From: Greg Kroah-Hartman gregkh@linuxfoundation.org

stable inclusion from stable-v6.6.6 commit 9099d0682462e8664c8cbbe8989de65e50f62b17 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8SRLX

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...

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This reverts commit 4a7e92551618f3737b305f62451353ee05662f57 which is commit 7e7efdda6adb385fbdfd6f819d76bc68c923c394 upstream.

It needed to have commit 076fc8775daf ("wifi: cfg80211: remove wdev mutex") applied to properly work, otherwise regressions happen.

Link: https://lore.kernel.org/r/e374bb16-5b13-44cc-b11a-2f4eefb1ecf5@manjaro.org Link: https://lore.kernel.org/r/87sf4belmm.fsf@turtle.gmx.de Link: https://lore.kernel.org/r/20231210213930.61378-1-leo@leolam.fr Reported-by: Léo Lam leo@leolam.fr Reported-by: Sven Joachim svenjoac@gmx.de Reported-by: Philip Müller philm@manjaro.org Cc: Johannes Berg johannes.berg@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- net/wireless/core.h | 1 - net/wireless/nl80211.c | 50 ++++++++++++++++-------------------------- 2 files changed, 19 insertions(+), 32 deletions(-)

diff --git a/net/wireless/core.h b/net/wireless/core.h index f0a3a2317638..e536c0b615a0 100644 --- a/net/wireless/core.h +++ b/net/wireless/core.h @@ -299,7 +299,6 @@ struct cfg80211_cqm_config { u32 rssi_hyst; s32 last_rssi_event_value; enum nl80211_cqm_rssi_threshold_event last_rssi_event_type; - bool use_range_api; int n_rssi_thresholds; s32 rssi_thresholds[] __counted_by(n_rssi_thresholds); }; diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 6a82dd876f27..931a03f4549c 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -12824,6 +12824,10 @@ static int cfg80211_cqm_rssi_update(struct cfg80211_registered_device *rdev, int i, n, low_index; int err;

+ /* RSSI reporting disabled? */ + if (!cqm_config) + return rdev_set_cqm_rssi_range_config(rdev, dev, 0, 0); + /* * Obtain current RSSI value if possible, if not and no RSSI threshold * event has been received yet, we should receive an event after a @@ -12898,6 +12902,18 @@ static int nl80211_set_cqm_rssi(struct genl_info *info, wdev->iftype != NL80211_IFTYPE_P2P_CLIENT) return -EOPNOTSUPP;

+ if (n_thresholds <= 1 && rdev->ops->set_cqm_rssi_config) { + if (n_thresholds == 0 || thresholds[0] == 0) /* Disabling */ + return rdev_set_cqm_rssi_config(rdev, dev, 0, 0); + + return rdev_set_cqm_rssi_config(rdev, dev, + thresholds[0], hysteresis); + } + + if (!wiphy_ext_feature_isset(&rdev->wiphy, + NL80211_EXT_FEATURE_CQM_RSSI_LIST)) + return -EOPNOTSUPP; + if (n_thresholds == 1 && thresholds[0] == 0) /* Disabling */ n_thresholds = 0;

@@ -12905,20 +12921,6 @@ static int nl80211_set_cqm_rssi(struct genl_info *info, old = rcu_dereference_protected(wdev->cqm_config, lockdep_is_held(&wdev->mtx));

- /* if already disabled just succeed */ - if (!n_thresholds && !old) - return 0; - - if (n_thresholds > 1) { - if (!wiphy_ext_feature_isset(&rdev->wiphy, - NL80211_EXT_FEATURE_CQM_RSSI_LIST) || - !rdev->ops->set_cqm_rssi_range_config) - return -EOPNOTSUPP; - } else { - if (!rdev->ops->set_cqm_rssi_config) - return -EOPNOTSUPP; - } - if (n_thresholds) { cqm_config = kzalloc(struct_size(cqm_config, rssi_thresholds, n_thresholds), @@ -12933,26 +12935,13 @@ static int nl80211_set_cqm_rssi(struct genl_info *info, memcpy(cqm_config->rssi_thresholds, thresholds, flex_array_size(cqm_config, rssi_thresholds, n_thresholds)); - cqm_config->use_range_api = n_thresholds > 1 || - !rdev->ops->set_cqm_rssi_config;

rcu_assign_pointer(wdev->cqm_config, cqm_config); - - if (cqm_config->use_range_api) - err = cfg80211_cqm_rssi_update(rdev, dev, cqm_config); - else - err = rdev_set_cqm_rssi_config(rdev, dev, - thresholds[0], - hysteresis); } else { RCU_INIT_POINTER(wdev->cqm_config, NULL); - /* if enabled as range also disable via range */ - if (old->use_range_api) - err = rdev_set_cqm_rssi_range_config(rdev, dev, 0, 0); - else - err = rdev_set_cqm_rssi_config(rdev, dev, 0, 0); }

+ err = cfg80211_cqm_rssi_update(rdev, dev, cqm_config); if (err) { rcu_assign_pointer(wdev->cqm_config, old); kfree_rcu(cqm_config, rcu_head); @@ -19142,11 +19131,10 @@ void cfg80211_cqm_rssi_notify_work(struct wiphy *wiphy, struct wiphy_work *work) wdev_lock(wdev); cqm_config = rcu_dereference_protected(wdev->cqm_config, lockdep_is_held(&wdev->mtx)); - if (!cqm_config) + if (!wdev->cqm_config) goto unlock;

- if (cqm_config->use_range_api) - cfg80211_cqm_rssi_update(rdev, wdev->netdev, cqm_config); + cfg80211_cqm_rssi_update(rdev, wdev->netdev, cqm_config);

rssi_level = cqm_config->last_rssi_event_value; rssi_event = cqm_config->last_rssi_event_type;