openwrtv4/target/linux/generic/patches-3.14/431-mtd-bcm47xxpart-support-TRX-data-partition-being-UBI.patch

--- a/drivers/mtd/bcm47xxpart.c
+++ b/drivers/mtd/bcm47xxpart.c
@@ -40,6 +40,7 @@
 #define ML_MAGIC2			0x26594131
 #define TRX_MAGIC			0x30524448
 #define SQSH_MAGIC			0x71736873	/* shsq */
+#define UBI_EC_MAGIC			0x23494255	/* UBI# */
 
 struct trx_header {
 	uint32_t magic;
@@ -50,7 +51,7 @@ struct trx_header {
 	uint32_t offset[3];
 } __packed;
 
-static void bcm47xxpart_add_part(struct mtd_partition *part, char *name,
+static void bcm47xxpart_add_part(struct mtd_partition *part, const char *name,
 				 u64 offset, uint32_t mask_flags)
 {
 	part->name = name;
@@ -58,6 +59,26 @@ static void bcm47xxpart_add_part(struct
 	part->mask_flags = mask_flags;
 }
 
+static const char *bcm47xxpart_trx_data_part_name(struct mtd_info *master,
+						  size_t offset)
+{
+	uint32_t buf;
+	size_t bytes_read;
+
+	if (mtd_read(master, offset, sizeof(&buf), &bytes_read,
+		     (uint8_t *)&buf) < 0) {
+		pr_err("mtd_read error while parsing (offset: 0x%X)!\n",
+			offset);
+		goto out_default;
+	}
+
+	if (buf == UBI_EC_MAGIC)
+		return "ubi";
+
+out_default:
+	return "rootfs";
+}
+
 static int bcm47xxpart_parse(struct mtd_info *master,
 			     struct mtd_partition **pparts,
 			     struct mtd_part_parser_data *data)
@@ -151,6 +172,8 @@ static int bcm47xxpart_parse(struct mtd_
 
 		/* TRX */
 		if (buf[0x000 / 4] == TRX_MAGIC) {
+			const char *name;
+
 			if (BCM47XXPART_MAX_PARTS - curr_part < 4) {
 				pr_warn("Not enough partitions left to register trx, scanning stopped!\n");
 				break;
@@ -186,8 +209,9 @@ static int bcm47xxpart_parse(struct mtd_
 			 * we want to have jffs2 (overlay) in the same mtd.
 			 */
 			if (trx->offset[i]) {
+				name = bcm47xxpart_trx_data_part_name(master, offset + trx->offset[i]);
 				bcm47xxpart_add_part(&parts[curr_part++],
-						     "rootfs",
+						     name,
 						     offset + trx->offset[i],
 						     0);
 				i++;