diff options
| author | Jouni Malinen <jouni@qca.qualcomm.com> | 2014-12-11 23:48:55 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-01-27 07:52:31 -0800 |
| commit | b1039f726b3e71de4765a93ac322f01762a24e92 (patch) | |
| tree | bdef012ab54ae5ab3d7248faa71095a6b837f6ad /net | |
| parent | ecdf1f4e8a19fbb398eeac8705e9209d93cd89ac (diff) | |
| download | lwn-b1039f726b3e71de4765a93ac322f01762a24e92.tar.gz lwn-b1039f726b3e71de4765a93ac322f01762a24e92.zip | |
cfg80211: Fix 160 MHz channels with 80+80 and 160 MHz drivers
commit 08f6f147773b23b765b94633a8eaa82e7defcf4c upstream.
The VHT supported channel width field is a two bit integer, not a
bitfield. cfg80211_chandef_usable() was interpreting it incorrectly and
ended up rejecting 160 MHz channel width if the driver indicated support
for both 160 and 80+80 MHz channels.
Fixes: 3d9d1d6656a73 ("nl80211/cfg80211: support VHT channel configuration")
(however, no real drivers had 160 MHz support it until 3.16)
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/wireless/chan.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/net/wireless/chan.c b/net/wireless/chan.c index fd556ac05fdb..e69a17da1e84 100644 --- a/net/wireless/chan.c +++ b/net/wireless/chan.c @@ -338,7 +338,7 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy, { struct ieee80211_sta_ht_cap *ht_cap; struct ieee80211_sta_vht_cap *vht_cap; - u32 width, control_freq; + u32 width, control_freq, cap; if (WARN_ON(!cfg80211_chandef_valid(chandef))) return false; @@ -370,7 +370,8 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy, return false; break; case NL80211_CHAN_WIDTH_80P80: - if (!(vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)) + cap = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; + if (cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) return false; case NL80211_CHAN_WIDTH_80: if (!vht_cap->vht_supported) @@ -381,7 +382,9 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy, case NL80211_CHAN_WIDTH_160: if (!vht_cap->vht_supported) return false; - if (!(vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ)) + cap = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; + if (cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && + cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) return false; prohibited_flags |= IEEE80211_CHAN_NO_160MHZ; width = 160; |