[U-Boot] [PATCH v3 2/7] ubi: add new ubi command "ubi detach"

[Heiko Schocher <hs@denx.de>]

simple detachs ubi from the mtd partition.

Signed-off-by: Heiko Schocher <hs@denx.de>

---

Changes in v2:
- add comments from Scott Wood:
  - correct spelling error "dettach" -> "detach"
  - use "oss at buserror.net" as email address for Scott
- rebase to current mainline commit id:
  e4a94ce4ac77396b181663c0493c50bc2d5b9143

 cmd/ubi.c | 38 +++++++++++++++++++++++++++-----------
 1 file changed, 27 insertions(+), 11 deletions(-)

diff --git a/cmd/ubi.c b/cmd/ubi.c
index 753a4db..4a92d84 100644
--- a/cmd/ubi.c
+++ b/cmd/ubi.c
@@ -443,14 +443,8 @@ static int ubi_dev_scan(struct mtd_info *info, char *ubidev,
 	return 0;
 }
 
-int ubi_part(char *part_name, const char *vid_header_offset)
+int ubi_detach(void)
 {
-	int err = 0;
-	char mtd_dev[16];
-	struct mtd_device *dev;
-	struct part_info *part;
-	u8 pnum;
-
 	if (mtdparts_init() != 0) {
 		printf("Error initializing mtdparts!\n");
 		return 1;
@@ -466,17 +460,28 @@ int ubi_part(char *part_name, const char *vid_header_offset)
 		cmd_ubifs_umount();
 #endif
 
-	/* todo: get dev number for NAND... */
-	ubi_dev.nr = 0;
-
 	/*
 	 * Call ubi_exit() before re-initializing the UBI subsystem
 	 */
 	if (ubi_initialized) {
 		ubi_exit();
 		del_mtd_partitions(ubi_dev.mtd_info);
+		ubi_initialized = 0;
 	}
 
+	ubi_dev.selected = 0;
+	return 0;
+}
+
+int ubi_part(char *part_name, const char *vid_header_offset)
+{
+	int err = 0;
+	char mtd_dev[16];
+	struct mtd_device *dev;
+	struct part_info *part;
+	u8 pnum;
+
+	ubi_detach();
 	/*
 	 * Search the mtd device number where this partition
 	 * is located
@@ -517,6 +522,15 @@ static int do_ubi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 	if (argc < 2)
 		return CMD_RET_USAGE;
 
+
+	if (strcmp(argv[1], "detach") == 0) {
+		if (argc < 2)
+			return CMD_RET_USAGE;
+
+		return ubi_detach();
+	}
+
+
 	if (strcmp(argv[1], "part") == 0) {
 		const char *vid_header_offset = NULL;
 
@@ -661,7 +675,9 @@ static int do_ubi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 U_BOOT_CMD(
 	ubi, 6, 1, do_ubi,
 	"ubi commands",
-	"part [part] [offset]\n"
+	"detach"
+		" - detach ubi from a mtd partition\n"
+	"ubi part [part] [offset]\n"
 		" - Show or set current partition (with optional VID"
 		" header offset)\n"
 	"ubi info [l[ayout]]"
-- 
2.5.5