6.11-stable review patch. If anyone has any objections, please let me know.
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From: Karthikeyan Periyasamy quic_periyasa@quicinc.com
[ Upstream commit bd9813d13be439851a7ff3e6372e53caa6e387a6 ]
Currently, wiphy_verify_combinations() fails for the multi-radio per wiphy due to the condition check on new global interface combination that DFS only works on one channel. In a multi-radio scenario, new global interface combination encompasses the capabilities of all radio combinations, so it supports more than one channel with DFS. For multi-radio per wiphy, interface combination verification needs to be performed for radio specific interface combinations. This is necessary as the new global interface combination combines the capabilities of all radio combinations.
Fixes: a01b1e9f9955 ("wifi: mac80211: add support for DFS with multiple radios") Signed-off-by: Karthikeyan Periyasamy quic_periyasa@quicinc.com Link: https://patch.msgid.link/20240917140239.886083-1-quic_periyasa@quicinc.com Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/wireless/core.c | 64 ++++++++++++++++++++++++++++++++++++++------- 1 file changed, 54 insertions(+), 10 deletions(-)
diff --git a/net/wireless/core.c b/net/wireless/core.c index b2b512923ecee..263c91e91fc39 100644 --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -603,16 +603,20 @@ struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv, } EXPORT_SYMBOL(wiphy_new_nm);
-static int wiphy_verify_combinations(struct wiphy *wiphy) +static +int wiphy_verify_iface_combinations(struct wiphy *wiphy, + const struct ieee80211_iface_combination *iface_comb, + int n_iface_comb, + bool combined_radio) { const struct ieee80211_iface_combination *c; int i, j;
- for (i = 0; i < wiphy->n_iface_combinations; i++) { + for (i = 0; i < n_iface_comb; i++) { u32 cnt = 0; u16 all_iftypes = 0;
- c = &wiphy->iface_combinations[i]; + c = &iface_comb[i];
/* * Combinations with just one interface aren't real, @@ -625,9 +629,13 @@ static int wiphy_verify_combinations(struct wiphy *wiphy) if (WARN_ON(!c->num_different_channels)) return -EINVAL;
- /* DFS only works on one channel. */ - if (WARN_ON(c->radar_detect_widths && - (c->num_different_channels > 1))) + /* DFS only works on one channel. Avoid this check + * for multi-radio global combination, since it hold + * the capabilities of all radio combinations. + */ + if (!combined_radio && + WARN_ON(c->radar_detect_widths && + c->num_different_channels > 1)) return -EINVAL;
if (WARN_ON(!c->n_limits)) @@ -648,13 +656,21 @@ static int wiphy_verify_combinations(struct wiphy *wiphy) if (WARN_ON(wiphy->software_iftypes & types)) return -EINVAL;
- /* Only a single P2P_DEVICE can be allowed */ - if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) && + /* Only a single P2P_DEVICE can be allowed, avoid this + * check for multi-radio global combination, since it + * hold the capabilities of all radio combinations. + */ + if (!combined_radio && + WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) && c->limits[j].max > 1)) return -EINVAL;
- /* Only a single NAN can be allowed */ - if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) && + /* Only a single NAN can be allowed, avoid this + * check for multi-radio global combination, since it + * hold the capabilities of all radio combinations. + */ + if (!combined_radio && + WARN_ON(types & BIT(NL80211_IFTYPE_NAN) && c->limits[j].max > 1)) return -EINVAL;
@@ -693,6 +709,34 @@ static int wiphy_verify_combinations(struct wiphy *wiphy) return 0; }
+static int wiphy_verify_combinations(struct wiphy *wiphy) +{ + int i, ret; + bool combined_radio = false; + + if (wiphy->n_radio) { + for (i = 0; i < wiphy->n_radio; i++) { + const struct wiphy_radio *radio = &wiphy->radio[i]; + + ret = wiphy_verify_iface_combinations(wiphy, + radio->iface_combinations, + radio->n_iface_combinations, + false); + if (ret) + return ret; + } + + combined_radio = true; + } + + ret = wiphy_verify_iface_combinations(wiphy, + wiphy->iface_combinations, + wiphy->n_iface_combinations, + combined_radio); + + return ret; +} + int wiphy_register(struct wiphy *wiphy) { struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);