cmd: ubifs: Move ubifs_initialized checking into cmd_ubifs_umount()

cmd_ubifs_umount() function would be called directly instead of involving
whole command machinery in generic firmware loader, so checking on
ubifs_initialized status need to be done in cmd_ubifs_umount() 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>
[trini: Fix conflicting type error in cmd/ubi.c]
Signed-off-by: Tom Rini <trini@konsulko.com>

cmd/ubi.c

@@ -47,8 +47,7 @@ struct selected_dev {
 static struct selected_dev ubi_dev;
 
 #ifdef CONFIG_CMD_UBIFS
-int ubifs_is_mounted(void);
-void cmd_ubifs_umount(void);
+#include <ubifs_uboot.h>
 #endif
 
 static void display_volume_info(struct ubi_device *ubi)

cmd/ubifs.c

@@ -50,11 +50,18 @@ int ubifs_is_mounted(void)
 	return ubifs_mounted;
 }
 
-void cmd_ubifs_umount(void)
+int cmd_ubifs_umount(void)
 {
+	if (ubifs_initialized == 0) {
+		printf("No UBIFS volume mounted!\n");
+		return -1;
+	}
+
 	uboot_ubifs_umount();
 	ubifs_mounted = 0;
 	ubifs_initialized = 0;
+
+	return 0;
 }
 
 static int do_ubifs_umount(cmd_tbl_t *cmdtp, int flag, int argc,
@@ -63,14 +70,7 @@ static int do_ubifs_umount(cmd_tbl_t *cmdtp, int flag, int argc,
 	if (argc != 1)
 		return CMD_RET_USAGE;
 
-	if (ubifs_initialized == 0) {
-		printf("No UBIFS volume mounted!\n");
-		return -1;
-	}
-
-	cmd_ubifs_umount();
-
-	return 0;
+	return cmd_ubifs_umount();
 }
 
 static int do_ubifs_ls(cmd_tbl_t *cmdtp, int flag, int argc,

include/ubi_uboot.h

@@ -75,5 +75,6 @@ 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_umount(void);
 
 #endif