Hello Liu Bo,
The patch 64c043de466d: "Btrfs: fix up read_tree_block to return
proper error" from May 25, 2015, leads to the following static
checker warning:
fs/btrfs/relocation.c:1858 replace_path()
error: 'eb' dereferencing possible ERR_PTR()
fs/btrfs/relocation.c
1850 eb = read_tree_block(dest, old_bytenr,
old_ptr_gen);
1851 if (IS_ERR(eb)) {
^^^^^^^^^^
1852 ret = PTR_ERR(eb);
Missing break or continue?
1853 } else if (!extent_buffer_uptodate(eb)) {
1854 ret = -EIO;
1855 free_extent_buffer(eb);
1856 break;
1857 }
1858 btrfs_tree_lock(eb);
^^
Dereference.
1859 if (cow) {
1860 ret = btrfs_cow_block(trans, dest, eb,
parent,
1861 slot, &eb);
regards,
dan carpenter
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