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| author | Ursula Braun <braunu@de.ibm.com> | 2007-10-05 16:45:46 +0200 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-10-10 16:54:41 -0700 |
| commit | d8fae9c2f2642ffe411424ed2e4677f959168152 (patch) | |
| tree | e037acf17ddb344baa3bbb5c1d9cb398a409d8c8 /drivers/s390/net | |
| parent | 6570ebc4f57ad0761104f769576ae5652d9b8d64 (diff) | |
| download | blackbird-op-linux-d8fae9c2f2642ffe411424ed2e4677f959168152.tar.gz blackbird-op-linux-d8fae9c2f2642ffe411424ed2e4677f959168152.zip | |
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.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/s390/net/qeth_main.c b/drivers/s390/net/qeth_main.c index fe6164795eda..6d7b79e2ba92 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); } } } |
