1 files changed, 26 insertions, 6 deletions

diff --git a/drivers/net/ibmveth.c b/drivers/net/ibmveth.c
index 767203d35bc2..df3a59efa7a8 100644
--- a/drivers/net/ibmveth.c
+++ b/drivers/net/ibmveth.c
@@ -437,6 +437,31 @@ static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
                                                  &adapter->rx_buff_pool[i]);
 }
 
+static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter,
+        union ibmveth_buf_desc rxq_desc, u64 mac_address)
+{
+        int rc, try_again = 1;
+
+        /* After a kexec the adapter will still be open, so our attempt to
+        * open it will fail. So if we get a failure we free the adapter and
+        * try again, but only once. */
+retry:
+        rc = h_register_logical_lan(adapter->vdev->unit_address,
+                                    adapter->buffer_list_dma, rxq_desc.desc,
+                                    adapter->filter_list_dma, mac_address);
+
+        if (rc != H_SUCCESS && try_again) {
+                do {
+                        rc = h_free_logical_lan(adapter->vdev->unit_address);
+                } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
+
+                try_again = 0;
+                goto retry;
+        }
+
+        return rc;
+}
+
 static int ibmveth_open(struct net_device *netdev)
 {
         struct ibmveth_adapter *adapter = netdev->priv;
@@ -502,12 +527,7 @@ static int ibmveth_open(struct net_device *netdev)
         ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
         ibmveth_debug_printk("receive q   @ 0x%p\n", adapter->rx_queue.queue_addr);
 
-
-        lpar_rc = h_register_logical_lan(adapter->vdev->unit_address,
-                                         adapter->buffer_list_dma,
-                                         rxq_desc.desc,
-                                         adapter->filter_list_dma,
-                                         mac_address);
+        lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
 
         if(lpar_rc != H_SUCCESS) {
                 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);