    already held by its caller (Viresh Kumar).
 
  - Prevent the ti-cpufreq and cpufreq-dt-platdev drivers from
    attempting to register conflicting device objects which
    triggers a warning from sysfs (Suniel Mahesh).
 
  - Drop a stale reference to a piece of intel_pstate documentation
    that's not in the tree any more (Rafael Wysocki).
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2
 
 iQIcBAABCAAGBQJZzVhfAAoJEILEb/54YlRxG1EQAJT3sG6InKIntxApvNG4o2fM
 0zs2At29EgiOcxN0rBs5DYUiNk2yLMmbt3X/PnJxt5BijIANN/HlvEeD5jip4iHU
 0F4o1gEDgFRkpEGlnR3tjUpCs/YZRwvmsox9zPqU7Nu4G/x6MjU5tlwT6BHCzq/U
 gSG6O8GSy+pK8B+SJu2SpWSNGqdCmv2a1aKgGA+KLFlad+AM7k1cPoX/Wv5fQGZ6
 iS20CLel4U4A6mzgYnnBhPSNsFYL4y0AxJ2SQ+O8PEWdP6hcmOvT5bo3TJTiTqqP
 vQU9DTzsNxS8NL3ShGVCRAKZVWQav0SQHESTx687bjjPaxg7ppMHpodnRAp3niEI
 5uyKGGerbdmJdKqEjEajpRLJWFjU8lcGMqWUUJFWDkIA88soSF1EoelxifH7rxnA
 raLPxQ/FJKX/Og36jVgH96+a0sz+emnFj/BBrWxySKED5tBQ6HqKPKZqV/uFJE6h
 DJ0qcYIxPdHtOCKYwLBsjJ2au2HUpp5fXzX+EOLmgnxIkHl9tsIbCnCAZldBIKVd
 9ENErc1vFXA38SpHSWRf2mT/sGOjnToxik1PRsWOp7zXNkiXyFRqblQe6uJiUCvM
 jU7Wl0HUNRGP0xEhdL3Ij7uGyOdVauHRLPEy5c+CJ9nSMCMYwYIW2pBdV8IgyRmD
 Y4gxTBrJ8nHTTWLucSFb
 =EEyM
 -----END PGP SIGNATURE-----

Merge tag 'pm-4.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These fix a deadlock in the operating performance points (OPP)
  framework introduced during the 4.11 cycle, more issues with duplicate
  device objects for cpufreq-dt and cpufreq documentation.

  Specifics:

   - Fix a deadlock in the operating performance points (OPP) framework
     caused by a notifier callback taking a lock that's already held by
     its caller (Viresh Kumar).

   - Prevent the ti-cpufreq and cpufreq-dt-platdev drivers from
     attempting to register conflicting device objects which triggers a
     warning from sysfs (Suniel Mahesh).

   - Drop a stale reference to a piece of intel_pstate documentation
     that's not in the tree any more (Rafael Wysocki)"

* tag 'pm-4.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: docs: Drop intel-pstate.txt from index.txt
  cpufreq: dt: Fix sysfs duplicate filename creation for platform-device
  PM / OPP: Call notifier without holding opp_table->lock

Documentation/cpu-freq/index.txt

@@ -32,8 +32,6 @@ cpufreq-stats.txt -	General description of sysfs cpufreq stats.
 
 index.txt	-	File index, Mailing list and Links (this document)
 
-intel-pstate.txt -	Intel pstate cpufreq driver specific file.
-
 pcc-cpufreq.txt -	PCC cpufreq driver specific file.
 
 

drivers/base/power/opp/core.c

@@ -1581,6 +1581,9 @@ static int _opp_set_availability(struct device *dev, unsigned long freq,
 
 	opp->available = availability_req;
 
+	dev_pm_opp_get(opp);
+	mutex_unlock(&opp_table->lock);
+
 	/* Notify the change of the OPP availability */
 	if (availability_req)
 		blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ENABLE,
@@ -1589,8 +1592,12 @@ static int _opp_set_availability(struct device *dev, unsigned long freq,
 		blocking_notifier_call_chain(&opp_table->head,
 					     OPP_EVENT_DISABLE, opp);
 
+	dev_pm_opp_put(opp);
+	goto put_table;
+
 unlock:
 	mutex_unlock(&opp_table->lock);
+put_table:
 	dev_pm_opp_put_opp_table(opp_table);
 	return r;
 }

drivers/cpufreq/cpufreq-dt-platdev.c

@@ -118,6 +118,10 @@ static const struct of_device_id blacklist[] __initconst = {
 
 	{ .compatible = "sigma,tango4", },
 
+	{ .compatible = "ti,am33xx", },
+	{ .compatible = "ti,am43", },
+	{ .compatible = "ti,dra7", },
+
 	{ }
 };