linux-kernel - [PATCH 2/2] selftests: ublk: specify io_cmd

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Message-ID: <20250328194230.2726862-3-csander@purestorage.com>
Date: Fri, 28 Mar 2025 13:42:30 -0600
From: Caleb Sander Mateos <csander@...estorage.com>
To: Ming Lei <ming.lei@...hat.com>,
	Jens Axboe <axboe@...nel.dk>,
	Shuah Khan <shuah@...nel.org>
Cc: linux-block@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	Caleb Sander Mateos <csander@...estorage.com>
Subject: [PATCH 2/2] selftests: ublk: specify io_cmd_buf pointer type

Matching the ublk driver, change the type of io_cmd_buf from char * to
struct ublksrv_io_desc *.

Signed-off-by: Caleb Sander Mateos <csander@...estorage.com>
---
 tools/testing/selftests/ublk/kublk.c | 2 +-
 tools/testing/selftests/ublk/kublk.h | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/ublk/kublk.c b/tools/testing/selftests/ublk/kublk.c
index 05147b53c361..83756f97c26e 100644
--- a/tools/testing/selftests/ublk/kublk.c
+++ b/tools/testing/selftests/ublk/kublk.c
@@ -320,11 +320,11 @@ static int ublk_queue_init(struct ublk_queue *q)
 		q->state |= UBLKSRV_ZC;
 	}
 
 	cmd_buf_size = ublk_queue_cmd_buf_sz(q);
 	off = UBLKSRV_CMD_BUF_OFFSET + q->q_id * ublk_queue_max_cmd_buf_sz();
-	q->io_cmd_buf = (char *)mmap(0, cmd_buf_size, PROT_READ,
+	q->io_cmd_buf = mmap(0, cmd_buf_size, PROT_READ,
 			MAP_SHARED | MAP_POPULATE, dev->fds[0], off);
 	if (q->io_cmd_buf == MAP_FAILED) {
 		ublk_err("ublk dev %d queue %d map io_cmd_buf failed %m\n",
 				q->dev->dev_info.dev_id, q->q_id);
 		goto fail;
diff --git a/tools/testing/selftests/ublk/kublk.h b/tools/testing/selftests/ublk/kublk.h
index f31a5c4d4143..760ff8ffb810 100644
--- a/tools/testing/selftests/ublk/kublk.h
+++ b/tools/testing/selftests/ublk/kublk.h
@@ -126,11 +126,11 @@ struct ublk_queue {
 	int q_depth;
 	unsigned int cmd_inflight;
 	unsigned int io_inflight;
 	struct ublk_dev *dev;
 	const struct ublk_tgt_ops *tgt_ops;
-	char *io_cmd_buf;
+	struct ublksrv_io_desc *io_cmd_buf;
 	struct io_uring ring;
 	struct ublk_io ios[UBLK_QUEUE_DEPTH];
 #define UBLKSRV_QUEUE_STOPPING	(1U << 0)
 #define UBLKSRV_QUEUE_IDLE	(1U << 1)
 #define UBLKSRV_NO_BUF		(1U << 2)
@@ -300,11 +300,11 @@ static inline void ublk_mark_io_done(struct ublk_io *io, int res)
 	io->result = res;
 }
 
 static inline const struct ublksrv_io_desc *ublk_get_iod(const struct ublk_queue *q, int tag)
 {
-	return (struct ublksrv_io_desc *)&(q->io_cmd_buf[tag * sizeof(struct ublksrv_io_desc)]);
+	return &q->io_cmd_buf[tag];
 }
 
 static inline void ublk_set_sqe_cmd_op(struct io_uring_sqe *sqe, __u32 cmd_op)
 {
 	__u32 *addr = (__u32 *)&sqe->off;
-- 
2.45.2