From 44effc1f99d0375fe5939f99bd65a5b6037f5f1c Mon Sep 17 00:00:00 2001 From: =?utf8?q?C=C3=A9dric=20Le=20Goater?= Date: Fri, 8 Jun 2018 13:15:32 +0100 Subject: [PATCH] ftgmac100: fix multicast hash routine MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Based on the multicast hash calculation of the FTGMAC100 Linux driver. Signed-off-by: Cédric Le Goater Reviewed-by: Philippe Mathieu-Daudé Message-id: 20180530061711.23673-4-clg@kaod.org Signed-off-by: Peter Maydell --- hw/net/ftgmac100.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/hw/net/ftgmac100.c b/hw/net/ftgmac100.c index abf80655f2..8a7f274dc1 100644 --- a/hw/net/ftgmac100.c +++ b/hw/net/ftgmac100.c @@ -776,8 +776,8 @@ static int ftgmac100_filter(FTGMAC100State *s, const uint8_t *buf, size_t len) return 0; } - /* TODO: this does not seem to work for ftgmac100 */ - mcast_idx = net_crc32(buf, ETH_ALEN) >> 26; + mcast_idx = net_crc32_le(buf, ETH_ALEN); + mcast_idx = (~(mcast_idx >> 2)) & 0x3f; if (!(s->math[mcast_idx / 32] & (1 << (mcast_idx % 32)))) { return 0; } -- 2.11.4.GIT