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| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2008-12-18 14:49:37 +0900 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2009-01-02 11:10:08 -0600 |
| commit | 56c451f4b583ccdf80c9e676179c9cb49de86745 (patch) | |
| tree | 7ad9daeafb88e3c4390bf7a2db0c203fe2642728 /block | |
| parent | e623ddb4e940b266adc77ba1cc28a3554aa90e79 (diff) | |
| download | lwn-56c451f4b583ccdf80c9e676179c9cb49de86745.tar.gz lwn-56c451f4b583ccdf80c9e676179c9cb49de86745.zip | |
[SCSI] block: fix the partial mappings with struct rq_map_data
This fixes bio_copy_user_iov to properly handle the partial mappings
with struct rq_map_data (which only sg uses for now but st and osst
will shortly). It adds the offset member to struct rq_map_data and
changes blk_rq_map_user to update it so that bio_copy_user_iov can add
an appropriate page frame via bio_add_pc_page().
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-map.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/block/blk-map.c b/block/blk-map.c index 2990447f45e9..c7e55b23a2bc 100644 --- a/block/blk-map.c +++ b/block/blk-map.c @@ -150,6 +150,9 @@ int blk_rq_map_user(struct request_queue *q, struct request *rq, bio = rq->bio; bytes_read += ret; ubuf += ret; + + if (map_data) + map_data->offset += ret; } if (!bio_flagged(bio, BIO_USER_MAPPED)) |