diff options
| -rw-r--r-- | drivers/md/dm-verity-target.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c index 4fb33e7562c5..0d61e9c67986 100644 --- a/drivers/md/dm-verity-target.c +++ b/drivers/md/dm-verity-target.c @@ -611,8 +611,22 @@ no_prefetch_cluster: static void verity_submit_prefetch(struct dm_verity *v, struct dm_verity_io *io) { + sector_t block = io->block; + unsigned int n_blocks = io->n_blocks; struct dm_verity_prefetch_work *pw; + if (v->validated_blocks) { + while (n_blocks && test_bit(block, v->validated_blocks)) { + block++; + n_blocks--; + } + while (n_blocks && test_bit(block + n_blocks - 1, + v->validated_blocks)) + n_blocks--; + if (!n_blocks) + return; + } + pw = kmalloc(sizeof(struct dm_verity_prefetch_work), GFP_NOIO | __GFP_NORETRY | __GFP_NOMEMALLOC | __GFP_NOWARN); @@ -621,8 +635,8 @@ static void verity_submit_prefetch(struct dm_verity *v, struct dm_verity_io *io) INIT_WORK(&pw->work, verity_prefetch_io); pw->v = v; - pw->block = io->block; - pw->n_blocks = io->n_blocks; + pw->block = block; + pw->n_blocks = n_blocks; queue_work(v->verify_wq, &pw->work); } |