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target: avoid accessing .bi_vcnt directly

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When the bio is full, bio_add_pc_page() will return zero,
so use this information tell when the bio is full.

Also replace access to .bi_vcnt for pr_debug() with bio_segments().

Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Ming Lei <[email protected]>
Reviewed-by: Sagi Grimberg <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Ming Lei 2016-11-11 20:05:32 +08:00 • committed by Jens Axboe
commit 84c8590646
1 changed files with 2 additions and 6 deletions
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8
drivers/target/target_core_pscsi.c
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@ -935,13 +935,9 @@ pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
rc = bio_add_pc_page(pdv->pdv_sd->request_queue,
bio, page, bytes, off);
if (rc != bytes)
goto fail;
pr_debug("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n",
bio->bi_vcnt, nr_vecs);
if (bio->bi_vcnt > nr_vecs) {
bio_segments(bio), nr_vecs);
if (rc != bytes) {
pr_debug("PSCSI: Reached bio->bi_vcnt max:"
" %d i: %d bio: %p, allocating another"
" bio\n", bio->bi_vcnt, i, bio);