From: Leonard Crestez <leonard.crestez@nxp.com>
To: MyungJoo Ham <myungjoo.ham@samsung.com>,
Kyungmin Park <kyungmin.park@samsung.com>
Cc: "Chanwoo Choi" <cw00.choi@samsung.com>,
"Artur Świgoń" <a.swigon@partner.samsung.com>,
"Saravana Kannan" <saravanak@google.com>,
"Krzysztof Kozlowski" <krzk@kernel.org>,
"Alexandre Bailon" <abailon@baylibre.com>,
"Georgi Djakov" <georgi.djakov@linaro.org>,
"Abel Vesa" <abel.vesa@nxp.com>, "Jacky Bai" <ping.bai@nxp.com>,
"Viresh Kumar" <viresh.kumar@linaro.org>,
linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: [PATCH 3/8] PM / devfreq: Move more initialization before registration
Date: Wed, 18 Sep 2019 03:18:22 +0300 [thread overview]
Message-ID: <59bd0d871fad520eb417ca46943fa7f86ef9186a.1568764439.git.leonard.crestez@nxp.com> (raw)
In-Reply-To: <cover.1568764439.git.leonard.crestez@nxp.com>
In-Reply-To: <cover.1568764439.git.leonard.crestez@nxp.com>
In general it is a better to initialize an object before making it
accessible externally (through device_register).
This make it possible to avoid relying on locking a partially
initialized object.
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
---
drivers/devfreq/devfreq.c | 38 ++++++++++++++++++++------------------
1 file changed, 20 insertions(+), 18 deletions(-)
diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index a715f27f35fd..57a217fc92de 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -589,10 +589,12 @@ static void devfreq_dev_release(struct device *dev)
if (devfreq->profile->exit)
devfreq->profile->exit(devfreq->dev.parent);
mutex_destroy(&devfreq->lock);
+ kfree(devfreq->time_in_state);
+ kfree(devfreq->trans_table);
kfree(devfreq);
}
/**
* devfreq_add_device() - Add devfreq feature to the device
@@ -671,44 +673,43 @@ struct devfreq *devfreq_add_device(struct device *dev,
devfreq->max_freq = devfreq->scaling_max_freq;
devfreq->suspend_freq = dev_pm_opp_get_suspend_opp_freq(dev);
atomic_set(&devfreq->suspend_count, 0);
- dev_set_name(&devfreq->dev, "devfreq%d",
- atomic_inc_return(&devfreq_no));
- err = device_register(&devfreq->dev);
- if (err) {
- mutex_unlock(&devfreq->lock);
- put_device(&devfreq->dev);
- goto err_out;
- }
-
- devfreq->trans_table = devm_kzalloc(&devfreq->dev,
+ devfreq->trans_table = kzalloc(
array3_size(sizeof(unsigned int),
devfreq->profile->max_state,
devfreq->profile->max_state),
GFP_KERNEL);
if (!devfreq->trans_table) {
mutex_unlock(&devfreq->lock);
err = -ENOMEM;
- goto err_devfreq;
+ goto err_dev;
}
- devfreq->time_in_state = devm_kcalloc(&devfreq->dev,
- devfreq->profile->max_state,
- sizeof(unsigned long),
- GFP_KERNEL);
+ devfreq->time_in_state = kcalloc(devfreq->profile->max_state,
+ sizeof(unsigned long),
+ GFP_KERNEL);
if (!devfreq->time_in_state) {
mutex_unlock(&devfreq->lock);
err = -ENOMEM;
- goto err_devfreq;
+ goto err_dev;
}
devfreq->last_stat_updated = jiffies;
srcu_init_notifier_head(&devfreq->transition_notifier_list);
+ dev_set_name(&devfreq->dev, "devfreq%d",
+ atomic_inc_return(&devfreq_no));
+ err = device_register(&devfreq->dev);
+ if (err) {
+ mutex_unlock(&devfreq->lock);
+ put_device(&devfreq->dev);
+ goto err_out;
+ }
+
mutex_unlock(&devfreq->lock);
mutex_lock(&devfreq_list_lock);
governor = try_then_request_governor(devfreq->governor_name);
@@ -734,14 +735,15 @@ struct devfreq *devfreq_add_device(struct device *dev,
return devfreq;
err_init:
mutex_unlock(&devfreq_list_lock);
-err_devfreq:
devfreq_remove_device(devfreq);
- devfreq = NULL;
+ return ERR_PTR(err);
err_dev:
+ kfree(devfreq->time_in_state);
+ kfree(devfreq->trans_table);
kfree(devfreq);
err_out:
return ERR_PTR(err);
}
EXPORT_SYMBOL(devfreq_add_device);
--
2.17.1
next prev parent reply other threads:[~2019-09-18 0:18 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-18 0:18 [PATCH 0/8] PM / devfreq: Add dev_pm_qos support Leonard Crestez
2019-09-18 0:18 ` [PATCH 1/8] PM / devfreq: Lock devfreq in trans_stat_show Leonard Crestez
2019-09-18 21:28 ` Matthias Kaehlcke
2019-09-19 18:42 ` Leonard Crestez
2019-09-19 19:25 ` Matthias Kaehlcke
2019-09-18 0:18 ` [PATCH 2/8] PM / devfreq: Don't fail devfreq_dev_release if not in list Leonard Crestez
2019-09-18 21:41 ` Matthias Kaehlcke
2019-09-18 0:18 ` Leonard Crestez [this message]
2019-09-18 23:29 ` [PATCH 3/8] PM / devfreq: Move more initialization before registration Matthias Kaehlcke
2019-09-19 0:14 ` Matthias Kaehlcke
2019-09-19 18:52 ` Leonard Crestez
2019-09-19 19:16 ` Matthias Kaehlcke
2019-09-18 0:18 ` [PATCH 4/8] PM / devfreq: Don't take lock in devfreq_add_device Leonard Crestez
2019-09-19 0:20 ` Matthias Kaehlcke
2019-09-18 0:18 ` [PATCH 5/8] PM / devfreq: Introduce devfreq_get_freq_range Leonard Crestez
2019-09-19 18:07 ` Matthias Kaehlcke
2019-09-18 0:18 ` [PATCH 6/8] PM / devfreq: Add dev_pm_qos support Leonard Crestez
2019-09-19 19:12 ` Matthias Kaehlcke
2019-09-18 0:18 ` [PATCH 7/8] PM / devfreq: Use dev_pm_qos for sysfs min/max_freq Leonard Crestez
2019-09-19 19:59 ` Matthias Kaehlcke
2019-09-20 13:50 ` Leonard Crestez
2019-09-18 0:18 ` [PATCH 8/8] PM / devfreq: Move opp notifier registration to core Leonard Crestez
2019-09-30 21:49 ` Chanwoo Choi
2019-10-01 15:14 ` Leonard Crestez
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