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cfg80211: honor NL80211_RRF_NO_HT40{MINUS,PLUS}

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Honor the NL80211_RRF_NO_HT40{MINUS,PLUS} flags in
reg_process_ht_flags_channel. Not doing so leads can lead
to a firmware assert in iwlwifi for example.

Fixes: b0d7aa5959 ("cfg80211: allow wiphy specific regdomain management")
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Emmanuel Grumbach 2017-09-06 13:45:40 +03:00 committed by Johannes Berg
parent ba83bfb1e8
commit 4e0854a74f
1 changed files with 18 additions and 2 deletions
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20
net/wireless/reg.c
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@ -4,6 +4,7 @@
* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
* Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
* Copyright 2013-2014 Intel Mobile Communications GmbH
* Copyright 2017 Intel Deutschland GmbH
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@ -1483,7 +1484,9 @@ static void reg_process_ht_flags_channel(struct wiphy *wiphy,
{
struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
const struct ieee80211_regdomain *regd;
unsigned int i;
u32 flags;
if (!is_ht40_allowed(channel)) {
channel->flags |= IEEE80211_CHAN_NO_HT40;
@ -1503,17 +1506,30 @@ static void reg_process_ht_flags_channel(struct wiphy *wiphy,
channel_after = c;
}
flags = 0;
regd = get_wiphy_regdom(wiphy);
if (regd) {
const struct ieee80211_reg_rule *reg_rule =
freq_reg_info_regd(MHZ_TO_KHZ(channel->center_freq),
regd, MHZ_TO_KHZ(20));
if (!IS_ERR(reg_rule))
flags = reg_rule->flags;
}
/*
* Please note that this assumes target bandwidth is 20 MHz,
* if that ever changes we also need to change the below logic
* to include that as well.
*/
if (!is_ht40_allowed(channel_before))
if (!is_ht40_allowed(channel_before) ||
flags & NL80211_RRF_NO_HT40MINUS)
channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
else
channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
if (!is_ht40_allowed(channel_after))
if (!is_ht40_allowed(channel_after) ||
flags & NL80211_RRF_NO_HT40PLUS)
channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
else
channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;