dm crypt: tidy sector

Prepare local sector variable (offset) for later patch.
Do not update io->sector for still-running I/O.

No functional change.

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 8939cba6e748cc0a56cb13fc2b9e69ceea8344d1..ad98ded3008cd9367927af8974b181f249c60b8e 100644 (file)
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -688,7 +688,6 @@ static void kcryptd_crypt_write_io_submit(struct dm_crypt_io *io,
        BUG_ON(io->ctx.idx_out < clone->bi_vcnt);
 
        clone->bi_sector = cc->start + io->sector;
-       io->sector += bio_sectors(clone);
 
        if (async)
                kcryptd_queue_io(io);
@@ -703,13 +702,14 @@ static void kcryptd_crypt_write_convert(struct dm_crypt_io *io)
        int crypt_finished;
        unsigned out_of_pages = 0;
        unsigned remaining = io->base_bio->bi_size;
+       sector_t sector = io->sector;
        int r;
 
        /*
         * Prevent io from disappearing until this function completes.
         */
        crypt_inc_pending(io);
-       crypt_convert_init(cc, &io->ctx, NULL, io->base_bio, io->sector);
+       crypt_convert_init(cc, &io->ctx, NULL, io->base_bio, sector);
 
        /*
         * The allocated buffers can be smaller than the whole bio,
@@ -726,6 +726,7 @@ static void kcryptd_crypt_write_convert(struct dm_crypt_io *io)
                io->ctx.idx_out = 0;
 
                remaining -= clone->bi_size;
+               sector += bio_sectors(clone);
 
                crypt_inc_pending(io);
                r = crypt_convert(cc, &io->ctx);
@@ -741,6 +742,8 @@ static void kcryptd_crypt_write_convert(struct dm_crypt_io *io)
                         */
                        if (unlikely(r < 0))
                                break;
+
+                       io->sector = sector;
                }
 
                /*