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A couple of straggler fixes, mostly in the stack:

Browse Source 
* fix fragmentation for multi-link related elements
  * fix callback copy/paste error
  * fix multi-link locking
  * remove double-locking of wiphy mutex
  * transmit only on active links, not all
  * activate links in the correct order
  * don't remove links that weren't added
  * disable soft-IRQs for LQ lock in iwlwifi
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Merge tag 'wireless-2023-06-14' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless

Johannes Berg says:

====================
A couple of straggler fixes, mostly in the stack:
 - fix fragmentation for multi-link related elements
 - fix callback copy/paste error
 - fix multi-link locking
 - remove double-locking of wiphy mutex
 - transmit only on active links, not all
 - activate links in the correct order
 - don't remove links that weren't added
 - disable soft-IRQs for LQ lock in iwlwifi

* tag 'wireless-2023-06-14' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless:
  wifi: iwlwifi: mvm: spin_lock_bh() to fix lockdep regression
  wifi: mac80211: fragment per STA profile correctly
  wifi: mac80211: Use active_links instead of valid_links in Tx
  wifi: cfg80211: remove links only on AP
  wifi: mac80211: take lock before setting vif links
  wifi: cfg80211: fix link del callback to call correct handler
  wifi: mac80211: fix link activation settings order
  wifi: cfg80211: fix double lock bug in reg_wdev_chan_valid()
====================

Link: https://lore.kernel.org/r/20230614075502.11765-1-johannes@sipsolutions.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2023-06-14 21:28:59 -07:00
commit 37cec6ed8d
10 changed files with 36 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/net/wireless/intel/iwlwifi/mvm/rs.c
View File

@ -2692,7 +2692,7 @@ static void rs_drv_get_rate(void *mvm_r, struct ieee80211_sta *sta,
lq_sta = mvm_sta;
spin_lock(&lq_sta->pers.lock);
spin_lock_bh(&lq_sta->pers.lock);
iwl_mvm_hwrate_to_tx_rate_v1(lq_sta->last_rate_n_flags,
info->band, &info->control.rates[0]);
info->control.rates[0].count = 1;
@ -2707,7 +2707,7 @@ static void rs_drv_get_rate(void *mvm_r, struct ieee80211_sta *sta,
iwl_mvm_hwrate_to_tx_rate_v1(last_ucode_rate, info->band,
&txrc->reported_rate);
}
spin_unlock(&lq_sta->pers.lock);
spin_unlock_bh(&lq_sta->pers.lock);
}
static void *rs_drv_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta,
@ -3264,11 +3264,11 @@ void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
/* If it's locked we are in middle of init flow
* just wait for next tx status to update the lq_sta data
*/
if (!spin_trylock(&mvmsta->deflink.lq_sta.rs_drv.pers.lock))
if (!spin_trylock_bh(&mvmsta->deflink.lq_sta.rs_drv.pers.lock))
return;
__iwl_mvm_rs_tx_status(mvm, sta, tid, info, ndp);
spin_unlock(&mvmsta->deflink.lq_sta.rs_drv.pers.lock);
spin_unlock_bh(&mvmsta->deflink.lq_sta.rs_drv.pers.lock);
}
#ifdef CONFIG_MAC80211_DEBUGFS
@ -4117,9 +4117,9 @@ void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm,
} else {
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
spin_lock(&mvmsta->deflink.lq_sta.rs_drv.pers.lock);
spin_lock_bh(&mvmsta->deflink.lq_sta.rs_drv.pers.lock);
rs_drv_rate_init(mvm, sta, band);
spin_unlock(&mvmsta->deflink.lq_sta.rs_drv.pers.lock);
spin_unlock_bh(&mvmsta->deflink.lq_sta.rs_drv.pers.lock);
}
}

9
net/mac80211/cfg.c
View File

@ -4865,11 +4865,16 @@ static int ieee80211_add_intf_link(struct wiphy *wiphy,
unsigned int link_id)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
int res;
if (wdev->use_4addr)
return -EOPNOTSUPP;
return ieee80211_vif_set_links(sdata, wdev->valid_links);
mutex_lock(&sdata->local->mtx);
res = ieee80211_vif_set_links(sdata, wdev->valid_links);
mutex_unlock(&sdata->local->mtx);
return res;
}
static void ieee80211_del_intf_link(struct wiphy *wiphy,
@ -4878,7 +4883,9 @@ static void ieee80211_del_intf_link(struct wiphy *wiphy,
{
struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
mutex_lock(&sdata->local->mtx);
ieee80211_vif_set_links(sdata, wdev->valid_links);
mutex_unlock(&sdata->local->mtx);
}
static int sta_add_link_station(struct ieee80211_local *local,

2
net/mac80211/ieee80211_i.h
View File

@ -2312,7 +2312,7 @@ ieee802_11_parse_elems(const u8 *start, size_t len, bool action,
return ieee802_11_parse_elems_crc(start, len, action, 0, 0, bss);
}
void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos);
void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos, u8 frag_id);
extern const int ieee802_1d_to_ac[8];

