RDMA/siw: Fix reporting vendor_part_id

Move the initialization of the vendor_part_id to be before calling
ib_register_device(), this is needed because the query_device() callback
is called from the context of ib_register_device() before initializing the
vendor_part_id, so the reported value is wrong.

Fixes: bdcf26bf ("rdma/siw: network and RDMA core interface")
Link: https://lore.kernel.org/r/20200707130931.444724-1-kamalheib1@gmail.comSigned-off-by: Kamal Heib <kamalheib1@gmail.com>
Reviewed-by: Bernard Metzler <bmt@zurich.ibm.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/sw/siw/siw_main.c

@@ -67,12 +67,13 @@ static int siw_device_register(struct siw_device *sdev, const char *name)
 	static int dev_id = 1;
 	int rv;
 
+	sdev->vendor_part_id = dev_id++;
+
 	rv = ib_register_device(base_dev, name);
 	if (rv) {
 		pr_warn("siw: device registration error %d\n", rv);
 		return rv;
 	}
-	sdev->vendor_part_id = dev_id++;
 
 	siw_dbg(base_dev, "HWaddr=%pM\n", sdev->netdev->dev_addr);