btrfs: Don't BUG_ON alloc_path errors in replay_one_buffer()

The two ->process_func call sites in tree-log.c which were ignoring a return
code have also been updated to gracefully exit as well.

Signed-off-by: Mark Fasheh <mfasheh@suse.com>

1 files changed, 9 insertions, 3 deletions

diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 4ce8a9f41d1e..f3cacc079102 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -1617,7 +1617,8 @@ static int replay_one_buffer(struct btrfs_root *log, struct extent_buffer *eb,
                 return 0;
 
         path = btrfs_alloc_path();
-        BUG_ON(!path);
+        if (!path)
+                return -ENOMEM;
 
         nritems = btrfs_header_nritems(eb);
         for (i = 0; i < nritems; i++) {
@@ -1723,7 +1724,9 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans,
                         return -ENOMEM;
 
                 if (*level == 1) {
-                        wc->process_func(root, next, wc, ptr_gen);
+                        ret = wc->process_func(root, next, wc, ptr_gen);
+                        if (ret)
+                                return ret;
 
                         path->slots[*level]++;
                         if (wc->free) {
@@ -1788,8 +1791,11 @@ static noinline int walk_up_log_tree(struct btrfs_trans_handle *trans,
                                 parent = path->nodes[*level + 1];
 
                         root_owner = btrfs_header_owner(parent);
-                        wc->process_func(root, path->nodes[*level], wc,
+                        ret = wc->process_func(root, path->nodes[*level], wc,
                                  btrfs_header_generation(path->nodes[*level]));
+                        if (ret)
+                                return ret;
+
                         if (wc->free) {
                                 struct extent_buffer *next;