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authorUrsula Braun <braunu@de.ibm.com>2007-10-05 16:45:46 +0200
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 16:54:41 -0700
commitd8fae9c2f2642ffe411424ed2e4677f959168152 (patch)
treee037acf17ddb344baa3bbb5c1d9cb398a409d8c8 /drivers/s390/net
parent6570ebc4f57ad0761104f769576ae5652d9b8d64 (diff)
downloadop-kernel-dev-d8fae9c2f2642ffe411424ed2e4677f959168152.zip
op-kernel-dev-d8fae9c2f2642ffe411424ed2e4677f959168152.tar.gz
qeth: avoid duplicate deletion of multicast addresses
if qeth_set_multicast_list() is performed on 2 CPUs in parallel, card->ip_list may end corrupted. Solution: In function __qeth_delete_all_mc() remove card->ip_list entry before invoking qeth_deregister_addr_entry(). Thus a 2nd invocation of qeth_set_multicast_list() cannot try to remove the same entry twice. Signed-off-by Ursula Braun <braunu@de.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/s390/net')
-rw-r--r--drivers/s390/net/qeth_main.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/s390/net/qeth_main.c b/drivers/s390/net/qeth_main.c
index fe61647..6d7b79e 100644
--- a/drivers/s390/net/qeth_main.c
+++ b/drivers/s390/net/qeth_main.c
@@ -823,14 +823,15 @@ __qeth_delete_all_mc(struct qeth_card *card, unsigned long *flags)
again:
list_for_each_entry_safe(addr, tmp, &card->ip_list, entry) {
if (addr->is_multicast) {
+ list_del(&addr->entry);
spin_unlock_irqrestore(&card->ip_lock, *flags);
rc = qeth_deregister_addr_entry(card, addr);
spin_lock_irqsave(&card->ip_lock, *flags);
if (!rc) {
- list_del(&addr->entry);
kfree(addr);
goto again;
- }
+ } else
+ list_add(&addr->entry, &card->ip_list);
}
}
}
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