[PATCH] btrfs-progs: simplify mkfs_main cleanup

[Mark Harmstone <maharmstone@fb.com>]

mkfs_main is a main-like function, meaning that return and exit are
equivalent. Deduplicate code by adding a new out2 label.

Signed-off-by: Mark Harmstone <maharmstone@fb.com>
---
 mkfs/main.c | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/mkfs/main.c b/mkfs/main.c
index a69aa24b..5705acb6 100644
--- a/mkfs/main.c
+++ b/mkfs/main.c
@@ -1915,6 +1915,8 @@ out:
 	}
 
 	btrfs_close_all_devices();
+
+out2:
 	if (prepare_ctx) {
 		for (i = 0; i < device_count; i++)
 			close(prepare_ctx[i].fd);
@@ -1927,15 +1929,9 @@ out:
 	return !!ret;
 
 error:
-	if (prepare_ctx) {
-		for (i = 0; i < device_count; i++)
-			close(prepare_ctx[i].fd);
-	}
-	free(t_prepare);
-	free(prepare_ctx);
-	free(label);
-	free(source_dir);
-	exit(1);
+	ret = 1;
+	goto out2;
+
 success:
 	exit(0);
 }
-- 
2.44.2