s390/qeth: use ip_lock for hsuid configuration

qeth_l3_dev_hsuid_store() changes the ip hash table, which
requires the ip_lock.

Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/s390/net/qeth_l3_sys.c b/drivers/s390/net/qeth_l3_sys.c
index 65645b1..0e00a5c 100644 (file)
--- a/drivers/s390/net/qeth_l3_sys.c
+++ b/drivers/s390/net/qeth_l3_sys.c
@@ -297,7 +297,9 @@ static ssize_t qeth_l3_dev_hsuid_store(struct device *dev,
                addr->u.a6.pfxlen = 0;
                addr->type = QETH_IP_TYPE_NORMAL;
 
+               spin_lock_bh(&card->ip_lock);
                qeth_l3_delete_ip(card, addr);
+               spin_unlock_bh(&card->ip_lock);
                kfree(addr);
        }
 
@@ -329,7 +331,10 @@ static ssize_t qeth_l3_dev_hsuid_store(struct device *dev,
                addr->type = QETH_IP_TYPE_NORMAL;
        } else
                return -ENOMEM;
+
+       spin_lock_bh(&card->ip_lock);
        qeth_l3_add_ip(card, addr);
+       spin_unlock_bh(&card->ip_lock);
        kfree(addr);
 
        return count;