diff options
| author | Mike Snitzer <snitzer@redhat.com> | 2013-12-17 13:19:11 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-13 13:48:01 -0800 |
| commit | 025d61e0f163e55a7a7b08975640c5c75c2690b8 (patch) | |
| tree | 74e6680ea7a40072935b842eaea30eba2116af4f /drivers | |
| parent | 614319dfb0fb5da7fd2f96eb06df96bd3a04cbdd (diff) | |
dm thin: initialize dm_thin_new_mapping returned by get_next_mapping
commit 16961b042db8cc5cf75d782b4255193ad56e1d4f upstream.
As additional members are added to the dm_thin_new_mapping structure
care should be taken to make sure they get initialized before use.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Acked-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/dm-thin.c | 17 |
1 files changed, 6 insertions, 11 deletions
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c index d8f1d4e673f6..73c76c565a4d 100644 --- a/drivers/md/dm-thin.c +++ b/drivers/md/dm-thin.c @@ -760,13 +760,17 @@ static int ensure_next_mapping(struct pool *pool) static struct dm_thin_new_mapping *get_next_mapping(struct pool *pool) { - struct dm_thin_new_mapping *r = pool->next_mapping; + struct dm_thin_new_mapping *m = pool->next_mapping; BUG_ON(!pool->next_mapping); + memset(m, 0, sizeof(struct dm_thin_new_mapping)); + INIT_LIST_HEAD(&m->list); + m->bio = NULL; + pool->next_mapping = NULL; - return r; + return m; } static void schedule_copy(struct thin_c *tc, dm_block_t virt_block, @@ -778,15 +782,10 @@ static void schedule_copy(struct thin_c *tc, dm_block_t virt_block, struct pool *pool = tc->pool; struct dm_thin_new_mapping *m = get_next_mapping(pool); - INIT_LIST_HEAD(&m->list); - m->quiesced = 0; - m->prepared = 0; m->tc = tc; m->virt_block = virt_block; m->data_block = data_dest; m->cell = cell; - m->err = 0; - m->bio = NULL; if (!dm_deferred_set_add_work(pool->shared_read_ds, &m->list)) m->quiesced = 1; @@ -849,15 +848,12 @@ static void schedule_zero(struct thin_c *tc, dm_block_t virt_block, struct pool *pool = tc->pool; struct dm_thin_new_mapping *m = get_next_mapping(pool); - INIT_LIST_HEAD(&m->list); m->quiesced = 1; m->prepared = 0; m->tc = tc; m->virt_block = virt_block; m->data_block = data_block; m->cell = cell; - m->err = 0; - m->bio = NULL; /* * If the whole block of data is being overwritten or we are not @@ -1047,7 +1043,6 @@ static void process_discard(struct thin_c *tc, struct bio *bio) m->data_block = lookup_result.block; m->cell = cell; m->cell2 = cell2; - m->err = 0; m->bio = bio; if (!dm_deferred_set_add_work(pool->all_io_ds, &m->list)) { |