btrfs: unify checking of IS_ERR and null

use IS_ERR_OR_NULL when possible, done by this coccinelle script:

@ match @
identifier id;
@@
(
- BUG_ON(IS_ERR(id) || !id);
+ BUG_ON(IS_ERR_OR_NULL(id));
|
- IS_ERR(id) || !id
+ IS_ERR_OR_NULL(id)
|
- !id || IS_ERR(id)
+ IS_ERR_OR_NULL(id)
)

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

1 files changed, 6 insertions, 6 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index fc966472e3ad..ba760c3ced28 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1855,7 +1855,7 @@ static int btrfs_io_failed_hook(struct bio *failed_bio,
                 }
                 read_unlock(&em_tree->lock);
 
-                if (!em || IS_ERR(em)) {
+                if (IS_ERR_OR_NULL(em)) {
                         kfree(failrec);
                         return -EIO;
                 }
@@ -3006,7 +3006,7 @@ int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
 
         di = btrfs_lookup_dir_item(trans, root, path, dir->i_ino,
                                    name, name_len, -1);
-        BUG_ON(!di || IS_ERR(di));
+        BUG_ON(IS_ERR_OR_NULL(di));
 
         leaf = path->nodes[0];
         btrfs_dir_item_key_to_cpu(leaf, di, &key);
@@ -3022,7 +3022,7 @@ int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
                 BUG_ON(ret != -ENOENT);
                 di = btrfs_search_dir_index_item(root, path, dir->i_ino,
                                                  name, name_len);
-                BUG_ON(!di || IS_ERR(di));
+                BUG_ON(IS_ERR_OR_NULL(di));
 
                 leaf = path->nodes[0];
                 btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
@@ -3032,7 +3032,7 @@ int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
 
         di = btrfs_lookup_dir_index_item(trans, root, path, dir->i_ino,
                                          index, name, name_len, -1);
-        BUG_ON(!di || IS_ERR(di));
+        BUG_ON(IS_ERR_OR_NULL(di));
 
         leaf = path->nodes[0];
         btrfs_dir_item_key_to_cpu(leaf, di, &key);
@@ -3635,7 +3635,7 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size)
         while (1) {
                 em = btrfs_get_extent(inode, NULL, 0, cur_offset,
                                 block_end - cur_offset, 0);
-                BUG_ON(IS_ERR(em) || !em);
+                BUG_ON(IS_ERR_OR_NULL(em));
                 last_byte = min(extent_map_end(em), block_end);
                 last_byte = (last_byte + mask) & ~mask;
                 if (!test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) {
@@ -3841,7 +3841,7 @@ static int btrfs_inode_by_name(struct inode *dir, struct dentry *dentry,
         if (IS_ERR(di))
                 ret = PTR_ERR(di);
 
-        if (!di || IS_ERR(di))
+        if (IS_ERR_OR_NULL(di))
                 goto out_err;
 
         btrfs_dir_item_key_to_cpu(path->nodes[0], di, location);