ublk: cleanup io cmd code path by adding ublk_fill_io_cmd()

Add one small helper to cleanup io command hanlding code path.
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20230519065030.351216-3-ming.lei@redhat.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

drivers/block/ublk_drv.c

@@ -1256,6 +1256,14 @@ static inline int ublk_check_cmd_op(u32 cmd_op)
 	return 0;
 }
 
+static inline void ublk_fill_io_cmd(struct ublk_io *io,
+		struct io_uring_cmd *cmd, unsigned long buf_addr)
+{
+	io->cmd = cmd;
+	io->flags |= UBLK_IO_FLAG_ACTIVE;
+	io->addr = buf_addr;
+}
+
 static int __ublk_ch_uring_cmd(struct io_uring_cmd *cmd,
 			       unsigned int issue_flags,
 			       const struct ublksrv_io_cmd *ub_cmd)
@@ -1322,10 +1330,8 @@ static int __ublk_ch_uring_cmd(struct io_uring_cmd *cmd,
 		/* FETCH_RQ has to provide IO buffer if NEED GET DATA is not enabled */
 		if (!ub_cmd->addr && !ublk_need_get_data(ubq))
 			goto out;
-		io->cmd = cmd;
-		io->flags |= UBLK_IO_FLAG_ACTIVE;
-		io->addr = ub_cmd->addr;
 
+		ublk_fill_io_cmd(io, cmd, ub_cmd->addr);
 		ublk_mark_io_ready(ub, ubq);
 		break;
 	case UBLK_IO_COMMIT_AND_FETCH_REQ:
@@ -1338,17 +1344,13 @@ static int __ublk_ch_uring_cmd(struct io_uring_cmd *cmd,
 			goto out;
 		if (!(io->flags & UBLK_IO_FLAG_OWNED_BY_SRV))
 			goto out;
-		io->addr = ub_cmd->addr;
-		io->flags |= UBLK_IO_FLAG_ACTIVE;
-		io->cmd = cmd;
+		ublk_fill_io_cmd(io, cmd, ub_cmd->addr);
 		ublk_commit_completion(ub, ub_cmd);
 		break;
 	case UBLK_IO_NEED_GET_DATA:
 		if (!(io->flags & UBLK_IO_FLAG_OWNED_BY_SRV))
 			goto out;
-		io->addr = ub_cmd->addr;
-		io->cmd = cmd;
-		io->flags |= UBLK_IO_FLAG_ACTIVE;
+		ublk_fill_io_cmd(io, cmd, ub_cmd->addr);
 		ublk_handle_need_get_data(ub, ub_cmd->q_id, ub_cmd->tag);
 		break;
 	default: