ublk: fix error code for unsupported command

ENOTSUPP is for kernel use only, and shouldn't be sent to userspace.

Fix it by replacing it with EOPNOTSUPP.

Cc: [email protected]
Fixes: bfbcef0 ("ublk_drv: move ublk_get_device_from_id into ublk_ctrl_uring_cmd")
Signed-off-by: Ming Lei <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>

Author: Ming Lei

drivers/block/ublk_drv.c

@@ -3041,7 +3041,7 @@ static int ublk_ctrl_uring_cmd(struct io_uring_cmd *cmd,
 		ret = ublk_ctrl_end_recovery(ub, cmd);
 		break;
 	default:
-		ret = -ENOTSUPP;
+		ret = -EOPNOTSUPP;
 		break;
 	}