diff options
| author | Mike Snitzer <snitzer@redhat.com> | 2017-06-20 19:14:30 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-11 16:19:47 +0100 |
| commit | bb97a65730f975743b2d95b5cecadc5a254c0159 (patch) | |
| tree | 325a85bcf5facf5f4b22c8e711e467d3ced6d5b4 /drivers/cpuidle | |
| parent | e7f17d033e58acce9df40bc44ed804720417ca2e (diff) | |
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 'drivers/cpuidle')
0 files changed, 0 insertions, 0 deletions