linux-kernel - [PATCH] opp: Fix required-opps phandle array count check

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Date:   Thu, 30 Sep 2021 15:39:08 +0530
From:   Pavankumar Kondeti <pkondeti@...eaurora.org>
To:     linux-kernel@...r.kernel.org
Cc:     linux-pm@...r.kernel.org, "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        Pavankumar Kondeti <pkondeti@...eaurora.org>,
        Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
        Stephen Boyd <sboyd@...nel.org>
Subject: [PATCH] opp: Fix required-opps phandle array count check

The 'required-opps' property is optional. So of_count_phandle_with_args()
can return -ENOENT when queried for required-opps. Handle this case.

Signed-off-by: Pavankumar Kondeti <pkondeti@...eaurora.org>
---
 drivers/opp/of.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/opp/of.c b/drivers/opp/of.c
index 2a97c65..5437085 100644
--- a/drivers/opp/of.c
+++ b/drivers/opp/of.c
@@ -170,7 +170,7 @@ static void _opp_table_alloc_required_tables(struct opp_table *opp_table,
 	}
 
 	count = of_count_phandle_with_args(np, "required-opps", NULL);
-	if (!count)
+	if (count <= 0)
 		goto put_np;
 
 	required_opp_tables = kcalloc(count, sizeof(*required_opp_tables),
-- 
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.