diff options
| author | Johannes Berg <johannes@sipsolutions.net> | 2009-03-21 17:07:59 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-03-27 20:13:08 -0400 |
| commit | ac7f9cfa2c3b810e0adfb889ad407a8c79a84dbe (patch) | |
| tree | 599a601a2adc5e3806a4bb665491dd08fe2eb3ff /net | |
| parent | 86f04680df4a136a4a90501572dc2f31f8426581 (diff) | |
| download | kernel-common-ac7f9cfa2c3b810e0adfb889ad407a8c79a84dbe.tar.gz kernel-common-ac7f9cfa2c3b810e0adfb889ad407a8c79a84dbe.tar.bz2 kernel-common-ac7f9cfa2c3b810e0adfb889ad407a8c79a84dbe.zip | |
cfg80211: accept no-op interface mode changes
When somebody tries to set the interface mode to the existing
mode, don't ask the driver but silently accept the setting.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/wireless/nl80211.c | 28 | ||||
| -rw-r--r-- | net/wireless/wext-compat.c | 11 |
2 files changed, 30 insertions, 9 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index a7d0b94f6b5e..8808431bd581 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -607,6 +607,7 @@ static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info) enum nl80211_iftype type; struct net_device *dev; u32 _flags, *flags = NULL; + bool change = false; memset(¶ms, 0, sizeof(params)); @@ -620,11 +621,17 @@ static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info) type = dev->ieee80211_ptr->iftype; dev_put(dev); - err = -EINVAL; if (info->attrs[NL80211_ATTR_IFTYPE]) { - type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]); - if (type > NL80211_IFTYPE_MAX) + enum nl80211_iftype ntype; + + ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]); + if (type != ntype) + change = true; + type = ntype; + if (type > NL80211_IFTYPE_MAX) { + err = -EINVAL; goto unlock; + } } if (!drv->ops->change_virtual_intf || @@ -640,6 +647,7 @@ static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info) } params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]); params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]); + change = true; } if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) { @@ -649,12 +657,18 @@ static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info) } err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS], &_flags); - if (!err) - flags = &_flags; + if (err) + goto unlock; + + flags = &_flags; + change = true; } - err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex, - type, flags, ¶ms); + if (change) + err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex, + type, flags, ¶ms); + else + err = 0; dev = __dev_get_by_index(&init_net, ifindex); WARN_ON(!dev || (!err && dev->ieee80211_ptr->iftype != type)); diff --git a/net/wireless/wext-compat.c b/net/wireless/wext-compat.c index b84a9b4fe96a..0fd1db6e95bb 100644 --- a/net/wireless/wext-compat.c +++ b/net/wireless/wext-compat.c @@ -66,6 +66,7 @@ int cfg80211_wext_siwmode(struct net_device *dev, struct iw_request_info *info, struct cfg80211_registered_device *rdev; struct vif_params vifparams; enum nl80211_iftype type; + int ret; if (!wdev) return -EOPNOTSUPP; @@ -96,10 +97,16 @@ int cfg80211_wext_siwmode(struct net_device *dev, struct iw_request_info *info, return -EINVAL; } + if (type == wdev->iftype) + return 0; + memset(&vifparams, 0, sizeof(vifparams)); - return rdev->ops->change_virtual_intf(wdev->wiphy, dev->ifindex, type, - NULL, &vifparams); + ret = rdev->ops->change_virtual_intf(wdev->wiphy, dev->ifindex, type, + NULL, &vifparams); + WARN_ON(!ret && wdev->iftype != type); + + return ret; } EXPORT_SYMBOL(cfg80211_wext_siwmode); |