mtd: rawnand: nandsim: Free partition names on error in ns_init()

The ns_init() function shall free the partition names allocated by
ns_get_partition_name() on error.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20200525085851.17682-9-miquel.raynal@bootlin.com

drivers/mtd/nand/raw/nandsim.c

@@ -722,12 +722,14 @@ static int __init ns_init(struct mtd_info *mtd)
 	if (remains) {
 		if (parts_num + 1 > ARRAY_SIZE(ns->partitions)) {
 			NS_ERR("too many partitions.\n");
-			return -EINVAL;
+			ret = -EINVAL;
+			goto free_partition_names;
 		}
 		ns->partitions[i].name = ns_get_partition_name(i);
 		if (!ns->partitions[i].name) {
 			NS_ERR("unable to allocate memory.\n");
-			return -ENOMEM;
+			ret = -ENOMEM;
+			goto free_partition_names;
 		}
 		ns->partitions[i].offset = next_offset;
 		ns->partitions[i].size   = remains;
@@ -756,18 +758,25 @@ static int __init ns_init(struct mtd_info *mtd)
 
 	ret = ns_alloc_device(ns);
 	if (ret)
-		return ret;
+		goto free_partition_names;
 
 	/* Allocate / initialize the internal buffer */
 	ns->buf.byte = kmalloc(ns->geom.pgszoob, GFP_KERNEL);
 	if (!ns->buf.byte) {
 		NS_ERR("init_nandsim: unable to allocate %u bytes for the internal buffer\n",
 			ns->geom.pgszoob);
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto free_partition_names;
 	}
 	memset(ns->buf.byte, 0xFF, ns->geom.pgszoob);
 
 	return 0;
+
+free_partition_names:
+	for (i = 0; i < ARRAY_SIZE(ns->partitions); ++i)
+		kfree(ns->partitions[i].name);
+
+	return ret;
 }
 
 /*