[PATCH v2] mtd: powernv_flash: check return value of devm_kasprintf()

[Yi Yang]

devm_kasprintf() returns a pointer to dynamically allocated memory
which can be NULL upon failure. Ensure the allocation was successful by
checking the pointer validity.

Fixes: acfe63ec1c59 ("mtd: Convert to using %pOFn instead of device_node.name")
Signed-off-by: Yi Yang <yiyang13 at huawei.com>
---
 drivers/mtd/devices/powernv_flash.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/mtd/devices/powernv_flash.c b/drivers/mtd/devices/powernv_flash.c
index 66044f4f5bad..956a79c739e5 100644
--- a/drivers/mtd/devices/powernv_flash.c
+++ b/drivers/mtd/devices/powernv_flash.c
@@ -207,6 +207,10 @@ 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) {
+		dev_err(dev, "failed to allocate mtd->name\n");
+		return -ENOMEM;
+	}
 	mtd->type = MTD_NORFLASH;
 	mtd->flags = MTD_WRITEABLE;
 	mtd->size = size;
-- 
2.25.1