android_kernel_xiaomi_sm8350/fs/ocfs2
Linus Torvalds 8f443e2372 Revert "ocfs2: incorrect check for debugfs returns"
This reverts commit e2ac55b6a8.

Huang Ying reports that this causes a hang at boot with debugfs disabled.

It is true that the debugfs error checks are kind of confusing, and this
code certainly merits more cleanup and thinking about it, but there's
something wrong with the trivial "check not just for NULL, but for error
pointers too" patch.

Yes, with debugfs disabled, we will end up setting the o2hb_debug_dir
pointer variable to an error pointer (-ENODEV), and then continue as if
everything was fine.  But since debugfs is disabled, all the _users_ of
that pointer end up being compiled away, so even though the pointer can
not be dereferenced, that's still fine.

So it's confusing and somewhat questionable, but the "more correct"
error checks end up causing more trouble than they fix.

Reported-by: Huang Ying <ying.huang@intel.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Chengyu Song <csong84@gatech.edu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-21 09:17:28 -07:00
..
cluster Revert "ocfs2: incorrect check for debugfs returns" 2015-04-21 09:17:28 -07:00
dlm o2dlm: fix NULL pointer dereference in o2dlm_blocking_ast_wrapper 2015-02-10 14:30:30 -08:00
dlmfs fs: remove mapping->backing_dev_info 2015-01-20 14:03:05 -07:00
acl.c ocfs2: remove unnecessary else in ocfs2_set_acl() 2015-02-10 14:30:28 -08:00
acl.h ocfs2: use generic posix ACL infrastructure 2014-01-25 23:58:21 -05:00
alloc.c ocfs2: one function call less in ocfs2_merge_rec_right() after error detection 2015-04-14 16:48:57 -07:00
alloc.h ocfs2: reflink: fix slow unlink for refcounted file 2014-12-18 19:08:11 -08:00
aops.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-04-16 23:27:56 -04:00
aops.h fs: move struct kiocb to fs.h 2015-03-25 20:28:11 -04:00
blockcheck.c
blockcheck.h
buffer_head_io.c ocfs2: do not put bh when buffer_uptodate failed 2014-04-03 16:20:56 -07:00
buffer_head_io.h
dcache.c assorted conversions to %p[dD] 2014-11-19 13:01:20 -05:00
dcache.h ocfs2: revert iput deferring code in ocfs2_drop_dentry_lock 2014-04-03 16:20:55 -07:00
dir.c ocfs2: fix a typo in the copyright statement 2015-04-14 16:48:58 -07:00
dir.h [readdir] convert ocfs2 2013-06-29 12:57:02 +04:00
dlmglue.c Revert "ocfs2: incorrect check for debugfs returns" 2015-04-21 09:17:28 -07:00
dlmglue.h ocfs2: avoid blocking in ocfs2_mark_lockres_freeing() in downconvert thread 2014-04-03 16:20:55 -07:00
export.c ocfs2: fix possible uninitialized variable access 2015-04-14 16:48:58 -07:00
export.h
extent_map.c ocfs2: fix the end cluster offset of FIEMAP 2013-09-11 15:56:53 -07:00
extent_map.h
file.c Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-04-15 13:22:56 -07:00
file.h ocfs2: prepare some interfaces used in append direct io 2015-02-16 17:56:04 -08:00
heartbeat.c
heartbeat.h
inode.c ocfs2: use ENOENT instead of EEXIST when get system file fails 2015-04-14 16:48:58 -07:00
inode.h ocfs2: wait for orphan recovery first once append O_DIRECT write crash 2015-02-16 17:56:05 -08:00
ioctl.c ocfs2: do not write error flag to user structure we cannot copy from/to 2014-08-29 16:28:16 -07:00
ioctl.h
