From: Cédric Le Goater <c...@kaod.org>
Based on the multicast hash calculation of the FTGMAC100 Linux driver.
Signed-off-by: Cédric Le Goater <c...@kaod.org>
Reviewed-by: Philippe Mathieu-Daudé <f4...@amsat.org>
Message-id: 20180530061711.23673-4-...@kaod.org
Signed-off-by: Peter Maydell <peter.mayd...@linaro.org>
---
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 abf80655f28..8a7f274dc11 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;
}
--
2.17.1
