mtd: nand: davinci: return ENOMEM if memory allocation is failed

In case when memory allocation is failed the driver should return
ENOMEM instead of ENODEV.
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Taras Kondratiuk <taras@ti.com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

drivers/mtd/nand/davinci_nand.c

@@ -541,7 +541,7 @@ static struct davinci_nand_pdata
 				GFP_KERNEL);
 		pdev->dev.platform_data = pdata;
 		if (!pdata)
-			return NULL;
+			return ERR_PTR(-ENOMEM);
 		if (!of_property_read_u32(pdev->dev.of_node,
 			"ti,davinci-chipselect", &prop))
 			pdev->id = prop;
@@ -598,6 +598,9 @@ static int nand_davinci_probe(struct platform_device *pdev)
 	nand_ecc_modes_t		ecc_mode;
 
 	pdata = nand_davinci_get_pdata(pdev);
+	if (IS_ERR(pdata))
+		return PTR_ERR(pdata);
+
 	/* insist on board-specific configuration */
 	if (!pdata)
 		return -ENODEV;