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| author | Mike Christie <michaelc@cs.wisc.edu> | 2006-12-01 12:40:55 +0300 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2006-12-01 12:40:55 +0300 |
| commit | 0e75f9063f5c55fb0b0b546a7c356f8ec186825e (patch) | |
| tree | db138f641175403546c2147def4b405f3ff453a8 /fs/bio.c | |
| parent | ad2d7225709b11da47e092634cbdf0591829ae9c (diff) | |
| download | linux-0e75f9063f5c55fb0b0b546a7c356f8ec186825e.tar.xz | |
[PATCH] block: support larger block pc requests
This patch modifies blk_rq_map/unmap_user() and the cdrom and scsi_ioctl.c
users so that it supports requests larger than bio by chaining them together.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'fs/bio.c')
| -rw-r--r-- | fs/bio.c | 18 |
1 files changed, 2 insertions, 16 deletions
@@ -560,10 +560,8 @@ struct bio *bio_copy_user(request_queue_t *q, unsigned long uaddr, break; } - if (bio_add_pc_page(q, bio, page, bytes, 0) < bytes) { - ret = -EINVAL; + if (bio_add_pc_page(q, bio, page, bytes, 0) < bytes) break; - } len -= bytes; } @@ -750,7 +748,6 @@ struct bio *bio_map_user_iov(request_queue_t *q, struct block_device *bdev, int write_to_vm) { struct bio *bio; - int len = 0, i; bio = __bio_map_user_iov(q, bdev, iov, iov_count, write_to_vm); @@ -765,18 +762,7 @@ struct bio *bio_map_user_iov(request_queue_t *q, struct block_device *bdev, */ bio_get(bio); - for (i = 0; i < iov_count; i++) - len += iov[i].iov_len; - - if (bio->bi_size == len) - return bio; - - /* - * don't support partial mappings - */ - bio_endio(bio, bio->bi_size, 0); - bio_unmap_user(bio); - return ERR_PTR(-EINVAL); + return bio; } static void __bio_unmap_user(struct bio *bio) |