Merge branch 'cpufreq-fix-notification-arm' of git://git.linaro.org/people/vireshk/linux into pm-cpufreq-arm

Pull ARM cpufreq updates from Viresh Kumar.

* 'cpufreq-fix-notification-arm' of git://git.linaro.org/people/vireshk/linux:
  cpufreq: tegra: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: s3c64xx: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: omap: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: imx6q: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: exynos: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: dbx500: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: davinci: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: arm-big-little: call CPUFREQ_POSTCHANGE notfier in error cases

8 files changed, 36 insertions, 20 deletions

diff --git a/drivers/cpufreq/arm_big_little.c b/drivers/cpufreq/arm_big_little.c
index 5d7f53fcd6f5..3549f0784af1 100644
--- a/drivers/cpufreq/arm_big_little.c
+++ b/drivers/cpufreq/arm_big_little.c
@@ -84,11 +84,9 @@ static int bL_cpufreq_set_target(struct cpufreq_policy *policy,
 	ret = clk_set_rate(clk[cur_cluster], freqs.new * 1000);
 	if (ret) {
 		pr_err("clk_set_rate failed: %d\n", ret);
-		return ret;
+		freqs.new = freqs.old;
 	}
 
-	policy->cur = freqs.new;
-
 	cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
 
 	return ret;
diff --git a/drivers/cpufreq/davinci-cpufreq.c b/drivers/cpufreq/davinci-cpufreq.c
index c33c76c360fa..551dd655c6f2 100644
--- a/drivers/cpufreq/davinci-cpufreq.c
+++ b/drivers/cpufreq/davinci-cpufreq.c
@@ -114,6 +114,9 @@ static int davinci_target(struct cpufreq_policy *policy,
 		pdata->set_voltage(idx);
 
 out:
+	if (ret)
+		freqs.new = freqs.old;
+
 	cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
 
 	return ret;
diff --git a/drivers/cpufreq/dbx500-cpufreq.c b/drivers/cpufreq/dbx500-cpufreq.c
index 6ec6539ae041..1fdb02b9f1ec 100644
--- a/drivers/cpufreq/dbx500-cpufreq.c
+++ b/drivers/cpufreq/dbx500-cpufreq.c
@@ -57,13 +57,13 @@ static int dbx500_cpufreq_target(struct cpufreq_policy *policy,
 	if (ret) {
 		pr_err("dbx500-cpufreq: Failed to set armss_clk to %d Hz: error %d\n",
 		       freqs.new * 1000, ret);
-		return ret;
+		freqs.new = freqs.old;
 	}
 
 	/* post change notification */
 	cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
 
-	return 0;
+	return ret;
 }
 
 static unsigned int dbx500_cpufreq_getspeed(unsigned int cpu)
diff --git a/drivers/cpufreq/exynos-cpufreq.c b/drivers/cpufreq/exynos-cpufreq.c
index 475b4f607f0d..0d32f02ef4d6 100644
--- a/drivers/cpufreq/exynos-cpufreq.c
+++ b/drivers/cpufreq/exynos-cpufreq.c
@@ -113,7 +113,8 @@ static int exynos_cpufreq_scale(unsigned int target_freq)
 		if (ret) {
 			pr_err("%s: failed to set cpu voltage to %d\n",
 				__func__, arm_volt);
-			goto out;
+			freqs.new = freqs.old;
+			goto post_notify;
 		}
 	}
 
@@ -123,14 +124,19 @@ static int exynos_cpufreq_scale(unsigned int target_freq)
 		if (ret) {
 			pr_err("%s: failed to set cpu voltage to %d\n",
 				__func__, safe_arm_volt);
-			goto out;
+			freqs.new = freqs.old;
+			goto post_notify;
 		}
 	}
 
 	exynos_info->set_freq(old_index, index);
 
+post_notify:
 	cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
 
+	if (ret)
+		goto out;
+
 	/* When the new frequency is lower than current frequency */
 	if ((freqs.new < freqs.old) ||
 	   ((freqs.new > freqs.old) && safe_arm_volt)) {
diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c
index b78bc35973ba..e37cdaedbb5b 100644
--- a/drivers/cpufreq/imx6q-cpufreq.c
+++ b/drivers/cpufreq/imx6q-cpufreq.c
@@ -68,8 +68,6 @@ static int imx6q_set_target(struct cpufreq_policy *policy,
 	if (freqs.old == freqs.new)
 		return 0;
 
-	cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-
 	rcu_read_lock();
 	opp = opp_find_freq_ceil(cpu_dev, &freq_hz);
 	if (IS_ERR(opp)) {
@@ -86,13 +84,16 @@ static int imx6q_set_target(struct cpufreq_policy *policy,
 		freqs.old / 1000, volt_old / 1000,
 		freqs.new / 1000, volt / 1000);
 
