From 6ce4184d0308888dd6ac2b6ab5f8ec0b2006092e Mon Sep 17 00:00:00 2001 From: Viresh Kumar Date: Wed, 10 Dec 2014 09:45:35 +0530 Subject: [PATCH] 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 Signed-off-by: Rafael J. Wysocki --- drivers/base/power/opp.c | 17 ++++++++++------- 1 file 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; } /** -- 2.20.1