[PATCH v10 2/3] ublk: move check for empty address field on command submission

["Andreas Hindborg (Samsung)" <nmi@metaspace.dk>]

From: Andreas Hindborg <a.hindborg@samsung.com>

In preparation for zoned storage support, move the check for empty `addr`
field into the command handler case statement. Note that the check makes no
sense for `UBLK_IO_NEED_GET_DATA` because the `addr` field must always be
set for this command.

Signed-off-by: Andreas Hindborg <a.hindborg@samsung.com>
---
 drivers/block/ublk_drv.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c
index db3523e281a6..5a1ee17636ac 100644
--- a/drivers/block/ublk_drv.c
+++ b/drivers/block/ublk_drv.c
@@ -1419,11 +1419,6 @@ static int __ublk_ch_uring_cmd(struct io_uring_cmd *cmd,
 			^ (_IOC_NR(cmd_op) == UBLK_IO_NEED_GET_DATA))
 		goto out;
 
-	if (ublk_support_user_copy(ubq) && ub_cmd->addr) {
-		ret = -EINVAL;
-		goto out;
-	}
-
 	ret = ublk_check_cmd_op(cmd_op);
 	if (ret)
 		goto out;
@@ -1452,6 +1447,12 @@ static int __ublk_ch_uring_cmd(struct io_uring_cmd *cmd,
 				goto out;
 		}
 
+		/* User copy requires addr to be unset */
+		if (ublk_support_user_copy(ubq) && ub_cmd->addr) {
+			ret = -EINVAL;
+			goto out;
+		}
+
 		ublk_fill_io_cmd(io, cmd, ub_cmd->addr);
 		ublk_mark_io_ready(ub, ubq);
 		break;
@@ -1470,6 +1471,13 @@ static int __ublk_ch_uring_cmd(struct io_uring_cmd *cmd,
 						req_op(req) == REQ_OP_READ))
 				goto out;
 		}
+
+		/* User copy requires addr to be unset */
+		if (ublk_support_user_copy(ubq) && ub_cmd->addr) {
+			ret = -EINVAL;
+			goto out;
+		}
+
 		ublk_fill_io_cmd(io, cmd, ub_cmd->addr);
 		ublk_commit_completion(ub, ub_cmd);
 		break;
-- 
2.41.0