From: Johannes Berg <johannes.berg@xxxxxxxxx>
Define a guard for the wiphy mutex, and use it in
most code in cfg80211, though not all due to some
interaction with RTNL and/or indentation.
Suggested-by: Jeff Johnson <quic_jjohnson@xxxxxxxxxxx>
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
v2:
- use mutex_lock()/mutex_unlock() to avoid sparse warnings
- fix erroneous semicolon
- remove some botched conversions
- remove some erroneous unlocks
---
include/net/cfg80211.h | 4 +
net/wireless/chan.c | 4 +-
net/wireless/core.c | 47 +++---
net/wireless/mlme.c | 8 +-
net/wireless/nl80211.c | 190 +++++++++-------------
net/wireless/pmsr.c | 4 +-
net/wireless/reg.c | 53 +++----
net/wireless/scan.c | 40 +++--
net/wireless/sme.c | 12 +-
net/wireless/util.c | 7 +-
net/wireless/wext-compat.c | 317 +++++++++++++------------------------
net/wireless/wext-sme.c | 43 ++---
12 files changed, 279 insertions(+), 450 deletions(-)
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 27acf1292a5c..63e79a22a214 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -6031,6 +6031,10 @@ static inline void wiphy_unlock(struct wiphy *wiphy)
mutex_unlock(&wiphy->mtx);
}
+DEFINE_GUARD(wiphy, struct wiphy *,
+ mutex_lock(&_T->mtx),
+ mutex_unlock(&_T->mtx))
+
struct wiphy_work;
typedef void (*wiphy_work_func_t)(struct wiphy *, struct wiphy_work *);
diff --git a/net/wireless/chan.c b/net/wireless/chan.c
index 40b6375a5de4..833ea73053a4 100644
--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -1039,10 +1039,10 @@ bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy,
if (!reg_dfs_domain_same(wiphy, &rdev->wiphy))
continue;
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
found = cfg80211_is_wiphy_oper_chan(&rdev->wiphy, chan) ||
cfg80211_offchan_chain_is_active(rdev, chan);
- wiphy_unlock(&rdev->wiphy);
if (found)
return true;
diff --git a/net/wireless/core.c b/net/wireless/core.c
index afbdc549fb4a..753972d8599d 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -191,7 +191,8 @@ int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
return err;
}
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
if (!wdev->netdev)
continue;
@@ -212,7 +213,6 @@ int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
continue;
nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
}
- wiphy_unlock(&rdev->wiphy);
return 0;
}
@@ -221,9 +221,9 @@ static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
{
struct cfg80211_registered_device *rdev = data;
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
rdev_rfkill_poll(rdev);
- wiphy_unlock(&rdev->wiphy);
}
void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
@@ -283,7 +283,7 @@ void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
/* otherwise, check iftype */
- wiphy_lock(wiphy);
+ guard(wiphy)(wiphy);
switch (wdev->iftype) {
case NL80211_IFTYPE_P2P_DEVICE:
@@ -295,8 +295,6 @@ void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
default:
break;
}
-
- wiphy_unlock(wiphy);
}
}
EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
@@ -331,9 +329,9 @@ static void cfg80211_event_work(struct work_struct *work)
rdev = container_of(work, struct cfg80211_registered_device,
event_work);
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
cfg80211_process_rdev_events(rdev);
- wiphy_unlock(&rdev->wiphy);
}
void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
@@ -347,10 +345,10 @@ void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
if (wdev->netdev)
dev_close(wdev->netdev);
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
cfg80211_leave(rdev, wdev);
cfg80211_remove_virtual_intf(rdev, wdev);
- wiphy_unlock(&rdev->wiphy);
}
}
}
@@ -423,9 +421,9 @@ static void cfg80211_wiphy_work(struct work_struct *work)
trace_wiphy_work_worker_start(&rdev->wiphy);
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
if (rdev->suspended)
- goto out;
+ return;
spin_lock_irq(&rdev->wiphy_work_lock);
wk = list_first_entry_or_null(&rdev->wiphy_work_list,
@@ -441,8 +439,6 @@ static void cfg80211_wiphy_work(struct work_struct *work)
} else {
spin_unlock_irq(&rdev->wiphy_work_lock);
}
-out:
- wiphy_unlock(&rdev->wiphy);
}
/* exported functions */
@@ -1133,9 +1129,8 @@ void wiphy_unregister(struct wiphy *wiphy)
wait_event(rdev->dev_wait, ({
int __count;
- wiphy_lock(&rdev->wiphy);
- __count = rdev->opencount;
- wiphy_unlock(&rdev->wiphy);
+ scoped_guard(wiphy, &rdev->wiphy)
+ __count = rdev->opencount;
__count == 0; }));
if (rdev->wiphy.rfkill)
@@ -1526,9 +1521,9 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
break;
case NETDEV_REGISTER:
if (!wdev->registered) {
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
cfg80211_register_wdev(rdev, wdev);
- wiphy_unlock(&rdev->wiphy);
}
break;
case NETDEV_UNREGISTER:
@@ -1537,16 +1532,16 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
* so check wdev->registered.
