Also remove unused path in extent-tree.c:finish_current_insert().

Signed-off-by: Filipe David Borba Manana <fdman...@gmail.com>
---

V2: added 1 more path alloc check and removed unnecessary path
    allocation in extent-tree.c:finish_current_insert().
V3: added missing path alloc checks to dir-item.c, file-item.c
    and btrfs-corrupt-block.c too.

 btrfs-corrupt-block.c |    2 ++
 dir-item.c            |    2 ++
 extent-tree.c         |    8 ++++----
 file-item.c           |    2 ++
 4 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/btrfs-corrupt-block.c b/btrfs-corrupt-block.c
index 8176fad..22facd4 100644
--- a/btrfs-corrupt-block.c
+++ b/btrfs-corrupt-block.c
@@ -159,6 +159,8 @@ static int corrupt_extent(struct btrfs_trans_handle *trans,
        int should_del = rand() % 3;
 
        path = btrfs_alloc_path();
+       if (!path)
+               return -ENOMEM;
 
        key.objectid = bytenr;
        key.type = (u8)-1;
diff --git a/dir-item.c b/dir-item.c
index f00485a..0ab3c5e 100644
--- a/dir-item.c
+++ b/dir-item.c
@@ -123,6 +123,8 @@ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, 
struct btrfs_root
        btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY);
        key.offset = btrfs_name_hash(name, name_len);
        path = btrfs_alloc_path();
+       if (!path)
+               return -ENOMEM;
        data_size = sizeof(*dir_item) + name_len;
        dir_item = insert_with_overflow(trans, root, path, &key, data_size,
                                        name, name_len);
diff --git a/extent-tree.c b/extent-tree.c
index f597e16..e4adaa3 100644
--- a/extent-tree.c
+++ b/extent-tree.c
@@ -1487,6 +1487,8 @@ int btrfs_lookup_extent_info(struct btrfs_trans_handle 
*trans,
        }
 
        path = btrfs_alloc_path();
+       if (!path)
+               return -ENOMEM;
        path->reada = 1;
 
        key.objectid = bytenr;
@@ -1577,6 +1579,8 @@ int btrfs_set_block_flags(struct btrfs_trans_handle 
*trans,
                                  BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA);
 
        path = btrfs_alloc_path();
+       if (!path)
+               return -ENOMEM;
        path->reada = 1;
 
        key.objectid = bytenr;
@@ -2078,7 +2082,6 @@ static int finish_current_insert(struct 
btrfs_trans_handle *trans,
        u64 end;
        u64 priv;
        struct btrfs_fs_info *info = extent_root->fs_info;
-       struct btrfs_path *path;
        struct pending_extent_op *extent_op;
        struct btrfs_key key;
        int ret;
@@ -2086,8 +2089,6 @@ static int finish_current_insert(struct 
btrfs_trans_handle *trans,
                btrfs_fs_incompat(extent_root->fs_info,
                                  BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA);
 
-       path = btrfs_alloc_path();
-
        while(1) {
                ret = find_first_extent_bit(&info->extent_ins, 0, &start,
                                            &end, EXTENT_LOCKED);
@@ -2121,7 +2122,6 @@ static int finish_current_insert(struct 
btrfs_trans_handle *trans,
                                  GFP_NOFS);
                kfree(extent_op);
        }
-       btrfs_free_path(path);
        return 0;
 }
 
diff --git a/file-item.c b/file-item.c
index 9c787f0..82bf99e 100644
--- a/file-item.c
+++ b/file-item.c
@@ -417,6 +417,8 @@ int btrfs_del_csums(struct btrfs_trans_handle *trans,
        root = root->fs_info->csum_root;
 
        path = btrfs_alloc_path();
+       if (!path)
+               return -ENOMEM;
 
        while (1) {
                key.objectid = BTRFS_EXTENT_CSUM_OBJECTID;
-- 
1.7.9.5

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