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[Qemu-devel] [PULL 12/18] ftgmac100: use inline net_crc32() and bitshift


From: Jason Wang
Subject: [Qemu-devel] [PULL 12/18] ftgmac100: use inline net_crc32() and bitshift instead of compute_mcast_idx()
Date: Fri, 22 Dec 2017 10:15:31 +0800

From: Mark Cave-Ayland <address@hidden>

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 <address@hidden>
Signed-off-by: Jason Wang <address@hidden>
---
 hw/net/ftgmac100.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/net/ftgmac100.c b/hw/net/ftgmac100.c
index 3c36ab9..704f452 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;
             }
-- 
2.7.4




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