diff options
Diffstat (limited to 'drivers/md/persistent-data/dm-block-manager.c')
| -rw-r--r-- | drivers/md/persistent-data/dm-block-manager.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/md/persistent-data/dm-block-manager.c b/drivers/md/persistent-data/dm-block-manager.c index 749ec268d957..54c089a50b15 100644 --- a/drivers/md/persistent-data/dm-block-manager.c +++ b/drivers/md/persistent-data/dm-block-manager.c @@ -493,7 +493,7 @@ int dm_bm_write_lock(struct dm_block_manager *bm, void *p; int r; - if (bm->read_only) + if (dm_bm_is_read_only(bm)) return -EPERM; p = dm_bufio_read(bm->bufio, b, (struct dm_buffer **) result); @@ -562,7 +562,7 @@ int dm_bm_write_lock_zero(struct dm_block_manager *bm, struct buffer_aux *aux; void *p; - if (bm->read_only) + if (dm_bm_is_read_only(bm)) return -EPERM; p = dm_bufio_new(bm->bufio, b, (struct dm_buffer **) result); @@ -602,7 +602,7 @@ EXPORT_SYMBOL_GPL(dm_bm_unlock); int dm_bm_flush(struct dm_block_manager *bm) { - if (bm->read_only) + if (dm_bm_is_read_only(bm)) return -EPERM; return dm_bufio_write_dirty_buffers(bm->bufio); @@ -616,19 +616,21 @@ void dm_bm_prefetch(struct dm_block_manager *bm, dm_block_t b) bool dm_bm_is_read_only(struct dm_block_manager *bm) { - return bm->read_only; + return (bm ? bm->read_only : true); } EXPORT_SYMBOL_GPL(dm_bm_is_read_only); void dm_bm_set_read_only(struct dm_block_manager *bm) { - bm->read_only = true; + if (bm) + bm->read_only = true; } EXPORT_SYMBOL_GPL(dm_bm_set_read_only); void dm_bm_set_read_write(struct dm_block_manager *bm) { - bm->read_only = false; + if (bm) + bm->read_only = false; } EXPORT_SYMBOL_GPL(dm_bm_set_read_write); |