svn commit: r262929 - head/sys/dev/ffec

Hiroki Sato hrs at FreeBSD.org
Sat Mar 8 14:58:40 UTC 2014


Author: hrs
Date: Sat Mar  8 14:58:39 2014
New Revision: 262929
URL: http://svnweb.freebsd.org/changeset/base/262929

Log:
  Fix another bug in multicast filtering.  i.MX uses 6 bits from MSB in
  LE CRC32 for the hash value, not the lowest 6 bits in BE CRC32.
  
  Tested by:	Takanori Sawada
  PR:		arm/187179

Modified:
  head/sys/dev/ffec/if_ffec.c

Modified: head/sys/dev/ffec/if_ffec.c
==============================================================================
--- head/sys/dev/ffec/if_ffec.c	Sat Mar  8 12:26:17 2014	(r262928)
+++ head/sys/dev/ffec/if_ffec.c	Sat Mar  8 14:58:39 2014	(r262929)
@@ -959,9 +959,10 @@ ffec_setup_rxfilter(struct ffec_softc *s
 		TAILQ_FOREACH(ifma, &sc->ifp->if_multiaddrs, ifma_link) {
 			if (ifma->ifma_addr->sa_family != AF_LINK)
 				continue;
-			crc = ether_crc32_be(LLADDR((struct sockaddr_dl *)
+			/* 6 bits from MSB in LE CRC32 are used for hash. */
+			crc = ether_crc32_le(LLADDR((struct sockaddr_dl *)
 			    ifma->ifma_addr), ETHER_ADDR_LEN);
-			ghash |= 1LLU << (crc & 0x3f);
+			ghash |= 1LLU << (((uint8_t *)&crc)[3] >> 2);
 		}
 		if_maddr_runlock(ifp);
 	}


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