cmd: ubifs: Factor out some checking codes into cmd_ubifs_mount()

cmd_ubifs_mount() function would be called directly instead of
involving whole command machinery for mounting ubifs in
generic firmware loader, so some checking codes need to be factored out
into cmd_ubifs_mount() without breaking original functionality design.

Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Heiko Schocher <hs@denx.de>

cmd/ubifs.c

@@ -19,16 +19,10 @@
 static int ubifs_initialized;
 static int ubifs_mounted;
 
-static int do_ubifs_mount(cmd_tbl_t *cmdtp, int flag, int argc,
-				char * const argv[])
+int cmd_ubifs_mount(char *vol_name)
 {
-	char *vol_name;
 	int ret;
 
-	if (argc != 2)
-		return CMD_RET_USAGE;
-
-	vol_name = argv[1];
 	debug("Using volume %s\n", vol_name);
 
 	if (ubifs_initialized == 0) {
@@ -42,7 +36,19 @@ static int do_ubifs_mount(cmd_tbl_t *cmdtp, int flag, int argc,
 
 	ubifs_mounted = 1;
 
-	return 0;
+	return ret;
+}
+static int do_ubifs_mount(cmd_tbl_t *cmdtp, int flag, int argc,
+				char * const argv[])
+{
+	char *vol_name;
+
+	if (argc != 2)
+		return CMD_RET_USAGE;
+
+	vol_name = argv[1];
+
+	return cmd_ubifs_mount(vol_name);
 }
 
 int ubifs_is_mounted(void)

include/ubi_uboot.h

@@ -75,6 +75,7 @@ extern int ubi_volume_write(char *volume, void *buf, size_t size);
 extern int ubi_volume_read(char *volume, char *buf, size_t size);
 
 extern struct ubi_device *ubi_devices[];
+int cmd_ubifs_mount(char *vol_name);
 int cmd_ubifs_umount(void);
 
 #endif