e1000: Fix lock up while setting ring parameters

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>

diff --git a/drivers/net/e1000/e1000_ethtool.c b/drivers/net/e1000/e1000_ethtool.c
index 9c77413..f7e81e9 100644 (file)
--- a/drivers/net/e1000/e1000_ethtool.c
+++ b/drivers/net/e1000/e1000_ethtool.c
@@ -634,6 +634,9 @@ e1000_set_ringparam(struct net_device *netdev,
        struct e1000_rx_ring *rxdr, *rx_old, *rx_new;
        int i, err, tx_ring_size, rx_ring_size;
 
+       if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
+               return -EINVAL;
+
        tx_ring_size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
        rx_ring_size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
 
@@ -661,9 +664,6 @@ e1000_set_ringparam(struct net_device *netdev,
        txdr = adapter->tx_ring;
        rxdr = adapter->rx_ring;
 
-       if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
-               return -EINVAL;
-
        rxdr->count = max(ring->rx_pending,(uint32_t)E1000_MIN_RXD);
        rxdr->count = min(rxdr->count,(uint32_t)(mac_type < e1000_82544 ?
                E1000_MAX_RXD : E1000_MAX_82544_RXD));