linux-kernel - [PATCH v9 1/6] edac: synopsys: Add error handling for NULL in probe()

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Date:   Mon, 15 Oct 2018 10:59:43 +0530
From:   Manish Narani <manish.narani@...inx.com>
To:     <robh+dt@...nel.org>, <mark.rutland@....com>,
        <michal.simek@...inx.com>, <bp@...en8.de>, <mchehab@...nel.org>,
        <manish.narani@...inx.com>, <amit.kucheria@...aro.org>,
        <sudeep.holla@....com>, <olof@...om.net>
CC:     <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-edac@...r.kernel.org>
Subject: [PATCH v9 1/6] edac: synopsys: Add error handling for NULL in probe()

The function of_device_get_match_data() can return NULL in case of
error. Add error handling for the same in probe().

Signed-off-by: Manish Narani <manish.narani@...inx.com>
---
 drivers/edac/synopsys_edac.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/edac/synopsys_edac.c b/drivers/edac/synopsys_edac.c
index 1c3795d..0005ef3 100644
--- a/drivers/edac/synopsys_edac.c
+++ b/drivers/edac/synopsys_edac.c
@@ -477,6 +477,9 @@ static int mc_probe(struct platform_device *pdev)
 		return PTR_ERR(baseaddr);
 
 	p_data = of_device_get_match_data(&pdev->dev);
+	if (!p_data)
+		return -ENODEV;
+
 	if (!p_data->get_ecc_state(baseaddr)) {
 		edac_printk(KERN_INFO, EDAC_MC, "ECC not enabled\n");
 		return -ENXIO;
-- 
2.1.1