[OpenWrt-Devel] [PATCH 2/3] kernel: mtdsplit: detect UBI partition when looking for rootfs

[Rafał Miłecki]

This allows mtdsplit parsers work with UBI which is very popular on
NAND flases.

Signed-off-by: Rafał Miłecki <zajec5 at gmail.com>
---
 target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit.c | 6 ++++++
 target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit.h | 1 +
 2 files changed, 7 insertions(+)

diff --git a/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit.c b/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit.c
index 4f6b46e..9a330df 100644
--- a/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit.c
+++ b/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit.c
@@ -22,6 +22,8 @@
 
 #include "mtdsplit.h"
 
+#define UBI_EC_MAGIC			0x55424923	/* UBI# */
+
 struct squashfs_super_block {
 	__le32 s_magic;
 	__le32 pad0[9];
@@ -93,6 +95,10 @@ int mtd_check_rootfs_magic(struct mtd_info *mtd, size_t offset,
 		if (type)
 			*type = MTDSPLIT_PART_TYPE_JFFS2;
 		return 0;
+	} else if (be32_to_cpu(magic) == UBI_EC_MAGIC) {
+		if (type)
+			*type = MTDSPLIT_PART_TYPE_UBI;
+		return 0;
 	}
 
 	return -EINVAL;
diff --git a/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit.h b/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit.h
index b757758..42841ef 100644
--- a/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit.h
+++ b/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit.h
@@ -22,6 +22,7 @@ enum mtdsplit_part_type {
 	MTDSPLIT_PART_TYPE_UNK = 0,
 	MTDSPLIT_PART_TYPE_SQUASHFS,
 	MTDSPLIT_PART_TYPE_JFFS2,
+	MTDSPLIT_PART_TYPE_UBI,
 };
 
 #ifdef CONFIG_MTD_SPLIT
-- 
1.8.4.5
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