ublk: remove check IO_URING_F_SQE128 in ublk_ch_uring_cmd

commit 9c7c4bc986932218fd0df9d2a100509772028fb1 upstream.

sizeof(struct ublksrv_io_cmd) is 16bytes, which can be held in 64byte SQE,
so not necessary to check IO_URING_F_SQE128.

With this change, we get chance to save half SQ ring memory.

Fixed: 71f28f3136af ("ublk_drv: add io_uring based userspace block driver")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20230220041413.1524335-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c
index 4459cfbdbcb18aac9458dcc184a02d31e55bf4a9..c2f0f74193f0ec01999a44875392f0a7281bc5ee 100644 (file)
--- a/drivers/block/ublk_drv.c
+++ b/drivers/block/ublk_drv.c
@@ -1223,9 +1223,6 @@ static int __ublk_ch_uring_cmd(struct io_uring_cmd *cmd,
                        __func__, cmd->cmd_op, ub_cmd->q_id, tag,
                        ub_cmd->result);
 
-       if (!(issue_flags & IO_URING_F_SQE128))
-               goto out;
-
        if (ub_cmd->q_id >= ub->dev_info.nr_hw_queues)
                goto out;