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author | Heiner Litz <hlitz@ucsc.edu> | 2019-06-21 11:11:59 +0200 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-26 09:10:31 +0200 |
commit | c8a410cd3cfba1aabae6bfd4a38d395c4ebd9df6 (patch) | |
tree | 1ba17b45b999587b3a9c9402a4ebf98b311c78cc /drivers/lightnvm/pblk-core.c | |
parent | ad99783841ff35c728c745e645c309a95959a09f (diff) | |
download | linux-stable-c8a410cd3cfba1aabae6bfd4a38d395c4ebd9df6.tar.gz linux-stable-c8a410cd3cfba1aabae6bfd4a38d395c4ebd9df6.tar.bz2 linux-stable-c8a410cd3cfba1aabae6bfd4a38d395c4ebd9df6.zip |
lightnvm: pblk: fix freeing of merged pages
[ Upstream commit 510fd8ea98fcb586c01aef93d87c060a159ac30a ]
bio_add_pc_page() may merge pages when a bio is padded due to a flush.
Fix iteration over the bio to free the correct pages in case of a merge.
Signed-off-by: Heiner Litz <hlitz@ucsc.edu>
Reviewed-by: Javier González <javier@javigon.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/lightnvm/pblk-core.c')
-rw-r--r-- | drivers/lightnvm/pblk-core.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c index 773537804319..f546e6f28b8a 100644 --- a/drivers/lightnvm/pblk-core.c +++ b/drivers/lightnvm/pblk-core.c @@ -323,14 +323,16 @@ void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int type) void pblk_bio_free_pages(struct pblk *pblk, struct bio *bio, int off, int nr_pages) { - struct bio_vec bv; - int i; - - WARN_ON(off + nr_pages != bio->bi_vcnt); - - for (i = off; i < nr_pages + off; i++) { - bv = bio->bi_io_vec[i]; - mempool_free(bv.bv_page, &pblk->page_bio_pool); + struct bio_vec *bv; + struct page *page; + int i, e, nbv = 0; + + for (i = 0; i < bio->bi_vcnt; i++) { + bv = &bio->bi_io_vec[i]; + page = bv->bv_page; + for (e = 0; e < bv->bv_len; e += PBLK_EXPOSED_PAGE_SIZE, nbv++) + if (nbv >= off) + mempool_free(page++, &pblk->page_bio_pool); } } |