*/
if (wdev->registered && !wdev->registering) {
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
_cfg80211_unregister_wdev(wdev, false);
- wiphy_unlock(&rdev->wiphy);
}
break;
case NETDEV_GOING_DOWN:
- wiphy_lock(&rdev->wiphy);
- cfg80211_leave(rdev, wdev);
- cfg80211_remove_links(wdev);
- wiphy_unlock(&rdev->wiphy);
+ scoped_guard(wiphy, &rdev->wiphy) {
+ cfg80211_leave(rdev, wdev);
+ cfg80211_remove_links(wdev);
+ }
/* since we just did cfg80211_leave() nothing to do there */
cancel_work_sync(&wdev->disconnect_wk);
cancel_work_sync(&wdev->pmsr_free_wk);
diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c
index a5eb92d93074..9d577523462d 100644
--- a/net/wireless/mlme.c
+++ b/net/wireless/mlme.c
@@ -627,10 +627,10 @@ void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk)
rdev = container_of(wk, struct cfg80211_registered_device,
mgmt_registrations_update_wk);
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
cfg80211_mgmt_registrations_update(wdev);
- wiphy_unlock(&rdev->wiphy);
}
int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid,
@@ -1193,10 +1193,10 @@ cfg80211_background_cac_event(struct cfg80211_registered_device *rdev,
const struct cfg80211_chan_def *chandef,
enum nl80211_radar_event event)
{
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
__cfg80211_background_cac_event(rdev, rdev->background_radar_wdev,
chandef, event);
- wiphy_unlock(&rdev->wiphy);
}
void cfg80211_background_cac_done_wk(struct work_struct *work)
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 9d2edb71f981..9590f9bd2ec0 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -3626,7 +3626,7 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
} else
wdev = netdev->ieee80211_ptr;
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
/*
* end workaround code, by now the rdev is available
@@ -3639,32 +3639,24 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
rtnl_unlock();
if (result)
- goto out;
+ return result;
if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
struct ieee80211_txq_params txq_params;
struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
- if (!rdev->ops->set_txq_params) {
- result = -EOPNOTSUPP;
- goto out;
- }
+ if (!rdev->ops->set_txq_params)
+ return -EOPNOTSUPP;
- if (!netdev) {
- result = -EINVAL;
- goto out;
- }
+ if (!netdev)
+ return -EINVAL;
if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
- netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
- result = -EINVAL;
- goto out;
- }
+ netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
+ return -EINVAL;
- if (!netif_running(netdev)) {
- result = -ENETDOWN;
- goto out;
- }
+ if (!netif_running(netdev))
+ return -ENETDOWN;
nla_for_each_nested(nl_txq_params,
info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
@@ -3675,10 +3667,11 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
txq_params_policy,
info->extack);
if (result)
- goto out;
+ return result;
+
result = parse_txq_params(tb, &txq_params);
if (result)
- goto out;
+ return result;
txq_params.link_id =
nl80211_link_id_or_invalid(info->attrs);
@@ -3694,7 +3687,7 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
result = rdev_set_txq_params(rdev, netdev,
&txq_params);
if (result)
- goto out;
+ return result;
}
}
@@ -3711,7 +3704,7 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
}
if (result)
- goto out;
+ return result;
}
if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
@@ -3722,19 +3715,15 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
