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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>
This commit is contained in:
Johannes Berg 2009-03-21 17:07:59 +01:00 committed by John W. Linville
parent 86f04680df
commit ac7f9cfa2c
2 changed files with 30 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
net/wireless/nl80211.c
View File

@ -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(&params, 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, &params);
if (change)
err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex,
type, flags, &params);
else
err = 0;
dev = __dev_get_by_index(&init_net, ifindex);
WARN_ON(!dev || (!err && dev->ieee80211_ptr->iftype != type));

11
net/wireless/wext-compat.c
View File

@ -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);