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[PULL,12/18] ftgmac100: use inline net_crc32() and bitshift instead of compute_mcast_idx()

Message ID 1513908937-16034-13-git-send-email-jasowang@redhat.com
State New
Headers show
Series [PULL,01/18] e1000, e1000e: Move per-packet TX offload flags out of context state | expand

Commit Message

Jason Wang Dec. 22, 2017, 2:15 a.m. UTC 
From: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

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>
---
 hw/net/ftgmac100.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

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;
             }