diff options
author | rwatson <rwatson@FreeBSD.org> | 2005-08-03 00:18:35 +0000 |
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committer | rwatson <rwatson@FreeBSD.org> | 2005-08-03 00:18:35 +0000 |
commit | 9918d13b80941400bfab87834b1e2f1eea58c7c7 (patch) | |
tree | 9a4e586ffbcd1450917ee5e388a4e1eb38254e32 /sys/dev/my | |
parent | efa13b9da9fc80838e2c73140ae27393b3660da4 (diff) | |
download | FreeBSD-src-9918d13b80941400bfab87834b1e2f1eea58c7c7.zip FreeBSD-src-9918d13b80941400bfab87834b1e2f1eea58c7c7.tar.gz |
Modify device drivers supporting multicast addresses to lock if_addr_mtx
over iteration of their multicast address lists when synchronizing the
hardware address filter with the network stack-maintained list.
Problem reported by: Ed Maste (emaste at phaedrus dot sandvine dot ca>
MFC after: 1 week
Diffstat (limited to 'sys/dev/my')
-rw-r--r-- | sys/dev/my/if_my.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/dev/my/if_my.c b/sys/dev/my/if_my.c index d1a4f4c..1741ab7 100644 --- a/sys/dev/my/if_my.c +++ b/sys/dev/my/if_my.c @@ -346,6 +346,7 @@ my_setmulti(struct my_softc * sc) CSR_WRITE_4(sc, MY_MAR1, 0); /* now program new ones */ + IF_ADDR_LOCK(ifp); TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { if (ifma->ifma_addr->sa_family != AF_LINK) continue; @@ -357,6 +358,7 @@ my_setmulti(struct my_softc * sc) hashes[1] |= (1 << (h - 32)); mcnt++; } + IF_ADDR_UNLOCK(ifp); if (mcnt) rxfilt |= MY_AM; |