RDMA/cxgb3: iwch_query_port() - handle null inetdev ptr.

in_dev_get() can return NULL. If it does, iwch_query_port() will crash. Handle the NULL case by mapping it to rdma state INIT.

---

 drivers/infiniband/hw/cxgb3/iwch_provider.c |   11 +++++++----
 1 files changed, 7 insertions(+), 4 deletions(-)

index 6895523..03cfaec 100644
@@ -1199,11 +1199,14 @@ static int iwch_query_port(struct ib_device *ibdev,
 		props->state = IB_PORT_DOWN;
 	else {
 		inetdev = in_dev_get(netdev);
-		if (inetdev->ifa_list)
-			props->state = IB_PORT_ACTIVE;
-		else
+		if (inetdev) {
+			if (inetdev->ifa_list)
+				props->state = IB_PORT_ACTIVE;
+			else
+				props->state = IB_PORT_INIT;
+			in_dev_put(inetdev);
+		} else
 			props->state = IB_PORT_INIT;
-		in_dev_put(inetdev);
 	}
 
 	props->port_cap_flags =

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thanks, applied
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