[PATCH][5/6] IB: Fix user MAD registrations with class 0

[Roland Dreier <roland@topspin.com>]

Fix handling of MAD agent registrations with mgmt_class == 0.  In this
case ib_umad should pass a NULL registration request to the MAD core
rather than a request with mgmt_class set to 0.

Signed-off-by: Roland Dreier <roland@topspin.com>


--- linux-export.orig/drivers/infiniband/core/user_mad.c	2005-03-31 19:06:42.000000000 -0800
+++ linux-export/drivers/infiniband/core/user_mad.c	2005-04-01 10:09:01.250588043 -0800
@@ -389,15 +389,17 @@
 	goto out;
 
 found:
-	req.mgmt_class         = ureq.mgmt_class;
-	req.mgmt_class_version = ureq.mgmt_class_version;
-	memcpy(req.method_mask, ureq.method_mask, sizeof req.method_mask);
-	memcpy(req.oui,         ureq.oui,         sizeof req.oui);
+	if (ureq.mgmt_class) {
+		req.mgmt_class         = ureq.mgmt_class;
+		req.mgmt_class_version = ureq.mgmt_class_version;
+		memcpy(req.method_mask, ureq.method_mask, sizeof req.method_mask);
+		memcpy(req.oui,         ureq.oui,         sizeof req.oui);
+	}
 
 	agent = ib_register_mad_agent(file->port->ib_dev, file->port->port_num,
 				      ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI,
-				      &req, 0, send_handler, recv_handler,
-				      file);
+				      ureq.mgmt_class ? &req : NULL,
+				      0, send_handler, recv_handler, file);
 	if (IS_ERR(agent)) {
 		ret = PTR_ERR(agent);
 		goto out;