From: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Date: Fri, 15 Dec 2017 18:41:52 +0000 (+0000)
Subject: ftgmac100: use inline net_crc32() and bitshift instead of compute_mcast_idx()
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=4227be63f081e939ae7313b1921d8f60a5d8d714;p=qmiga%2Fqemu.git

ftgmac100: use inline net_crc32() and bitshift instead of compute_mcast_idx()

This makes it much easier to compare the multicast CRC calculation endian and
bitshift against the Linux driver implementation.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Jason Wang <jasowang@redhat.com>
---

diff --git a/hw/net/ftgmac100.c b/hw/net/ftgmac100.c
index 3c36ab9cec..704f452067 100644
--- a/hw/net/ftgmac100.c
+++ b/hw/net/ftgmac100.c
@@ -762,7 +762,7 @@ static int ftgmac100_filter(FTGMAC100State *s, const uint8_t *buf, size_t len)
             }
 
             /* TODO: this does not seem to work for ftgmac100 */
-            mcast_idx = compute_mcast_idx(buf);
+            mcast_idx = net_crc32(buf, ETH_ALEN) >> 26;
             if (!(s->math[mcast_idx / 32] & (1 << (mcast_idx % 32)))) {
                 return 0;
             }