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authorMatthew Wilcox (Oracle) <willy@infradead.org>2021-01-29 07:38:57 +0300
committerJens Axboe <axboe@kernel.dk>2021-02-27 01:49:51 +0300
commit5f7136db82996089cdfb2939c7664b29e9da141d (patch)
treef6fb9ac2dafb2ca03002f6c86bc0fb1062fadcfa /drivers/target
parent94d4bffdda21baa2c749bc229c41811a7559dd15 (diff)
downloadlinux-5f7136db82996089cdfb2939c7664b29e9da141d.tar.xz
block: Add bio_max_segs
It's often inconvenient to use BIO_MAX_PAGES due to min() requiring the sign to be the same. Introduce bio_max_segs() and change BIO_MAX_PAGES to be unsigned to make it easier for the users. Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/target')
-rw-r--r--drivers/target/target_core_iblock.c9
-rw-r--r--drivers/target/target_core_pscsi.c2
2 files changed, 4 insertions, 7 deletions
diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index 8ed93fd205c7..ee3d52061281 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -315,10 +315,8 @@ iblock_get_bio(struct se_cmd *cmd, sector_t lba, u32 sg_num, int op,
* Only allocate as many vector entries as the bio code allows us to,
* we'll loop later on until we have handled the whole request.
*/
- if (sg_num > BIO_MAX_PAGES)
- sg_num = BIO_MAX_PAGES;
-
- bio = bio_alloc_bioset(GFP_NOIO, sg_num, &ib_dev->ibd_bio_set);
+ bio = bio_alloc_bioset(GFP_NOIO, bio_max_segs(sg_num),
+ &ib_dev->ibd_bio_set);
if (!bio) {
pr_err("Unable to allocate memory for bio\n");
return NULL;
@@ -638,8 +636,7 @@ iblock_alloc_bip(struct se_cmd *cmd, struct bio *bio,
return -ENODEV;
}
- bip = bio_integrity_alloc(bio, GFP_NOIO,
- min_t(unsigned int, cmd->t_prot_nents, BIO_MAX_PAGES));
+ bip = bio_integrity_alloc(bio, GFP_NOIO, bio_max_segs(cmd->t_prot_nents));
if (IS_ERR(bip)) {
pr_err("Unable to allocate bio_integrity_payload\n");
return PTR_ERR(bip);
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index 33770e5808ce..3cbc074992bc 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -881,7 +881,7 @@ pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
if (!bio) {
new_bio:
- nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages);
+ nr_vecs = bio_max_segs(nr_pages);
nr_pages -= nr_vecs;
/*
* Calls bio_kmalloc() and sets bio->bi_end_io()