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wireless: fix wrong 160/80+80 MHz setting

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Fix cfg80211_chandef_usable():
consider IEEE80211_VHT_CAP_EXT_NSS_BW when verifying 160/80+80 MHz.

Based on:
"Table 9-272 — Setting of the Supported Channel Width Set subfield and Extended NSS BW
Support subfield at a STA transmitting the VHT Capabilities Information field"
From "Draft P802.11REVmd_D3.0.pdf"

Signed-off-by: Aviad Brikman <aviad.brikman@celeno.com>
Signed-off-by: Shay Bar <shay.bar@celeno.com>
Link: https://lore.kernel.org/r/20200826143139.25976-1-shay.bar@celeno.com
[reformat the code a bit and use u32_get_bits()]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Shay Bar 2020-08-26 17:31:39 +03:00 committed by Johannes Berg
parent f01cfbaf9b
commit 3579994476
1 changed files with 11 additions and 4 deletions
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15
net/wireless/chan.c
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@ -10,6 +10,7 @@
*/
#include <linux/export.h>
#include <linux/bitfield.h>
#include <net/cfg80211.h>
#include "core.h"
#include "rdev-ops.h"
@ -912,6 +913,7 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy,
struct ieee80211_sta_vht_cap *vht_cap;
struct ieee80211_edmg *edmg_cap;
u32 width, control_freq, cap;
bool support_80_80 = false;
if (WARN_ON(!cfg80211_chandef_valid(chandef)))
return false;
@ -979,9 +981,13 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy,
return false;
break;
case NL80211_CHAN_WIDTH_80P80:
cap = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
if (chandef->chan->band != NL80211_BAND_6GHZ &&
cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
cap = vht_cap->cap;
support_80_80 =
(cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
(cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
u32_get_bits(cap, IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) > 1;
if (chandef->chan->band != NL80211_BAND_6GHZ && !support_80_80)
return false;
/* fall through */
case NL80211_CHAN_WIDTH_80:
@ -1001,7 +1007,8 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy,
return false;
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)
cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ &&
!(vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK))
return false;
break;
default: