btrfs-progs: image: return negativer error from all paths in mdrestore_init

Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/btrfs-image.c b/btrfs-image.c
index bbe4f63..46d3196 100644 (file)
--- a/btrfs-image.c
+++ b/btrfs-image.c
@@ -1880,8 +1880,11 @@ static int mdrestore_init(struct mdrestore_struct *mdres,
        for (i = 0; i < num_threads; i++) {
                ret = pthread_create(mdres->threads + i, NULL, restore_worker,
                                     mdres);
-               if (ret)
+               if (ret) {
+                       /* pthread_create returns errno directly */
+                       ret = -ret;
                        break;
+               }
        }
        if (ret)
                mdrestore_destroy(mdres, i + 1);