igb: use netdev_rss_key_fill() helper

Use of well known RSS key increases attack surface.
Switch to a random one, using generic helper so that all
ports share a common key.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 1e35fae7a62b9c477050e9988334ef63d0a8c86b..b0e12e7c4a3d2e8df473caa218518af19c8c1fbc 100644 (file)
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -3372,14 +3372,11 @@ static void igb_setup_mrqc(struct igb_adapter *adapter)
        struct e1000_hw *hw = &adapter->hw;
        u32 mrqc, rxcsum;
        u32 j, num_rx_queues;
-       static const u32 rsskey[10] = { 0xDA565A6D, 0xC20E5B25, 0x3D256741,
-                                       0xB08FA343, 0xCB2BCAD0, 0xB4307BAE,
-                                       0xA32DCB77, 0x0CF23080, 0x3BB7426A,
-                                       0xFA01ACBE };
+       u32 rss_key[10];
 
-       /* Fill out hash function seeds */
+       netdev_rss_key_fill(rss_key, sizeof(rss_key));
        for (j = 0; j < 10; j++)
-               wr32(E1000_RSSRK(j), rsskey[j]);
+               wr32(E1000_RSSRK(j), rss_key[j]);
 
        num_rx_queues = adapter->rss_queues;