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| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2008-12-18 14:49:38 +0900 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2009-01-02 11:10:35 -0600 |
| commit | 97ae77a1cd332c7b011d71315c8faabce6840c72 (patch) | |
| tree | fc243ca28ea474eaf81729079eeb3b259cd1b81b /drivers/scsi/sg.c | |
| parent | 56c451f4b583ccdf80c9e676179c9cb49de86745 (diff) | |
| download | lwn-97ae77a1cd332c7b011d71315c8faabce6840c72.tar.gz lwn-97ae77a1cd332c7b011d71315c8faabce6840c72.zip | |
[SCSI] block: make blk_rq_map_user take a NULL user-space buffer for WRITE
The commit 818827669d85b84241696ffef2de485db46b0b5e (block: make
blk_rq_map_user take a NULL user-space buffer) extended
blk_rq_map_user to accept a NULL user-space buffer with a READ
command. It was necessary to convert sg to use the block layer mapping
API.
This patch extends blk_rq_map_user again for a WRITE command. It is
necessary to convert st and osst drivers to use the block layer
apping API.
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 'drivers/scsi/sg.c')
| -rw-r--r-- | drivers/scsi/sg.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index 7d0b3d9ee43b..8f0bd3f7a59f 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -1670,6 +1670,7 @@ static int sg_start_req(Sg_request *srp, unsigned char *cmd) md->page_order = req_schp->page_order; md->nr_entries = req_schp->k_use_sg; md->offset = 0; + md->null_mapped = hp->dxferp ? 0 : 1; } if (iov_count) |