From 00427a7387a1c91ddb6b69e50916173d8aca66e0 Mon Sep 17 00:00:00 2001 From: stephen hemminger Date: Wed, 16 Nov 2011 13:42:59 +0000 Subject: [PATCH] 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 Signed-off-by: David S. Miller --- drivers/net/ethernet/marvell/sky2.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c index 3777fb348b8..48c9e1281c7 100644 --- 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), -- 2.20.1