The raid5-ppl submission code uses bio_add_page() to add a page to a
newly created bio. bio_add_page() can fail, but the return value is never
checked. For adding consecutive pages, the return is actually checked and
a new bio is allocated if adding the page fails.
Use __bio_add_page() as adding a single page to a newly created bio is
guaranteed to succeed.
This brings us a step closer to marking bio_add_page() as __must_check.
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Damien Le Moal <damien.lemoal@xxxxxxxxxxxxxxxxxx>
Acked-by: Song Liu <song@xxxxxxxxxx>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
---
drivers/md/raid5-ppl.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/md/raid5-ppl.c b/drivers/md/raid5-ppl.c
index e495939bb3e0..eaea57aee602 100644
--- a/drivers/md/raid5-ppl.c
+++ b/drivers/md/raid5-ppl.c
@@ -465,7 +465,7 @@ static void ppl_submit_iounit(struct ppl_io_unit *io)
bio->bi_end_io = ppl_log_endio;
bio->bi_iter.bi_sector = log->next_io_sector;
- bio_add_page(bio, io->header_page, PAGE_SIZE, 0);
+ __bio_add_page(bio, io->header_page, PAGE_SIZE, 0);
pr_debug("%s: log->current_io_sector: %llu\n", __func__,
(unsigned long long)log->next_io_sector);
@@ -496,7 +496,7 @@ static void ppl_submit_iounit(struct ppl_io_unit *io)
prev->bi_opf, GFP_NOIO,
&ppl_conf->bs);
bio->bi_iter.bi_sector = bio_end_sector(prev);
- bio_add_page(bio, sh->ppl_page, PAGE_SIZE, 0);
+ __bio_add_page(bio, sh->ppl_page, PAGE_SIZE, 0);
bio_chain(bio, prev);
ppl_submit_iounit_bio(io, prev);
--
2.40.1
--
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