GitHub-Mirror/linux-bl808
2
0
Fork 0
mirror of https://github.com/Fishwaldo/linux-bl808.git synced 2025-06-17 20:25:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

btrfs: check NULL or not

Browse source 
Should check if functions returns NULL or not.

Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Tsutomu Itoh 2011-01-05 02:32:22 +00:00 • committed by Chris Mason
parent ff175d57f0
commit 91ca338d77
3 changed files with 16 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

6
fs/btrfs/ctree.c
View file

@ -2516,6 +2516,9 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_assert_tree_locked(path->nodes[1]); btrfs_assert_tree_locked(path->nodes[1]);
right = read_node_slot(root, upper, slot + 1); right = read_node_slot(root, upper, slot + 1);
if (right == NULL)
return 1;
btrfs_tree_lock(right); btrfs_tree_lock(right);
btrfs_set_lock_blocking(right); btrfs_set_lock_blocking(right);
@ -2766,6 +2769,9 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_assert_tree_locked(path->nodes[1]); btrfs_assert_tree_locked(path->nodes[1]);
left = read_node_slot(root, path->nodes[1], slot - 1); left = read_node_slot(root, path->nodes[1], slot - 1);
if (left == NULL)
return 1;
btrfs_tree_lock(left); btrfs_tree_lock(left);
btrfs_set_lock_blocking(left); btrfs_set_lock_blocking(left);

8
fs/btrfs/disk-io.c
View file

@ -353,6 +353,10 @@ static int csum_dirty_buffer(struct btrfs_root *root, struct page *page)
WARN_ON(len == 0); WARN_ON(len == 0);
eb = alloc_extent_buffer(tree, start, len, page, GFP_NOFS); eb = alloc_extent_buffer(tree, start, len, page, GFP_NOFS);
if (eb == NULL) {
WARN_ON(1);
goto out;
}
ret = btree_read_extent_buffer_pages(root, eb, start + PAGE_CACHE_SIZE, ret = btree_read_extent_buffer_pages(root, eb, start + PAGE_CACHE_SIZE,
btrfs_header_generation(eb)); btrfs_header_generation(eb));
BUG_ON(ret); BUG_ON(ret);
@ -427,6 +431,10 @@ static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end,
WARN_ON(len == 0); WARN_ON(len == 0);
eb = alloc_extent_buffer(tree, start, len, page, GFP_NOFS); eb = alloc_extent_buffer(tree, start, len, page, GFP_NOFS);
if (eb == NULL) {
ret = -EIO;
goto out;
}
found_start = btrfs_header_bytenr(eb); found_start = btrfs_header_bytenr(eb);
if (found_start != start) { if (found_start != start) {

2
fs/btrfs/extent_io.c
View file

@ -3075,6 +3075,8 @@ static struct extent_buffer *__alloc_extent_buffer(struct extent_io_tree *tree,
#endif #endif
eb = kmem_cache_zalloc(extent_buffer_cache, mask); eb = kmem_cache_zalloc(extent_buffer_cache, mask);
if (eb == NULL)
return NULL;
eb->start = start; eb->start = start;
eb->len = len; eb->len = len;
spin_lock_init(&eb->lock); spin_lock_init(&eb->lock);