linux-kernel - [PATCH] cpufreq: scmi: process the result of devm_of_clk_add_hw

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Date:   Fri, 17 Nov 2023 10:49:11 +0300
From:   Alexandra Diupina <adiupina@...ralinux.ru>
To:     Sudeep Holla <sudeep.holla@....com>
Cc:     Alexandra Diupina <adiupina@...ralinux.ru>,
        Cristian Marussi <cristian.marussi@....com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        linux-arm-kernel@...ts.infradead.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, lvc-project@...uxtesting.org
Subject: [PATCH] cpufreq: scmi: process the result of devm_of_clk_add_hw_provider()

devm_of_clk_add_hw_provider() may return an errno, so
add a return value check

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 8410e7f3b31e ("cpufreq: scmi: Fix OPP addition failure with a dummy clock provider")
Signed-off-by: Alexandra Diupina <adiupina@...ralinux.ru>
---
 drivers/cpufreq/scmi-cpufreq.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/cpufreq/scmi-cpufreq.c b/drivers/cpufreq/scmi-cpufreq.c
index c8a7ccc42c16..4037945663bf 100644
--- a/drivers/cpufreq/scmi-cpufreq.c
+++ b/drivers/cpufreq/scmi-cpufreq.c
@@ -334,8 +334,13 @@ static int scmi_cpufreq_probe(struct scmi_device *sdev)
 
 #ifdef CONFIG_COMMON_CLK
 	/* dummy clock provider as needed by OPP if clocks property is used */
-	if (of_property_present(dev->of_node, "#clock-cells"))
-		devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, NULL);
+	if (of_property_present(dev->of_node, "#clock-cells")) {
+		ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, NULL);
+		if (ret) {
+			dev_err(dev, "%s: registering clock provider failed, err: %d\n",
+				__func__, ret);
+		}
+	}
 #endif
 
 	ret = cpufreq_register_driver(&scmi_cpufreq_driver);
-- 
2.30.2