mtd: nand: qcom: Add a NULL check for devm_kasprintf()

commit 069f053 upstream.

devm_kasprintf() may fail, so we should better add a NULL check
and propagate an error on failure.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/mtd/nand/qcom_nandc.c

@@ -2544,6 +2544,9 @@ static int qcom_nand_host_init(struct qcom_nand_controller *nandc,
 
  nand_set_flash_node(chip, dn);
  mtd->name = devm_kasprintf(dev, GFP_KERNEL, "qcom_nand.%d", host->cs);
+ if (!mtd->name)
+ return -ENOMEM;
+
  mtd->owner = THIS_MODULE;
  mtd->dev.parent = dev;