tree 7ad9daeafb88e3c4390bf7a2db0c203fe2642728
parent e623ddb4e940b266adc77ba1cc28a3554aa90e79
author FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> 1229579377 +0900
committer James Bottomley <James.Bottomley@HansenPartnership.com> 1230916208 -0600

[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>