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| author | Christoph Hellwig <hch@lst.de> | 2021-02-24 08:24:05 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-02-24 08:55:00 -0700 |
| commit | b90994c6ab623baf9268df9710692f14920ce9d2 (patch) | |
| tree | 0b660d261f3f35cefad27fa700025fb4ba770a18 /block/bounce.c | |
| parent | 5407334c53e9922c1c3fb28801e489d0b74f2c8d (diff) | |
| download | lwn-b90994c6ab623baf9268df9710692f14920ce9d2.tar.gz lwn-b90994c6ab623baf9268df9710692f14920ce9d2.zip | |
block: fix bounce_clone_bio for passthrough bios
Now that bio_alloc_bioset does not fall back to kmalloc for a NULL
bio_set, handle that case explicitly and simplify the calling
conventions.
Based on an earlier patch from Chaitanya Kulkarni.
Fixes: 3175199ab0ac ("block: split bio_kmalloc from bio_alloc_bioset")
Reported-by: Chaitanya Kulkarni <Chaitanya.Kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bounce.c')
| -rw-r--r-- | block/bounce.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/block/bounce.c b/block/bounce.c index fc55314aa426..79d81221446d 100644 --- a/block/bounce.c +++ b/block/bounce.c @@ -214,8 +214,7 @@ static void bounce_end_io_read_isa(struct bio *bio) __bounce_end_io_read(bio, &isa_page_pool); } -static struct bio *bounce_clone_bio(struct bio *bio_src, gfp_t gfp_mask, - struct bio_set *bs) +static struct bio *bounce_clone_bio(struct bio *bio_src, gfp_t gfp_mask) { struct bvec_iter iter; struct bio_vec bv; @@ -242,8 +241,11 @@ static struct bio *bounce_clone_bio(struct bio *bio_src, gfp_t gfp_mask, * asking for trouble and would force extra work on * __bio_clone_fast() anyways. */ - - bio = bio_alloc_bioset(gfp_mask, bio_segments(bio_src), bs); + if (bio_is_passthrough(bio_src)) + bio = bio_kmalloc(gfp_mask, bio_segments(bio_src)); + else + bio = bio_alloc_bioset(gfp_mask, bio_segments(bio_src), + &bounce_bio_set); if (!bio) return NULL; bio->bi_bdev = bio_src->bi_bdev; @@ -296,7 +298,6 @@ static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig, unsigned i = 0; bool bounce = false; int sectors = 0; - bool passthrough = bio_is_passthrough(*bio_orig); bio_for_each_segment(from, *bio_orig, iter) { if (i++ < BIO_MAX_PAGES) @@ -307,14 +308,14 @@ static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig, if (!bounce) return; - if (!passthrough && sectors < bio_sectors(*bio_orig)) { + if (!bio_is_passthrough(*bio_orig) && + sectors < bio_sectors(*bio_orig)) { bio = bio_split(*bio_orig, sectors, GFP_NOIO, &bounce_bio_split); bio_chain(bio, *bio_orig); submit_bio_noacct(*bio_orig); *bio_orig = bio; } - bio = bounce_clone_bio(*bio_orig, GFP_NOIO, passthrough ? NULL : - &bounce_bio_set); + bio = bounce_clone_bio(*bio_orig, GFP_NOIO); /* * Bvec table can't be updated by bio_for_each_segment_all(), |