Merge tag 'pm-4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "Fix for a latent cpufreq driver bug uncovered by a recent ACPICA
  change and several fixes for the devfreq framework, including one fix
  for an issue introduced recently.

  Specifics:

   - Fix a latent initialization issue in the pcc-cpufreq driver
     (incorrect initial value of a structure field) that has been
     uncovered by a recent ACPICA commit (Mike Galbraith).

   - Add a missing notification in an update_devfreq() error code path
     forgotten by a recent devfreq commit (Chanwoo Choi).

   - Fix devfreq device frequency initialization (Lukasz Luba).

   - Fix an incorrect IS_ERR() check in the devfreq framework discovered
     by the Smatch checker (Dan Carpenter).

   - Drop two excessive put_device() calls from the devfreq framework
     (MyungJoo Ham, Cai Zhiyong).

   - Fix a possible memory leak in the devfreq framework and drop an
     unnecessary kfree() invocation from it (MyungJoo Ham)"

* tag 'pm-4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM / devfreq: Send the DEVFREQ_POSTCHANGE notification when target() is failed
  cpufreq: pcc-cpufreq: Fix doorbell.access_width
  PM / devfreq: fix initialization of current frequency in last status
  PM / devfreq: exynos-nocp: Remove incorrect IS_ERR() check
  PM / devfreq: remove double put_device
  PM / devfreq: fix double call put_device
  PM / devfreq: fix duplicated kfree on devfreq pointer
  PM / devfreq: devm_kzalloc to have dev pointer more precisely

diff --git a/drivers/cpufreq/pcc-cpufreq.c b/drivers/cpufreq/pcc-cpufreq.c
index 808a320..a7ecb9a 100644 (file)
--- a/drivers/cpufreq/pcc-cpufreq.c
+++ b/drivers/cpufreq/pcc-cpufreq.c
@@ -487,7 +487,7 @@ static int __init pcc_cpufreq_probe(void)
        doorbell.space_id = reg_resource->space_id;
        doorbell.bit_width = reg_resource->bit_width;
        doorbell.bit_offset = reg_resource->bit_offset;
-       doorbell.access_width = 64;
+       doorbell.access_width = 4;
        doorbell.address = reg_resource->address;
 
        pr_debug("probe: doorbell: space_id is %d, bit_width is %d, "

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 1d6c803..e92418f 100644 (file)
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -268,8 +268,11 @@ int update_devfreq(struct devfreq *devfreq)
        devfreq_notify_transition(devfreq, &freqs, DEVFREQ_PRECHANGE);
 
        err = devfreq->profile->target(devfreq->dev.parent, &freq, flags);
-       if (err)
+       if (err) {
+               freqs.new = cur_freq;
+               devfreq_notify_transition(devfreq, &freqs, DEVFREQ_POSTCHANGE);
                return err;
+       }
 
        freqs.new = freq;
        devfreq_notify_transition(devfreq, &freqs, DEVFREQ_POSTCHANGE);
@@ -552,6 +555,7 @@ struct devfreq *devfreq_add_device(struct device *dev,
        devfreq->profile = profile;
        strncpy(devfreq->governor_name, governor_name, DEVFREQ_NAME_LEN);
        devfreq->previous_freq = profile->initial_freq;
+       devfreq->last_status.current_frequency = profile->initial_freq;
        devfreq->data = data;
        devfreq->nb.notifier_call = devfreq_notifier_call;
 
@@ -561,23 +565,22 @@ struct devfreq *devfreq_add_device(struct device *dev,
                mutex_lock(&devfreq->lock);
        }
 
-       devfreq->trans_table =  devm_kzalloc(dev, sizeof(unsigned int) *
-                                               devfreq->profile->max_state *
-                                               devfreq->profile->max_state,
-                                               GFP_KERNEL);
-       devfreq->time_in_state = devm_kzalloc(dev, sizeof(unsigned long) *
-                                               devfreq->profile->max_state,
-                                               GFP_KERNEL);
-       devfreq->last_stat_updated = jiffies;
-
        dev_set_name(&devfreq->dev, "%s", dev_name(dev));
        err = device_register(&devfreq->dev);
        if (err) {
-               put_device(&devfreq->dev);
                mutex_unlock(&devfreq->lock);
                goto err_out;
        }
 
+       devfreq->trans_table =  devm_kzalloc(&devfreq->dev, sizeof(unsigned int) *
+                                               devfreq->profile->max_state *
+                                               devfreq->profile->max_state,
+                                               GFP_KERNEL);
+       devfreq->time_in_state = devm_kzalloc(&devfreq->dev, sizeof(unsigned long) *
+                                               devfreq->profile->max_state,
+                                               GFP_KERNEL);
+       devfreq->last_stat_updated = jiffies;
+
        srcu_init_notifier_head(&devfreq->transition_notifier_list);
 
        mutex_unlock(&devfreq->lock);
@@ -603,7 +606,6 @@ struct devfreq *devfreq_add_device(struct device *dev,
 err_init:
        list_del(&devfreq->node);
        device_unregister(&devfreq->dev);
-       kfree(devfreq);
 err_out:
        return ERR_PTR(err);
 }
@@ -621,7 +623,6 @@ int devfreq_remove_device(struct devfreq *devfreq)
                return -EINVAL;
 
        device_unregister(&devfreq->dev);
-       put_device(&devfreq->dev);
 
        return 0;
 }

diff --git a/drivers/devfreq/event/exynos-nocp.c b/drivers/devfreq/event/exynos-nocp.c
index 6b6a5f3..a584140 100644 (file)
--- a/drivers/devfreq/event/exynos-nocp.c
+++ b/drivers/devfreq/event/exynos-nocp.c
@@ -220,9 +220,6 @@ static int exynos_nocp_parse_dt(struct platform_device *pdev,
 
        /* Maps the memory mapped IO to control nocp register */
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       if (IS_ERR(res))
-               return PTR_ERR(res);
-
        base = devm_ioremap_resource(dev, res);
        if (IS_ERR(base))
                return PTR_ERR(base);