ixgbe: fix memory leak when resizing rings while interface is down

This patch resolves a memory leak that occurs when you resize the rings via
the ethtool -G option while the interface is down.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ixgbe/ixgbe_ethtool.c b/drivers/net/ixgbe/ixgbe_ethtool.c
index fa314cb..856c18c 100644 (file)
--- a/drivers/net/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ixgbe/ixgbe_ethtool.c
@@ -798,7 +798,7 @@ static int ixgbe_set_ringparam(struct net_device *netdev,
 {
        struct ixgbe_adapter *adapter = netdev_priv(netdev);
        struct ixgbe_ring *temp_tx_ring, *temp_rx_ring;
-       int i, err;
+       int i, err = 0;
        u32 new_rx_count, new_tx_count;
        bool need_update = false;
 
@@ -822,6 +822,16 @@ static int ixgbe_set_ringparam(struct net_device *netdev,
        while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
                msleep(1);
 
+       if (!netif_running(adapter->netdev)) {
+               for (i = 0; i < adapter->num_tx_queues; i++)
+                       adapter->tx_ring[i].count = new_tx_count;
+               for (i = 0; i < adapter->num_rx_queues; i++)
+                       adapter->rx_ring[i].count = new_rx_count;
+               adapter->tx_ring_count = new_tx_count;
+               adapter->rx_ring_count = new_rx_count;
+               goto err_setup;
+       }
+
        temp_tx_ring = kcalloc(adapter->num_tx_queues,
                               sizeof(struct ixgbe_ring), GFP_KERNEL);
        if (!temp_tx_ring) {
@@ -879,8 +889,7 @@ static int ixgbe_set_ringparam(struct net_device *netdev,
 
        /* if rings need to be updated, here's the place to do it in one shot */
        if (need_update) {
-               if (netif_running(netdev))
-                       ixgbe_down(adapter);
+               ixgbe_down(adapter);
 
                /* tx */
                if (new_tx_count != adapter->tx_ring_count) {
@@ -897,13 +906,8 @@ static int ixgbe_set_ringparam(struct net_device *netdev,
                        temp_rx_ring = NULL;
                        adapter->rx_ring_count = new_rx_count;
                }
-       }
-
-       /* success! */
-       err = 0;
-       if (netif_running(netdev))
                ixgbe_up(adapter);
-
+       }
 err_setup:
        clear_bit(__IXGBE_RESETTING, &adapter->state);
        return err;