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Message-ID: <20070620105802.GC9454@de.ibm.com> Date: Wed, 20 Jun 2007 12:58:02 +0200 From: Frank Pavlic <fpavlic@...ibm.com> To: jgarzik@...ox.com Cc: netdev@...r.kernel.org Subject: [PATCH 3/8] s390: avoid inconsistent lock state in qeth From: Ursula Braun <braunu@...ibm.com> ipv6_regen_rndid in net/ipv6/addrconf.c makes use of "write_lock_bh" for its inet6_dev->lock. It may run in softirq-context. qeth makes use of "read_lock" for the same inet6_dev->lock. To avoid a potential deadlock situation, qeth should make use of "read_lock_bh" for its usages of inet6_dev->lock. Signed-off-by: Ursula Braun <braunu@...ibm.com> Signed-off-by: Frank Pavlic <fpavlic@...ibm.com> --- drivers/s390/net/qeth_main.c | 8 ++++---- 1 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/s390/net/qeth_main.c b/drivers/s390/net/qeth_main.c index c5a9507..79b7379 100644 --- a/drivers/s390/net/qeth_main.c +++ b/drivers/s390/net/qeth_main.c @@ -5850,9 +5850,9 @@ qeth_add_vlan_mc6(struct qeth_card *card) in_dev = in6_dev_get(netdev); if (!in_dev) continue; - read_lock(&in_dev->lock); + read_lock_bh(&in_dev->lock); qeth_add_mc6(card,in_dev); - read_unlock(&in_dev->lock); + read_unlock_bh(&in_dev->lock); in6_dev_put(in_dev); } #endif /* CONFIG_QETH_VLAN */ @@ -5869,10 +5869,10 @@ qeth_add_multicast_ipv6(struct qeth_card *card) in6_dev = in6_dev_get(card->dev); if (in6_dev == NULL) return; - read_lock(&in6_dev->lock); + read_lock_bh(&in6_dev->lock); qeth_add_mc6(card, in6_dev); qeth_add_vlan_mc6(card); - read_unlock(&in6_dev->lock); + read_unlock_bh(&in6_dev->lock); in6_dev_put(in6_dev); } #endif /* CONFIG_QETH_IPV6 */ -- 1.5.2.1 - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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