EDAC, synopsys: Add error handling for the of_device_get_match_data() result

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

Signed-off-by: Manish Narani <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
CC: Mauro Carvalho Chehab <[email protected]>
CC: Michal Simek <[email protected]>
CC: [email protected]
CC: [email protected]
CC: [email protected]
CC: [email protected]
CC: linux-edac <[email protected]>
CC: [email protected]
CC: [email protected]
CC: [email protected]
Link: http://lkml.kernel.org/r/[email protected]

Author: mnarani

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;