+	cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
+
 	/* scaling up?  scale voltage before frequency */
 	if (freqs.new > freqs.old) {
 		ret = regulator_set_voltage_tol(arm_reg, volt, 0);
 		if (ret) {
 			dev_err(cpu_dev,
 				"failed to scale vddarm up: %d\n", ret);
-			return ret;
+			freqs.new = freqs.old;
+			goto post_notify;
 		}
 
 		/*
@@ -145,15 +146,18 @@ static int imx6q_set_target(struct cpufreq_policy *policy,
 	if (ret) {
 		dev_err(cpu_dev, "failed to set clock rate: %d\n", ret);
 		regulator_set_voltage_tol(arm_reg, volt_old, 0);
-		return ret;
+		freqs.new = freqs.old;
+		goto post_notify;
 	}
 
 	/* scaling down?  scale voltage after frequency */
 	if (freqs.new < freqs.old) {
 		ret = regulator_set_voltage_tol(arm_reg, volt, 0);
-		if (ret)
+		if (ret) {
 			dev_warn(cpu_dev,
 				 "failed to scale vddarm down: %d\n", ret);
+			ret = 0;
+		}
 
 		if (freqs.old == FREQ_1P2_GHZ / 1000) {
 			regulator_set_voltage_tol(pu_reg,
@@ -163,9 +167,10 @@ static int imx6q_set_target(struct cpufreq_policy *policy,
 		}
 	}
 
+post_notify:
 	cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
 
-	return 0;
+	return ret;
 }
 
 static int imx6q_cpufreq_init(struct cpufreq_policy *policy)
diff --git a/drivers/cpufreq/omap-cpufreq.c b/drivers/cpufreq/omap-cpufreq.c
index 0279d18a57f9..29468a522ee9 100644
--- a/drivers/cpufreq/omap-cpufreq.c
+++ b/drivers/cpufreq/omap-cpufreq.c
@@ -93,9 +93,6 @@ static int omap_target(struct cpufreq_policy *policy,
 	if (freqs.old == freqs.new && policy->cur == freqs.new)
 		return ret;
 
-	/* notifiers */
-	cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-
 	freq = freqs.new * 1000;
 	ret = clk_round_rate(mpu_clk, freq);
 	if (IS_ERR_VALUE(ret)) {
@@ -125,6 +122,9 @@ static int omap_target(struct cpufreq_policy *policy,
 		freqs.old / 1000, volt_old ? volt_old / 1000 : -1,
 		freqs.new / 1000, volt ? volt / 1000 : -1);
 
+	/* notifiers */
+	cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
+
 	/* scaling up?  scale voltage before frequency */
 	if (mpu_reg && (freqs.new > freqs.old)) {
 		r = regulator_set_voltage(mpu_reg, volt - tol, volt + tol);
diff --git a/drivers/cpufreq/s3c64xx-cpufreq.c b/drivers/cpufreq/s3c64xx-cpufreq.c
index 27cacb524796..017ade0af36b 100644
--- a/drivers/cpufreq/s3c64xx-cpufreq.c
+++ b/drivers/cpufreq/s3c64xx-cpufreq.c
@@ -104,7 +104,8 @@ static int s3c64xx_cpufreq_set_target(struct cpufreq_policy *policy,
 		if (ret != 0) {
 			pr_err("Failed to set VDDARM for %dkHz: %d\n",
 			       freqs.new, ret);
-			goto err;
+			freqs.new = freqs.old;
+			goto post_notify;
 		}
 	}
 #endif
@@ -113,10 +114,13 @@ static int s3c64xx_cpufreq_set_target(struct cpufreq_policy *policy,
 	if (ret < 0) {
 		pr_err("Failed to set rate %dkHz: %d\n",
 		       freqs.new, ret);
-		goto err;
+		freqs.new = freqs.old;
 	}
 
+post_notify:
 	cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
+	if (ret)
+		goto err;
 
 #ifdef CONFIG_REGULATOR
 	if (vddarm && freqs.new < freqs.old) {
diff --git a/drivers/cpufreq/tegra-cpufreq.c b/drivers/cpufreq/tegra-cpufreq.c
index c74c0e130ef4..e74d7774cf1e 100644
--- a/drivers/cpufreq/tegra-cpufreq.c
+++ b/drivers/cpufreq/tegra-cpufreq.c
@@ -138,12 +138,12 @@ static int tegra_update_cpu_speed(struct cpufreq_policy *policy,
 	if (ret) {
 		pr_err("cpu-tegra: Failed to set cpu frequency to %d kHz\n",
 			freqs.new);
-		return ret;
+		freqs.new = freqs.old;
 	}
 
 	cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
 
-	return 0;
+	return ret;
 }
 
 static unsigned long tegra_cpu_highest_speed(void)