iw_cxgb*: kzalloc the iwcm verbs struct

So future additions to that struct get initialized by default.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/cxgb4/provider.c

@@ -616,7 +616,7 @@ void c4iw_register_device(struct work_struct *work)
 	dev->ibdev.dev.parent = &dev->rdev.lldi.pdev->dev;
 	dev->ibdev.uverbs_abi_ver = C4IW_UVERBS_ABI_VERSION;
 
-	dev->ibdev.iwcm = kmalloc(sizeof(struct iw_cm_verbs), GFP_KERNEL);
+	dev->ibdev.iwcm = kzalloc(sizeof(struct iw_cm_verbs), GFP_KERNEL);
 	if (!dev->ibdev.iwcm) {
 		ret = -ENOMEM;
 		goto err_dealloc_ctx;