diff options
| author | Kent Overstreet <koverstreet@google.com> | 2012-09-04 15:20:38 -0700 |
|---|---|---|
| committer | Kent Overstreet <koverstreet@google.com> | 2013-03-23 14:15:30 -0700 |
| commit | 5b83636ae3c3b4f87d02a5929ad4dee831534db0 (patch) | |
| tree | 90b902fe8797c11d4f76d08353e44bbf82a850e1 /drivers/md | |
| parent | aa8b57aa3d1c06ca53312294ee6dfc767ee3ddb3 (diff) | |
block: Change bio_split() to respect the current value of bi_idx
In the current code bio_split() won't be seeing partially completed bios
so this doesn't change any behaviour, but this makes the code a bit
clearer as to what bio_split() actually requires.
The immediate purpose of the patch is removing unnecessary bi_idx
references, but the end goal is to allow partial completed bios to be
submitted, which along with immutable biovecs enables effecient bio
splitting.
Some of the callers were (double) checking that bios could be split, so
update their checks too.
Signed-off-by: Kent Overstreet <koverstreet@google.com>
CC: Jens Axboe <axboe@kernel.dk>
CC: Lars Ellenberg <drbd-dev@lists.linbit.com>
CC: Neil Brown <neilb@suse.de>
CC: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/raid0.c | 3 | ||||
| -rw-r--r-- | drivers/md/raid10.c | 3 |
2 files changed, 2 insertions, 4 deletions
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c index 23a38afec35..fcf65e512cf 100644 --- a/drivers/md/raid0.c +++ b/drivers/md/raid0.c @@ -527,8 +527,7 @@ static void raid0_make_request(struct mddev *mddev, struct bio *bio) sector_t sector = bio->bi_sector; struct bio_pair *bp; /* Sanity check -- queue functions should prevent this happening */ - if ((bio->bi_vcnt != 1 && bio->bi_vcnt != 0) || - bio->bi_idx != 0) + if (bio_segments(bio) > 1) goto bad_map; /* This is a one page bio that upper layers * refuse to split for us, so we need to split it. diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 5ee14ab16a0..2e29df960bf 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -1175,8 +1175,7 @@ static void make_request(struct mddev *mddev, struct bio * bio) || conf->prev.near_copies < conf->prev.raid_disks))) { struct bio_pair *bp; /* Sanity check -- queue functions should prevent this happening */ - if ((bio->bi_vcnt != 1 && bio->bi_vcnt != 0) || - bio->bi_idx != 0) + if (bio_segments(bio) > 1) goto bad_map; /* This is a one page bio that upper layers * refuse to split for us, so we need to split it. |