IB/core: Pass hardware specific data in query_device

Vendors should be able to pass vendor specific data to/from
user-space via query_device uverb. In order to do this,
we need to pass the vendors' specific udata.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/cxgb3/iwch_provider.c

@@ -1150,13 +1150,17 @@ static u64 fw_vers_string_to_u64(struct iwch_dev *iwch_dev)
 	       (fw_mic & 0xffff);
 }
 
-static int iwch_query_device(struct ib_device *ibdev,
-			     struct ib_device_attr *props)
+static int iwch_query_device(struct ib_device *ibdev, struct ib_device_attr *props,
+			     struct ib_udata *uhw)
 {
 
 	struct iwch_dev *dev;
+
 	PDBG("%s ibdev %p\n", __func__, ibdev);
 
+	if (uhw->inlen || uhw->outlen)
+		return -EINVAL;
+
 	dev = to_iwch_dev(ibdev);
 	memset(props, 0, sizeof *props);
 	memcpy(&props->sys_image_guid, dev->rdev.t3cdev_p->lldev->dev_addr, 6);