4
net/mac80211/link.c
View File

@ -2,7 +2,7 @@
/*
* MLO link handling
*
* Copyright (C) 2022 Intel Corporation
* Copyright (C) 2022-2023 Intel Corporation
*/
#include <linux/slab.h>
#include <linux/kernel.h>
@ -409,6 +409,7 @@ static int _ieee80211_set_active_links(struct ieee80211_sub_if_data *sdata,
IEEE80211_CHANCTX_SHARED);
WARN_ON_ONCE(ret);
ieee80211_mgd_set_link_qos_params(link);
ieee80211_link_info_change_notify(sdata, link,
BSS_CHANGED_ERP_CTS_PROT |
BSS_CHANGED_ERP_PREAMBLE |
@ -423,7 +424,6 @@ static int _ieee80211_set_active_links(struct ieee80211_sub_if_data *sdata,
BSS_CHANGED_TWT |
BSS_CHANGED_HE_OBSS_PD |
BSS_CHANGED_HE_BSS_COLOR);
ieee80211_mgd_set_link_qos_params(link);
}
old_active = sdata->vif.active_links;

5
net/mac80211/mlme.c
View File

@ -1372,10 +1372,11 @@ static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata,
ieee80211_add_non_inheritance_elem(skb, outer_present_elems,
link_present_elems);
ieee80211_fragment_element(skb, subelem_len);
ieee80211_fragment_element(skb, subelem_len,
IEEE80211_MLE_SUBELEM_FRAGMENT);
}
ieee80211_fragment_element(skb, ml_elem_len);
ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT);
}
static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)

6
net/mac80211/tx.c
View File

@ -4445,7 +4445,7 @@ static void ieee80211_mlo_multicast_tx(struct net_device *dev,
struct sk_buff *skb)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
unsigned long links = sdata->vif.valid_links;
unsigned long links = sdata->vif.active_links;
unsigned int link;
u32 ctrl_flags = IEEE80211_TX_CTRL_MCAST_MLO_FIRST_TX;
@ -6040,7 +6040,7 @@ void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
rcu_read_unlock();
if (WARN_ON_ONCE(link == ARRAY_SIZE(sdata->vif.link_conf)))
link = ffs(sdata->vif.valid_links) - 1;
link = ffs(sdata->vif.active_links) - 1;
}
IEEE80211_SKB_CB(skb)->control.flags |=
@ -6076,7 +6076,7 @@ void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
band = chanctx_conf->def.chan->band;
} else {
WARN_ON(link_id >= 0 &&
!(sdata->vif.valid_links & BIT(link_id)));
!(sdata->vif.active_links & BIT(link_id)));
/* MLD transmissions must not rely on the band */
band = 0;
}

4
net/mac80211/util.c
View File

@ -5049,7 +5049,7 @@ u8 *ieee80211_ie_build_eht_cap(u8 *pos,
return pos;
}
void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos)
void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos, u8 frag_id)
{
unsigned int elem_len;
@ -5069,7 +5069,7 @@ void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos)
memmove(len_pos + 255 + 3, len_pos + 255 + 1, elem_len);
/* place the fragment ID */
len_pos += 255 + 1;
*len_pos = WLAN_EID_FRAGMENT;
*len_pos = frag_id;
/* and point to fragment length to update later */
len_pos++;
}

6
net/wireless/rdev-ops.h
View File

@ -2,7 +2,7 @@
/*
* Portions of this file
* Copyright(c) 2016-2017 Intel Deutschland GmbH
* Copyright (C) 2018, 2021-2022 Intel Corporation
* Copyright (C) 2018, 2021-2023 Intel Corporation
*/
#ifndef __CFG80211_RDEV_OPS
#define __CFG80211_RDEV_OPS
@ -1441,8 +1441,8 @@ rdev_del_intf_link(struct cfg80211_registered_device *rdev,
unsigned int link_id)
{
trace_rdev_del_intf_link(&rdev->wiphy, wdev, link_id);
if (rdev->ops->add_intf_link)
rdev->ops->add_intf_link(&rdev->wiphy, wdev, link_id);
if (rdev->ops->del_intf_link)
rdev->ops->del_intf_link(&rdev->wiphy, wdev, link_id);
trace_rdev_return_void(&rdev->wiphy);
}

3
net/wireless/reg.c
View File

@ -2404,11 +2404,8 @@ static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
case NL80211_IFTYPE_P2P_GO:
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_MESH_POINT:
wiphy_lock(wiphy);
ret = cfg80211_reg_can_beacon_relax(wiphy, &chandef,
iftype);
wiphy_unlock(wiphy);
if (!ret)
return ret;
break;

9
net/wireless/util.c
View File

@ -5,7 +5,7 @@
* Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net>
* Copyright 2013-2014 Intel Mobile Communications GmbH
* Copyright 2017 Intel Deutschland GmbH
* Copyright (C) 2018-2022 Intel Corporation
* Copyright (C) 2018-2023 Intel Corporation
*/
#include <linux/export.h>
#include <linux/bitops.h>
@ -2558,6 +2558,13 @@ void cfg80211_remove_links(struct wireless_dev *wdev)
{
unsigned int link_id;
/*
* links are controlled by upper layers (userspace/cfg)
* only for AP mode, so only remove them here for AP
*/
if (wdev->iftype != NL80211_IFTYPE_AP)
return;
wdev_lock(wdev);
if (wdev->valid_links) {
for_each_valid_link(wdev, link_id)