linux-kernel - [PATCH 5.4 316/388] opp: Increase parsed_static_opps in _of_add_opp_table

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Date:   Tue, 29 Sep 2020 13:00:47 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Walter Lozano <walter.lozano@...labora.com>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 316/388] opp: Increase parsed_static_opps in _of_add_opp_table_v1()

From: Walter Lozano <walter.lozano@...labora.com>

[ Upstream commit 6544abc520f0fff701e9da382110dc29676c683a ]

Currently, when using _of_add_opp_table_v2 parsed_static_opps is
increased and this value is used in _opp_remove_all_static() to
check if there are static opp entries that need to be freed.
Unfortunately this does not happen when using _of_add_opp_table_v1(),
which leads to warnings.

This patch increases parsed_static_opps in _of_add_opp_table_v1() in a
similar way as in _of_add_opp_table_v2().

Fixes: 03758d60265c ("opp: Replace list_kref with a local counter")
Cc: v5.6+ <stable@...r.kernel.org> # v5.6+
Signed-off-by: Walter Lozano <walter.lozano@...labora.com>
[ Viresh: Do the operation with lock held and set the value to 1 instead
	  of incrementing it ]
Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/opp/of.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/opp/of.c b/drivers/opp/of.c
index 9cd8f0adacae4..249738e1e0b7a 100644
--- a/drivers/opp/of.c
+++ b/drivers/opp/of.c
@@ -733,6 +733,10 @@ static int _of_add_opp_table_v1(struct device *dev, struct opp_table *opp_table)
 		return -EINVAL;
 	}
 
+	mutex_lock(&opp_table->lock);
+	opp_table->parsed_static_opps = 1;
+	mutex_unlock(&opp_table->lock);
+
 	val = prop->value;
 	while (nr) {
 		unsigned long freq = be32_to_cpup(val++) * 1000;
-- 
2.25.1