txp_wdev = NULL;
- if (!rdev->ops->set_tx_power) {
- result = -EOPNOTSUPP;
- goto out;
- }
+ if (!rdev->ops->set_tx_power)
+ return -EOPNOTSUPP;
idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
type = nla_get_u32(info->attrs[idx]);
if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
- (type != NL80211_TX_POWER_AUTOMATIC)) {
- result = -EINVAL;
- goto out;
- }
+ (type != NL80211_TX_POWER_AUTOMATIC))
+ return -EINVAL;
if (type != NL80211_TX_POWER_AUTOMATIC) {
idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
@@ -3743,7 +3732,7 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
if (result)
- goto out;
+ return result;
}
if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
@@ -3752,10 +3741,8 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
if ((!rdev->wiphy.available_antennas_tx &&
!rdev->wiphy.available_antennas_rx) ||
- !rdev->ops->set_antenna) {
- result = -EOPNOTSUPP;
- goto out;
- }
+ !rdev->ops->set_antenna)
+ return -EOPNOTSUPP;
tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
@@ -3763,17 +3750,15 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
/* reject antenna configurations which don't match the
* available antenna masks, except for the "all" mask */
if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
- (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
- result = -EINVAL;
- goto out;
- }
+ (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
+ return -EINVAL;
tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
result = rdev_set_antenna(rdev, tx_ant, rx_ant);
if (result)
- goto out;
+ return result;
}
changed = 0;
@@ -3795,10 +3780,8 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
frag_threshold = nla_get_u32(
info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
- if (frag_threshold < 256) {
- result = -EINVAL;
- goto out;
- }
+ if (frag_threshold < 256)
+ return -EINVAL;
if (frag_threshold != (u32) -1) {
/*
@@ -3819,10 +3802,8 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
}
if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
- if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
- result = -EINVAL;
- goto out;
- }
+ if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
+ return -EINVAL;
coverage_class = nla_get_u8(
info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
@@ -3830,20 +3811,17 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
}
if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
- if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION)) {
- result = -EOPNOTSUPP;
- goto out;
- }
+ if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
+ return -EOPNOTSUPP;
changed |= WIPHY_PARAM_DYN_ACK;
}
if (info->attrs[NL80211_ATTR_TXQ_LIMIT]) {
if (!wiphy_ext_feature_isset(&rdev->wiphy,
- NL80211_EXT_FEATURE_TXQS)) {
- result = -EOPNOTSUPP;
- goto out;
- }
+ NL80211_EXT_FEATURE_TXQS))
+ return -EOPNOTSUPP;
+
txq_limit = nla_get_u32(
info->attrs[NL80211_ATTR_TXQ_LIMIT]);
changed |= WIPHY_PARAM_TXQ_LIMIT;
@@ -3851,10 +3829,9 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
if (info->attrs[NL80211_ATTR_TXQ_MEMORY_LIMIT]) {
if (!wiphy_ext_feature_isset(&rdev->wiphy,
- NL80211_EXT_FEATURE_TXQS)) {
- result = -EOPNOTSUPP;
- goto out;
- }
+ NL80211_EXT_FEATURE_TXQS))
+ return -EOPNOTSUPP;
+
txq_memory_limit = nla_get_u32(
info->attrs[NL80211_ATTR_TXQ_MEMORY_LIMIT]);
changed |= WIPHY_PARAM_TXQ_MEMORY_LIMIT;
@@ -3862,10 +3839,9 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
if (info->attrs[NL80211_ATTR_TXQ_QUANTUM]) {
