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block: handle bio_split_to_limits() NULL return

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This can't happen right now, but in preparation for allowing
bio_split_to_limits() returning NULL if it ended the bio, check for it
in all the callers.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe
2023-01-04 08:51:19 -07:00
parent 1551ed5a17
commit 613b14884b
8 changed files with 19 additions and 2 deletions
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4
block/blk-merge.c
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@@ -358,11 +358,13 @@ struct bio *__bio_split_to_limits(struct bio *bio,
default:
split = bio_split_rw(bio, lim, nr_segs, bs,
get_max_io_size(bio, lim) << SECTOR_SHIFT);
if (IS_ERR(split))
return NULL;
break;
}
if (split) {
/* there isn't chance to merge the splitted bio */
/* there isn't chance to merge the split bio */
split->bi_opf |= REQ_NOMERGE;
blkcg_bio_issue_init(split);