mtd: powernv: Add check devm_kasprintf() returned value

devm_kasprintf() can return a NULL pointer on failure but this
returned value is not checked.

Fixes: acfe63e ("mtd: Convert to using %pOFn instead of device_node.name")
Signed-off-by: Charles Han <[email protected]>
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/[email protected]

Author: Charles Han

drivers/mtd/devices/powernv_flash.c

@@ -207,6 +207,9 @@ static int powernv_flash_set_driver_info(struct device *dev,
 	 * get them
 	 */
 	mtd->name = devm_kasprintf(dev, GFP_KERNEL, "%pOFP", dev->of_node);
+	if (!mtd->name)
+		return -ENOMEM;
+
 	mtd->type = MTD_NORFLASH;
 	mtd->flags = MTD_WRITEABLE;
 	mtd->size = size;