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From:   Christoph Hellwig <hch@lst.de>
To:     Jens Axboe <axboe@kernel.dk>
Cc:     Coly Li <colyli@suse.de>, Mike Snitzer <snitzer@redhat.com>,
        Song Liu <song@kernel.org>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
        Josef Bacik <josef@toxicpanda.com>,
        David Sterba <dsterba@suse.com>,
        Phillip Lougher <phillip@squashfs.org.uk>,
        linux-block@vger.kernel.org, dm-devel@redhat.com,
        linux-kernel@vger.kernel.org, linux-bcache@vger.kernel.org,
        linux-raid@vger.kernel.org, target-devel@vger.kernel.org,
        linux-btrfs@vger.kernel.org
Subject: [PATCH 3/5] target/pscsi: remove pscsi_get_bio
Date:   Wed,  6 Apr 2022 08:12:26 +0200
Message-Id: <20220406061228.410163-4-hch@lst.de>
In-Reply-To: <20220406061228.410163-1-hch@lst.de>
References: <20220406061228.410163-1-hch@lst.de>
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Remove pscsi_get_bio and simplify the code flow in the only caller.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/target/target_core_pscsi.c | 28 ++--------------------------
 1 file changed, 2 insertions(+), 26 deletions(-)

diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index ff292b75e23f9..77bd3af4b2bf8 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -821,23 +821,6 @@ static void pscsi_bi_endio(struct bio *bio)
 	bio_put(bio);
 }
 
-static inline struct bio *pscsi_get_bio(int nr_vecs)
-{
-	struct bio *bio;
-	/*
-	 * Use bio_malloc() following the comment in for bio -> struct request
-	 * in block/blk-core.c:blk_make_request()
-	 */
-	bio = bio_kmalloc(GFP_KERNEL, nr_vecs);
-	if (!bio) {
-		pr_err("PSCSI: bio_kmalloc() failed\n");
-		return NULL;
-	}
-	bio->bi_end_io = pscsi_bi_endio;
-
-	return bio;
-}
-
 static sense_reason_t
 pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
 		struct request *req)
@@ -878,12 +861,10 @@ pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
 			if (!bio) {
 new_bio:
 				nr_vecs = bio_max_segs(nr_pages);
-				/*
-				 * Calls bio_kmalloc() and sets bio->bi_end_io()
-				 */
-				bio = pscsi_get_bio(nr_vecs);
+				bio = bio_kmalloc(GFP_KERNEL, nr_vecs);
 				if (!bio)
 					goto fail;
+				bio->bi_end_io = pscsi_bi_endio;
 
 				if (rw)
 					bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
@@ -912,11 +893,6 @@ pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
 					goto fail;
 				}
 
-				/*
-				 * Clear the pointer so that another bio will
-				 * be allocated with pscsi_get_bio() above.
-				 */
-				bio = NULL;
 				goto new_bio;
 			}
 
-- 
2.30.2