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authorJulian Wiedmann <jwi@linux.vnet.ibm.com>2017-12-13 18:56:31 +0100
committerDavid S. Miller <davem@davemloft.net>2017-12-15 11:29:43 -0500
commit8a03a3692b100d84785ee7a834e9215e304c9e00 (patch)
treea1026b3b5fb6ea304a12d75c946c7db34e1551fd /drivers/s390/net
parentb22d73d6689fd902a66c08ebe71ab2f3b351e22f (diff)
downloadlinux-8a03a3692b100d84785ee7a834e9215e304c9e00.tar.bz2
s390/qeth: lock IP table while applying takeover changes
Modifying the flags of an IP addr object needs to be protected against eg. concurrent removal of the same object from the IP table. Fixes: 5f78e29ceebf ("qeth: optimize IP handling in rx_mode callback") Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390/net')
-rw-r--r--drivers/s390/net/qeth_l3_sys.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/s390/net/qeth_l3_sys.c b/drivers/s390/net/qeth_l3_sys.c
index e256928092e5..aa676b4090da 100644
--- a/drivers/s390/net/qeth_l3_sys.c
+++ b/drivers/s390/net/qeth_l3_sys.c
@@ -395,6 +395,7 @@ static ssize_t qeth_l3_dev_ipato_enable_store(struct device *dev,
goto out;
card->ipato.enabled = enable;
+ spin_lock_bh(&card->ip_lock);
hash_for_each(card->ip_htable, i, addr, hnode) {
if (addr->type != QETH_IP_TYPE_NORMAL)
continue;
@@ -403,6 +404,7 @@ static ssize_t qeth_l3_dev_ipato_enable_store(struct device *dev,
else if (qeth_l3_is_addr_covered_by_ipato(card, addr))
addr->set_flags |= QETH_IPA_SETIP_TAKEOVER_FLAG;
}
+ spin_unlock_bh(&card->ip_lock);
out:
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;