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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 /fs/bio.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 'fs/bio.c')
| -rw-r--r-- | fs/bio.c | 2 |
1 files changed, 1 insertions, 1 deletions
@@ -859,7 +859,7 @@ struct bio *bio_copy_user_iov(struct request_queue *q, /* * success */ - if (!write_to_vm) { + if (!write_to_vm && (!map_data || !map_data->null_mapped)) { ret = __bio_copy_iov(bio, bio->bi_io_vec, iov, iov_count, 0, 0); if (ret) goto cleanup; |