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authorViresh Kumar <viresh.kumar@linaro.org>2014-12-10 07:15:35 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-12-11 00:18:34 +0300
commit6ce4184d0308888dd6ac2b6ab5f8ec0b2006092e (patch)
tree986a1cb3efce104afd0cc80d9a1c151a3e6a7845 /drivers/base/power
parent07cce74a7b259cb90029530e9549bf1d9a1b1c34 (diff)
downloadlinux-6ce4184d0308888dd6ac2b6ab5f8ec0b2006092e.tar.xz
PM / OPP: do error handling at the bottom of dev_pm_opp_add_dynamic()
This makes it less error prone and moves common resource deallocation at a single place. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/base/power')
-rw-r--r--drivers/base/power/opp.c17
1 files changed, 10 insertions, 7 deletions
diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c
index 1150b9d2e012..d24dd614a0bd 100644
--- a/drivers/base/power/opp.c
+++ b/drivers/base/power/opp.c
@@ -413,6 +413,7 @@ static int dev_pm_opp_add_dynamic(struct device *dev, unsigned long freq,
struct device_opp *dev_opp = NULL;
struct dev_pm_opp *opp, *new_opp;
struct list_head *head;
+ int ret;
/* allocate new OPP node */
new_opp = kzalloc(sizeof(*new_opp), GFP_KERNEL);
@@ -435,9 +436,8 @@ static int dev_pm_opp_add_dynamic(struct device *dev, unsigned long freq,
if (IS_ERR(dev_opp)) {
dev_opp = add_device_opp(dev);
if (!dev_opp) {
- mutex_unlock(&dev_opp_list_lock);
- kfree(new_opp);
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto free_opp;
}
head = &dev_opp->opp_list;
@@ -458,15 +458,13 @@ static int dev_pm_opp_add_dynamic(struct device *dev, unsigned long freq,
/* Duplicate OPPs ? */
if (new_opp->rate == opp->rate) {
- int ret = opp->available && new_opp->u_volt == opp->u_volt ?
+ ret = opp->available && new_opp->u_volt == opp->u_volt ?
0 : -EEXIST;
dev_warn(dev, "%s: duplicate OPPs detected. Existing: freq: %lu, volt: %lu, enabled: %d. New: freq: %lu, volt: %lu, enabled: %d\n",
__func__, opp->rate, opp->u_volt, opp->available,
new_opp->rate, new_opp->u_volt, new_opp->available);
- mutex_unlock(&dev_opp_list_lock);
- kfree(new_opp);
- return ret;
+ goto free_opp;
}
list_add:
@@ -480,6 +478,11 @@ list_add:
*/
srcu_notifier_call_chain(&dev_opp->srcu_head, OPP_EVENT_ADD, new_opp);
return 0;
+
+free_opp:
+ mutex_unlock(&dev_opp_list_lock);
+ kfree(new_opp);
+ return ret;
}
/**