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| author | Tejun Heo <tj@kernel.org> | 2011-02-24 09:56:32 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-02-24 17:55:55 +0100 |
| commit | e7407d1619713f4b1fdff3a485e1bd8e77bd480d (patch) | |
| tree | 18def7871239d5de7dea8cb115badb53d64fccb4 /kernel/mutex.h | |
| parent | mm: fix refcounting in swapon (diff) | |
| download | linux-e7407d1619713f4b1fdff3a485e1bd8e77bd480d.tar.xz linux-e7407d1619713f4b1fdff3a485e1bd8e77bd480d.zip | |
block: bd_link_disk_holder() should hold on to holder_dir
The new implementation of bd_link_disk_holder() added by 49731baa41d
(block: restore multiple bd_link_disk_holder() support) didn't get an
extra reference for the holder_dir kobject of the slave bdev; however,
bdev kills holder_dir on removal, not release, so if the slave bdev is
removed while there are holder links, the holder_dir will be destroyed
while there still are holder links, which leads to oops later when
bd_unlink_disk_order() tries to remove those links.
Make bd_link_disk_holder() grab an extra reference for the slave's
holder_dir and put it in bd_unlink_disk_holder().
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: "Hawrylewicz Czarnowski, Przemyslaw" <przemyslaw.hawrylewicz.czarnowski@intel.com>
Tested-by: "Hawrylewicz Czarnowski, Przemyslaw" <przemyslaw.hawrylewicz.czarnowski@intel.com>
Cc: Neil Brown <neilb@suse.de>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/mutex.h')
0 files changed, 0 insertions, 0 deletions