linux-kernel - [PATCH] firmware: arm_scmi: Fix to check return value of of_match

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Message-Id: <20190318230430.8273-1-pakki001@umn.edu>
Date:   Mon, 18 Mar 2019 18:04:30 -0500
From:   Aditya Pakki <pakki001@....edu>
To:     pakki001@....edu
Cc:     kjlu@....edu, Sudeep Holla <sudeep.holla@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] firmware: arm_scmi: Fix to check return value of of_match_device

of_match_device can return NULL if no matching device is found. This patch
checks and returns -ENODEV in such a scenario.

Signed-off-by: Aditya Pakki <pakki001@....edu>
---
 drivers/firmware/arm_scmi/driver.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
index 8f952f2f1a29..0e0330b44b7b 100644
--- a/drivers/firmware/arm_scmi/driver.c
+++ b/drivers/firmware/arm_scmi/driver.c
@@ -799,6 +799,8 @@ static int scmi_probe(struct platform_device *pdev)
 	}
 
 	desc = of_match_device(scmi_of_match, dev)->data;
+	if (!desc)
+		return -ENODEV;
 
 	info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
 	if (!info)
-- 
2.17.1