journal.c ocfs2: wait for orphan recovery first once append O_DIRECT write crash 2015-02-16 17:56:05 -08:00
journal.h ocfs2: add functions to add and remove inode in orphan dir 2015-02-16 17:56:04 -08:00
Kconfig
localalloc.c ocfs2: fix possible uninitialized variable access 2015-04-14 16:48:58 -07:00
localalloc.h ocfs2: free allocated clusters if error occurs after ocfs2_claim_clusters 2014-02-06 13:48:51 -08:00
locks.c ocfs2: flock: drop cross-node lock when failed locally 2014-04-03 16:20:56 -07:00
locks.h
Makefile ocfs2: remove versioning information 2014-01-21 16:19:41 -08:00
mmap.c mm: drop vm_ops->remap_pages and generic_file_remap_pages() stub 2015-02-10 14:30:30 -08:00
mmap.h
move_extents.c ocfs2: remove bogus NULL check in ocfs2_move_extents() 2014-12-10 17:41:04 -08:00
move_extents.h
namei.c ocfs2: use ENOENT instead of EEXIST when get system file fails 2015-04-14 16:48:58 -07:00
namei.h ocfs2: add functions to add and remove inode in orphan dir 2015-02-16 17:56:04 -08:00
ocfs1_fs_compat.h
ocfs2_fs.h ocfs2: make append_dio an incompat feature 2015-03-12 18:46:07 -07:00
ocfs2_ioctl.h
ocfs2_lockid.h
ocfs2_lockingver.h
ocfs2_trace.h ocfs2: fix a tiny race when running dirop_fileop_racer 2014-06-23 16:47:45 -07:00
ocfs2.h ocfs2: make append_dio an incompat feature 2015-03-12 18:46:07 -07:00
quota_global.c ocfs2: Don't use MAXQUOTAS value 2014-09-17 11:59:12 +02:00
quota_local.c Merge branch 'akpm' (patches from Andrew) 2015-02-10 16:45:56 -08:00
quota.h ocfs2: Move OLQF_CLEAN flag out of generic quota flags 2015-01-21 19:21:30 +01:00
refcounttree.c ocfs2: dereferencing freed pointers in ocfs2_reflink() 2015-04-14 16:48:57 -07:00
refcounttree.h ocfs2: fix NULL pointer dereference in ocfs2_duplicate_clusters_by_page 2013-08-13 17:57:49 -07:00
reservations.c ocfs2: make resv_lock spinlock static 2015-02-10 14:30:29 -08:00
reservations.h
resize.c ocfs2: fix incorrect i_size of global bitmap inode after resize 2014-06-04 16:53:54 -07:00
resize.h
slot_map.c ocfs2: one function call less in ocfs2_init_slot_info() after error detection 2015-04-14 16:48:57 -07:00
slot_map.h
stack_o2cb.c ocfs2: avoid a pointless delay in o2cb_cluster_check() 2015-04-14 16:48:57 -07:00
stack_user.c ocfs2: one function call less in user_cluster_connect() after error detection 2015-04-14 16:48:57 -07:00
stackglue.c ocfs2: remove NULL assignments on static 2014-06-04 16:53:53 -07:00
stackglue.h ocfs2: pass ocfs2_cluster_connection to ocfs2_this_node 2014-01-21 16:19:41 -08:00
suballoc.c ocfs2: rollback the cleared bits if error occurs after ocfs2_block_group_clear_bits 2015-04-14 16:48:58 -07:00
suballoc.h ocfs2: rollback alloc_dinode counts when ocfs2_block_group_set_bits() failed 2014-04-03 16:20:56 -07:00
super.c Revert "ocfs2: incorrect check for debugfs returns" 2015-04-21 09:17:28 -07:00
super.h
symlink.c ocfs2: Fix oops in ocfs2_fast_symlink_readpage() code path 2013-02-26 02:46:12 -05:00
symlink.h
sysfile.c ocfs2: avoid system inode ref confusion by adding mutex lock 2014-04-03 16:20:57 -07:00
sysfile.h
uptodate.c ocfs2: remove NULL assignments on static 2014-06-04 16:53:53 -07:00
uptodate.h
xattr.c ocfs2: fix possible uninitialized variable access 2015-04-14 16:48:58 -07:00
xattr.h ocfs2: use generic posix ACL infrastructure 2014-01-25 23:58:21 -05:00