diff options
| author | Jouni Malinen <jouni@qca.qualcomm.com> | 2014-12-11 23:48:55 +0200 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2015-04-09 14:13:39 +0200 |
| commit | 4fd4c6b42691a657dd28b02cc7b66f01e87cb492 (patch) | |
| tree | be85671d01e564b25ce2817f5539b60efe3feea8 | |
| parent | 7ad45878fff07f03049e1c2cd11eca03a27122f7 (diff) | |
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.
Cc: stable@vger.kernel.org (3.16+)
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: Jiri Slaby <jslaby@suse.cz>
| -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 50f6195c8b70..e5af85d10212 100644 --- a/net/wireless/chan.c +++ b/net/wireless/chan.c @@ -368,7 +368,7 @@ 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; @@ -406,7 +406,8 @@ 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) @@ -417,7 +418,9 @@ 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; |