ibmvnic: Unmap longer term buffer before free

Make sure we unregister long term buffers from the adapter
prior to DMA unmapping it and freeing the buffer. Failure
to do so could result in a DMA to a now invalid address.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 625896de25f73c9c314f50bdcad50cd82b97fd78..c10bae7823e05498d913bd473eea93537253f6f6 100644 (file)
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -193,9 +193,9 @@ static void free_long_term_buff(struct ibmvnic_adapter *adapter,
        if (!ltb->buff)
                return;
 
-       dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
        if (!adapter->failover)
                send_request_unmap(adapter, ltb->map_id);
+       dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 }
 
 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,