diff options
| author | Mark Brown <broonie@kernel.org> | 2024-02-19 16:58:41 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2024-02-19 16:58:41 +0000 |
| commit | d68ce3aa8142333a96a071a9a0207f21c04e54cc (patch) | |
| tree | 15754707ec571eb08c8d6308fe2459e46b8a5468 /net/wireless/scan.c | |
| parent | ec29a4d9b7c7329afc61e7932cb91e9b292b2b74 (diff) | |
| parent | b401b621758e46812da61fa58a67c3fd8d91de0d (diff) | |
regulator: Merge up v6.8-rc5
There are dependencies on the PWM fixes for some new work on the PWM
driver.
Diffstat (limited to 'net/wireless/scan.c')
| -rw-r--r-- | net/wireless/scan.c | 59 |
1 files changed, 58 insertions, 1 deletions
diff --git a/net/wireless/scan.c b/net/wireless/scan.c index 2249b1a89d1c..389a52c29bfc 100644 --- a/net/wireless/scan.c +++ b/net/wireless/scan.c @@ -1731,6 +1731,61 @@ static void cfg80211_update_hidden_bsses(struct cfg80211_internal_bss *known, } } +static void cfg80211_check_stuck_ecsa(struct cfg80211_registered_device *rdev, + struct cfg80211_internal_bss *known, + const struct cfg80211_bss_ies *old) +{ + const struct ieee80211_ext_chansw_ie *ecsa; + const struct element *elem_new, *elem_old; + const struct cfg80211_bss_ies *new, *bcn; + + if (known->pub.proberesp_ecsa_stuck) + return; + + new = rcu_dereference_protected(known->pub.proberesp_ies, + lockdep_is_held(&rdev->bss_lock)); + if (WARN_ON(!new)) + return; + + if (new->tsf - old->tsf < USEC_PER_SEC) + return; + + elem_old = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, + old->data, old->len); + if (!elem_old) + return; + + elem_new = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, + new->data, new->len); + if (!elem_new) + return; + + bcn = rcu_dereference_protected(known->pub.beacon_ies, + lockdep_is_held(&rdev->bss_lock)); + if (bcn && + cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, + bcn->data, bcn->len)) + return; + + if (elem_new->datalen != elem_old->datalen) + return; + if (elem_new->datalen < sizeof(struct ieee80211_ext_chansw_ie)) + return; + if (memcmp(elem_new->data, elem_old->data, elem_new->datalen)) + return; + + ecsa = (void *)elem_new->data; + + if (!ecsa->mode) + return; + + if (ecsa->new_ch_num != + ieee80211_frequency_to_channel(known->pub.channel->center_freq)) + return; + + known->pub.proberesp_ecsa_stuck = 1; +} + static bool cfg80211_update_known_bss(struct cfg80211_registered_device *rdev, struct cfg80211_internal_bss *known, @@ -1750,8 +1805,10 @@ cfg80211_update_known_bss(struct cfg80211_registered_device *rdev, /* Override possible earlier Beacon frame IEs */ rcu_assign_pointer(known->pub.ies, new->pub.proberesp_ies); - if (old) + if (old) { + cfg80211_check_stuck_ecsa(rdev, known, old); kfree_rcu((struct cfg80211_bss_ies *)old, rcu_head); + } } if (rcu_access_pointer(new->pub.beacon_ies)) { |