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path: root/drivers/infiniband/ulp/ipoib/ipoib_vlan.c
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Diffstat (limited to 'drivers/infiniband/ulp/ipoib/ipoib_vlan.c')
-rw-r--r--drivers/infiniband/ulp/ipoib/ipoib_vlan.c22
1 files changed, 18 insertions, 4 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_vlan.c b/drivers/infiniband/ulp/ipoib/ipoib_vlan.c
index 081b33deff1b..9927cd6b7082 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_vlan.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_vlan.c
@@ -133,12 +133,20 @@ int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey)
snprintf(intf_name, sizeof intf_name, "%s.%04x",
ppriv->dev->name, pkey);
- if (!rtnl_trylock())
+ if (!mutex_trylock(&ppriv->sysfs_mutex))
return restart_syscall();
+ if (!rtnl_trylock()) {
+ mutex_unlock(&ppriv->sysfs_mutex);
+ return restart_syscall();
+ }
+
priv = ipoib_intf_alloc(ppriv->ca, ppriv->port, intf_name);
- if (!priv)
+ if (!priv) {
+ rtnl_unlock();
+ mutex_unlock(&ppriv->sysfs_mutex);
return -ENOMEM;
+ }
down_write(&ppriv->vlan_rwsem);
@@ -164,8 +172,8 @@ int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey)
out:
up_write(&ppriv->vlan_rwsem);
-
rtnl_unlock();
+ mutex_unlock(&ppriv->sysfs_mutex);
if (result) {
free_netdev(priv->dev);
@@ -188,8 +196,13 @@ int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey)
if (test_bit(IPOIB_FLAG_GOING_DOWN, &ppriv->flags))
return -EPERM;
- if (!rtnl_trylock())
+ if (!mutex_trylock(&ppriv->sysfs_mutex))
+ return restart_syscall();
+
+ if (!rtnl_trylock()) {
+ mutex_unlock(&ppriv->sysfs_mutex);
return restart_syscall();
+ }
down_write(&ppriv->vlan_rwsem);
list_for_each_entry_safe(priv, tpriv, &ppriv->child_intfs, list) {
@@ -208,6 +221,7 @@ int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey)
}
rtnl_unlock();
+ mutex_unlock(&ppriv->sysfs_mutex);
if (dev) {
free_netdev(dev);