diff options
| author | Martin K. Petersen <martin.petersen@oracle.com> | 2015-07-22 07:57:12 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-08-03 09:29:58 -0700 |
| commit | 80c825f2facf71acf7e605f2ac555cf7fde14cc4 (patch) | |
| tree | ae381eeb9601031010578957b2c66a91a5260297 /drivers/media | |
| parent | 22029a0ccb163815f8ff3f0d41bb924565bed90b (diff) | |
block: Do a full clone when splitting discard bios
commit f3f5da624e0a891c34d8cd513c57f1d9b0c7dadc upstream.
This fixes a data corruption bug when using discard on top of MD linear,
raid0 and raid10 personalities.
Commit 20d0189b1012 "block: Introduce new bio_split()" permits sharing
the bio_vec between the two resulting bios. That is fine for read/write
requests where the bio_vec is immutable. For discards, however, we need
to be able to attach a payload and update the bio_vec so the page can
get mapped to a scatterlist entry. Therefore the bio_vec can not be
shared when splitting discards and we must do a full clone.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Reported-by: Seunguk Shin <seunguk.shin@samsung.com>
Tested-by: Seunguk Shin <seunguk.shin@samsung.com>
Cc: Seunguk Shin <seunguk.shin@samsung.com>
Cc: Jens Axboe <axboe@fb.com>
Cc: Kent Overstreet <kent.overstreet@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/media')
0 files changed, 0 insertions, 0 deletions