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authorJohannes Berg <johannes@sipsolutions.net>2009-08-21 14:51:05 +0200
committerJohn W. Linville <linville@tuxdriver.com>2009-08-28 14:40:31 -0400
commit3d54d25515838543e56889aa7e48f40d00719368 (patch)
treeac8e7ab50b5fa9e9be64885f86c99a0b6c71892c /net/wireless/wext-compat.c
parentf7969969f416e593bcc7dc24abf3f9fd6c27136d (diff)
downloadlinux-3d54d25515838543e56889aa7e48f40d00719368.tar.bz2
cfg80211: clean up properly on interface type change
When the interface type changes while connected, and the driver does not require the interface to be down for a type change, it is currently possible to get very strange results unless the driver takes special care, which it shouldn't have to. To fix this, take care to disconnect/leave IBSS when changing the interface type -- even if the driver may fail the call. Also process all events that may be pending to avoid running into a situation where an event is reported but only processed after the type has already changed, which would lead to missing events and warnings. A side effect of this is that you will have disconnected or left the IBSS even if the mode change ultimately fails, but since the intention was to change it and thus leave or disconnect, this is not a problem. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/wireless/wext-compat.c')
-rw-r--r--net/wireless/wext-compat.c16
1 files changed, 3 insertions, 13 deletions
diff --git a/net/wireless/wext-compat.c b/net/wireless/wext-compat.c
index c12029b1def0..429dd06a4ecc 100644
--- a/net/wireless/wext-compat.c
+++ b/net/wireless/wext-compat.c
@@ -70,18 +70,8 @@ int cfg80211_wext_siwmode(struct net_device *dev, struct iw_request_info *info,
enum nl80211_iftype type;
int ret;
- if (!wdev)
- return -EOPNOTSUPP;
-
rdev = wiphy_to_dev(wdev->wiphy);
- if (!rdev->ops->change_virtual_intf)
- return -EOPNOTSUPP;
-
- /* don't support changing VLANs, you just re-create them */
- if (wdev->iftype == NL80211_IFTYPE_AP_VLAN)
- return -EOPNOTSUPP;
-
switch (*mode) {
case IW_MODE_INFRA:
type = NL80211_IFTYPE_STATION;
@@ -104,9 +94,9 @@ int cfg80211_wext_siwmode(struct net_device *dev, struct iw_request_info *info,
memset(&vifparams, 0, sizeof(vifparams));
- ret = rdev->ops->change_virtual_intf(wdev->wiphy, dev, type,
- NULL, &vifparams);
- WARN_ON(!ret && wdev->iftype != type);
+ cfg80211_lock_rdev(rdev);
+ ret = cfg80211_change_iface(rdev, dev, type, NULL, &vifparams);
+ cfg80211_unlock_rdev(rdev);
return ret;
}