sky2: used fixed RSS key

Rather than generating a different RSS key on each boot, just use
a predetermined value that will map same flow to same value on
every device.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
index 3777fb348b863477493eda66c4392d03b8285160..48c9e1281c7e95f7ec7f2d50de9b09ffa9d332dc 100644 (file)
--- a/drivers/net/ethernet/marvell/sky2.c
+++ b/drivers/net/ethernet/marvell/sky2.c
@@ -1275,6 +1275,14 @@ static void rx_set_checksum(struct sky2_port *sky2)
                     ? BMU_ENA_RX_CHKSUM : BMU_DIS_RX_CHKSUM);
 }
 
+/*
+ * Fixed initial key as seed to RSS.
+ */
+static const uint32_t rss_init_key[10] = {
+       0x7c3351da, 0x51c5cf4e, 0x44adbdd1, 0xe8d38d18, 0x48897c43,
+       0xb1d60e7e, 0x6a3dd760, 0x01a2e453, 0x16f46f13, 0x1a0e7b30
+};
+
 /* Enable/disable receive hash calculation (RSS) */
 static void rx_set_rss(struct net_device *dev, u32 features)
 {
@@ -1290,12 +1298,9 @@ static void rx_set_rss(struct net_device *dev, u32 features)
 
        /* Program RSS initial values */
        if (features & NETIF_F_RXHASH) {
-               u32 key[nkeys];
-
-               get_random_bytes(key, nkeys * sizeof(u32));
                for (i = 0; i < nkeys; i++)
                        sky2_write32(hw, SK_REG(sky2->port, RSS_KEY + i * 4),
-                                    key[i]);
+                                    rss_init_key[i]);
 
                /* Need to turn on (undocumented) flag to make hashing work  */
                sky2_write32(hw, SK_REG(sky2->port, RX_GMF_CTRL_T),