From: Chander Kashyap <k.chan...@samsung.com>
This patch detects the duplicate OPP entries and discards them
Signed-off-by: Chander Kashyap <k.chan...@samsung.com>
Signed-off-by: Inderpal Singh <inderpa...@samsung.com>
---
Changes in v3:
- Modify the commit log
Changes in v2:
- Reorder check for duplicate opp
drivers/base/power/opp.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c
index ca521e1..973da78 100644
--- a/drivers/base/power/opp.c
+++ b/drivers/base/power/opp.c
@@ -443,15 +443,24 @@ int dev_pm_opp_add(struct device *dev, unsigned long
freq, unsigned long u_volt)
new_opp->u_volt = u_volt;
new_opp->available = true;
- /* Insert new OPP in order of increasing frequency */
+ /*
+ * Insert new OPP in order of increasing frequency
+ * and discard if already present
+ */
head = &dev_opp->opp_list;
list_for_each_entry_rcu(opp, &dev_opp->opp_list, node) {
- if (new_opp->rate < opp->rate)
+ if (new_opp->rate <= opp->rate)
break;
else
head = &opp->node;
}
+ if (new_opp->rate == opp->rate) {
+ mutex_unlock(&dev_opp_list_lock);
+ kfree(new_opp);
+ return 0;
+ }
+
list_add_rcu(&new_opp->node, head);
mutex_unlock(&dev_opp_list_lock);
--
1.7.9.5
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