tree e70a5d8babcae1ec25c0df0722291b31df62a7cb
parent f894e74dc1983062d30d4e1b79bdb90b8a847f52
author FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> 1238717540 +0900
committer James Bottomley <James.Bottomley@HansenPartnership.com> 1238768723 -0500

[SCSI] sg: fix iovec bugs introduced by the block layer conversion

- needs to use copy_from_user for iovec before passing it to
blk_rq_map_user_iov().

- before the block layer conversion, if ->dxfer_len and sum of iovec
disagrees, the shorter one wins. However, currently sg returns
-EINVAL. This restores the old behavior.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Cc: stable@kernel.org
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>