diff options
| -rw-r--r-- | net/wireless/ibss.c | 7 | ||||
| -rw-r--r-- | net/wireless/mesh.c | 6 | ||||
| -rw-r--r-- | net/wireless/util.c | 31 |
3 files changed, 10 insertions, 34 deletions
diff --git a/net/wireless/ibss.c b/net/wireless/ibss.c index 1470b90e438f..349db9ddc0d1 100644 --- a/net/wireless/ibss.c +++ b/net/wireless/ibss.c @@ -128,12 +128,11 @@ int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, #endif check_chan = params->chandef.chan; if (params->userspace_handles_dfs) { - /* use channel NULL to check for radar even if the current - * channel is not a radar channel - it might decide to change - * to DFS channel later. + /* Check for radar even if the current channel is not + * a radar channel - it might decide to change to DFS + * channel later. */ radar_detect_width = BIT(params->chandef.width); - check_chan = NULL; } err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype, diff --git a/net/wireless/mesh.c b/net/wireless/mesh.c index d42a3fcb2f67..5af5cc6b2c4c 100644 --- a/net/wireless/mesh.c +++ b/net/wireless/mesh.c @@ -236,6 +236,12 @@ int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, if (!netif_running(wdev->netdev)) return -ENETDOWN; + /* cfg80211_can_use_chan() calls + * cfg80211_can_use_iftype_chan() with no radar + * detection, so if we're trying to use a radar + * channel here, something is wrong. + */ + WARN_ON_ONCE(chandef->chan->flags & IEEE80211_CHAN_RADAR); err = cfg80211_can_use_chan(rdev, wdev, chandef->chan, CHAN_MODE_SHARED); if (err) diff --git a/net/wireless/util.c b/net/wireless/util.c index 780b4546c9c7..57b3ce7a6b92 100644 --- a/net/wireless/util.c +++ b/net/wireless/util.c @@ -1269,7 +1269,6 @@ int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, enum cfg80211_chan_mode chmode; int num_different_channels = 0; int total = 1; - bool radar_required = false; int i, j; ASSERT_RTNL(); @@ -1277,35 +1276,7 @@ int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, if (WARN_ON(hweight32(radar_detect) > 1)) return -EINVAL; - switch (iftype) { - case NL80211_IFTYPE_ADHOC: - case NL80211_IFTYPE_AP: - case NL80211_IFTYPE_AP_VLAN: - case NL80211_IFTYPE_MESH_POINT: - case NL80211_IFTYPE_P2P_GO: - case NL80211_IFTYPE_WDS: - /* if the interface could potentially choose a DFS channel, - * then mark DFS as required. - */ - if (!chan) { - if (chanmode != CHAN_MODE_UNDEFINED && radar_detect) - radar_required = true; - break; - } - radar_required = !!(chan->flags & IEEE80211_CHAN_RADAR); - break; - case NL80211_IFTYPE_P2P_CLIENT: - case NL80211_IFTYPE_STATION: - case NL80211_IFTYPE_P2P_DEVICE: - case NL80211_IFTYPE_MONITOR: - break; - case NUM_NL80211_IFTYPES: - case NL80211_IFTYPE_UNSPECIFIED: - default: - return -EINVAL; - } - - if (radar_required && !radar_detect) + if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) return -EINVAL; /* Always allow software iftypes */ |