diff options
| author | Mike Snitzer <snitzer@redhat.com> | 2017-06-21 02:14:30 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-11 18:21:30 +0300 |
| commit | b6f93a1341fb166ea861aa37eeac492af3de837a (patch) | |
| tree | 1b953292a2f1a16cf39dfec75ff3541c755f3bb6 /arch/arm | |
| parent | 6213c714a580c34751f9501725369fc5e0fe71e5 (diff) | |
| download | linux-b6f93a1341fb166ea861aa37eeac492af3de837a.tar.xz | |
dm io: fix duplicate bio completion due to missing ref count
commit feb7695fe9fb83084aa29de0094774f4c9d4c9fc upstream.
If only a subset of the devices associated with multiple regions support
a given special operation (eg. DISCARD) then the dec_count() that is
used to set error for the region must increment the io->count.
Otherwise, when the dec_count() is called it can cause the dm-io
caller's bio to be completed multiple times. As was reported against
the dm-mirror target that had mirror legs with a mix of discard
capabilities.
Bug: https://bugzilla.kernel.org/show_bug.cgi?id=196077
Reported-by: Zhang Yi <yizhan@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/arm')
0 files changed, 0 insertions, 0 deletions