linux-kernel - [PATCH] memory: atmel-sdramc: check of_device_get_match

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Date:   Wed,  7 Apr 2021 17:44:47 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Ludovic Desroches <ludovic.desroches@...rochip.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: [PATCH] memory: atmel-sdramc: check of_device_get_match_data() return value

If the driver is probed, the of_device_get_match_data() should not
return NULL, however for sanity check its return value.

Addresses-Coverity: Dereference null return value
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
---
 drivers/memory/atmel-sdramc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/memory/atmel-sdramc.c b/drivers/memory/atmel-sdramc.c
index 9c49d00c2a96..e09b2617f63d 100644
--- a/drivers/memory/atmel-sdramc.c
+++ b/drivers/memory/atmel-sdramc.c
@@ -45,6 +45,8 @@ static int atmel_ramc_probe(struct platform_device *pdev)
 	struct clk *clk;
 
 	caps = of_device_get_match_data(&pdev->dev);
+	if (!caps)
+		return -EINVAL;
 
 	if (caps->has_ddrck) {
 		clk = devm_clk_get(&pdev->dev, "ddrck");
-- 
2.25.1