ublk: don't pass ublk_queue to ublk_fetch()

ublk_fetch() only uses the ublk_queue to get the ublk_device, which its
caller already has. So just pass the ublk_device directly.

Signed-off-by: Caleb Sander Mateos <csander@purestorage.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Author: calebsander

drivers/block/ublk_drv.c

@@ -2206,10 +2206,9 @@ static int ublk_check_fetch_buf(const struct ublk_device *ub, __u64 buf_addr)
 	return 0;
 }
 
-static int ublk_fetch(struct io_uring_cmd *cmd, struct ublk_queue *ubq,
+static int ublk_fetch(struct io_uring_cmd *cmd, struct ublk_device *ub,
 		      struct ublk_io *io, __u64 buf_addr)
 {
-	struct ublk_device *ub = ubq->dev;
 	int ret = 0;
 
 	/*
@@ -2343,7 +2342,7 @@ static int ublk_ch_uring_cmd_local(struct io_uring_cmd *cmd,
 		ret = ublk_check_fetch_buf(ub, addr);
 		if (ret)
 			goto out;
-		ret = ublk_fetch(cmd, ubq, io, addr);
+		ret = ublk_fetch(cmd, ub, io, addr);
 		if (ret)
 			goto out;