[RFC PATCH 10/16] ib/mad: Add registration check for Intel Omni-Path Architecture MADs

[ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org]

From: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

If the registration specifies an OPA MAD class version and the device does not
support jumbo MADs, fail the MAD registration.

Signed-off-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/core/mad.c | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

diff --git a/drivers/infiniband/core/mad.c b/drivers/infiniband/core/mad.c
index a3ba37f..0ddfbd7 100644
--- a/drivers/infiniband/core/mad.c
+++ b/drivers/infiniband/core/mad.c
@@ -238,6 +238,14 @@ struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
 		goto error1;
 	}
 
+	/* Validate device and port */
+	port_priv = ib_get_mad_port(device, port_num);
+	if (!port_priv) {
+		dev_notice(&device->dev, "ib_register_mad_agent: Invalid port\n");
+		ret = ERR_PTR(-ENODEV);
+		goto error1;
+	}
+
 	/* Validate MAD registration request if supplied */
 	if (mad_reg_req) {
 		if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION) {
@@ -246,6 +254,12 @@ struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
 				   mad_reg_req->mgmt_class_version);
 			goto error1;
 		}
+		if (mad_reg_req->mgmt_class_version >= OPA_MIN_CLASS_VERSION
+		    && !port_priv->qp_info[qpn].supports_jumbo_mads) {
+			dev_notice(&device->dev,
+				   "ib_register_mad_agent: OPA class Version specified on a device which does not support jumbo MAD's\n");
+			goto error1;
+		}
 		if (!recv_handler) {
 			dev_notice(&device->dev,
 				   "ib_register_mad_agent: no recv_handler\n");
@@ -323,14 +337,6 @@ struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
 			goto error1;
 	}
 
-	/* Validate device and port */
-	port_priv = ib_get_mad_port(device, port_num);
-	if (!port_priv) {
-		dev_notice(&device->dev, "ib_register_mad_agent: Invalid port\n");
-		ret = ERR_PTR(-ENODEV);
-		goto error1;
-	}
-
 	/* Verify the QP requested is supported.  For example, Ethernet devices
 	 * will not have QP0 */
 	if (!port_priv->qp_info[qpn].qp) {
-- 
1.8.2

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