diff options
author | Kent Overstreet <koverstreet@google.com> | 2012-09-10 21:41:12 (GMT) |
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committer | Kent Overstreet <koverstreet@google.com> | 2013-03-23 21:15:32 (GMT) |
commit | 9e882242c6193ae6f416f2d8d8db0d9126bd996b (patch) | |
tree | 388e4a9ef2ab3693eaee77a8bffabc62a9b86d7f /fs | |
parent | 2f477877f8c4be18f054aeb7c4be8cc748cfe932 (diff) | |
download | linux-fsl-qoriq-9e882242c6193ae6f416f2d8d8db0d9126bd996b.tar.xz |
block: Add submit_bio_wait(), remove from md
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>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/bio.c | 36 |
1 files changed, 36 insertions, 0 deletions
@@ -752,6 +752,42 @@ int bio_add_page(struct bio *bio, struct page *page, unsigned int len, } EXPORT_SYMBOL(bio_add_page); +struct submit_bio_ret { + struct completion event; + int error; +}; + +static void submit_bio_wait_endio(struct bio *bio, int error) +{ + struct submit_bio_ret *ret = bio->bi_private; + + ret->error = error; + complete(&ret->event); +} + +/** + * submit_bio_wait - submit a bio, and wait until it completes + * @rw: whether to %READ or %WRITE, or maybe to %READA (read ahead) + * @bio: The &struct bio which describes the I/O + * + * Simple wrapper around submit_bio(). Returns 0 on success, or the error from + * bio_endio() on failure. + */ +int submit_bio_wait(int rw, struct bio *bio) +{ + struct submit_bio_ret ret; + + rw |= REQ_SYNC; + init_completion(&ret.event); + bio->bi_private = &ret; + bio->bi_end_io = submit_bio_wait_endio; + submit_bio(rw, bio); + wait_for_completion(&ret.event); + + return ret.error; +} +EXPORT_SYMBOL(submit_bio_wait); + /** * bio_advance - increment/complete a bio by some number of bytes * @bio: bio to advance |