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block: Add submit_bio_wait(), remove from md

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Random cleanup - this code was duplicated and it's not really specific
to md.

Also added the ability to return the actual error code.

Signed-off-by: Kent Overstreet <koverstreet@google.com>
CC: Jens Axboe <axboe@kernel.dk>
CC: NeilBrown <neilb@suse.de>
Acked-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Kent Overstreet
2012-09-10 14:41:12 -07:00
parent 2f477877f8
commit 9e882242c6
4 changed files with 37 additions and 38 deletions
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19
drivers/md/raid1.c
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@@ -2059,25 +2059,6 @@ static void fix_read_error(struct r1conf *conf, int read_disk,
}
}
static void bi_complete(struct bio *bio, int error)
{
complete((struct completion *)bio->bi_private);
}
static int submit_bio_wait(int rw, struct bio *bio)
{
struct completion event;
rw |= REQ_SYNC;
init_completion(&event);
bio->bi_private = &event;
bio->bi_end_io = bi_complete;
submit_bio(rw, bio);
wait_for_completion(&event);
return test_bit(BIO_UPTODATE, &bio->bi_flags);
}
static int narrow_write_error(struct r1bio *r1_bio, int i)
{
struct mddev *mddev = r1_bio->mddev;