if (!wiphy_ext_feature_isset(&rdev->wiphy,
- NL80211_EXT_FEATURE_TXQS)) {
- result = -EOPNOTSUPP;
- goto out;
- }
+ NL80211_EXT_FEATURE_TXQS))
+ return -EOPNOTSUPP;
+
txq_quantum = nla_get_u32(
info->attrs[NL80211_ATTR_TXQ_QUANTUM]);
changed |= WIPHY_PARAM_TXQ_QUANTUM;
@@ -3877,10 +3853,8 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
u8 old_coverage_class;
u32 old_txq_limit, old_txq_memory_limit, old_txq_quantum;
- if (!rdev->ops->set_wiphy_params) {
- result = -EOPNOTSUPP;
- goto out;
- }
+ if (!rdev->ops->set_wiphy_params)
+ return -EOPNOTSUPP;
old_retry_short = rdev->wiphy.retry_short;
old_retry_long = rdev->wiphy.retry_long;
@@ -3918,15 +3892,11 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
rdev->wiphy.txq_limit = old_txq_limit;
rdev->wiphy.txq_memory_limit = old_txq_memory_limit;
rdev->wiphy.txq_quantum = old_txq_quantum;
- goto out;
+ return result;
}
}
- result = 0;
-
-out:
- wiphy_unlock(&rdev->wiphy);
- return result;
+ return 0;
}
int nl80211_send_chandef(struct sk_buff *msg, const struct cfg80211_chan_def *chandef)
@@ -4144,22 +4114,22 @@ static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *
if_idx = 0;
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
if (if_idx < if_start) {
if_idx++;
continue;
}
+
if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, NLM_F_MULTI,
rdev, wdev,
- NL80211_CMD_NEW_INTERFACE) < 0) {
- wiphy_unlock(&rdev->wiphy);
+ NL80211_CMD_NEW_INTERFACE) < 0)
goto out;
- }
+
if_idx++;
}
- wiphy_unlock(&rdev->wiphy);
if_start = 0;
wp_idx++;
@@ -4517,16 +4487,13 @@ static int _nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev = info->user_ptr[0];
- int ret;
/* to avoid failing a new interface creation due to pending removal */
cfg80211_destroy_ifaces(rdev);
- wiphy_lock(&rdev->wiphy);
- ret = _nl80211_new_interface(skb, info);
- wiphy_unlock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
- return ret;
+ return _nl80211_new_interface(skb, info);
}
static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
@@ -10098,7 +10065,7 @@ static int nl80211_start_radar_detection(struct sk_buff *skb,
struct cfg80211_chan_def chandef;
enum nl80211_dfs_regions dfs_region;
unsigned int cac_time_ms;
- int err = -EINVAL;
+ int err;
flush_delayed_work(&rdev->dfs_update_channels_wk);
@@ -10113,35 +10080,29 @@ static int nl80211_start_radar_detection(struct sk_buff *skb,
return -EINVAL;
}
- wiphy_lock(wiphy);
+ guard(wiphy)(wiphy);
dfs_region = reg_get_dfs_region(wiphy);
if (dfs_region == NL80211_DFS_UNSET)
- goto unlock;
+ return -EINVAL;
err = nl80211_parse_chandef(rdev, info, &chandef);
if (err)
- goto unlock;
+ return err;
err = cfg80211_chandef_dfs_required(wiphy, &chandef, wdev->iftype);
if (err < 0)
- goto unlock;
+ return err;
- if (err == 0) {
- err = -EINVAL;
- goto unlock;
- }
+ if (err == 0)
+ return -EINVAL;
- if (!cfg80211_chandef_dfs_usable(wiphy, &chandef)) {
- err = -EINVAL;
- goto unlock;
- }
+ if (!cfg80211_chandef_dfs_usable(wiphy, &chandef))
+ return -EINVAL;
- if (nla_get_flag(info->attrs[NL80211_ATTR_RADAR_BACKGROUND])) {
- err = cfg80211_start_background_radar_detection(rdev, wdev,
- &chandef);
- goto unlock;
- }
+ if (nla_get_flag(info->attrs[NL80211_ATTR_RADAR_BACKGROUND]))
+ return cfg80211_start_background_radar_detection(rdev, wdev,
+ &chandef);
if (cfg80211_beaconing_iface_active(wdev)) {
/* During MLO other link(s) can beacon, only the current link
@@ -10151,26 +10112,19 @@ static int nl80211_start_radar_detection(struct sk_buff *skb,
!wdev->links[link_id].ap.beacon_interval) {
/* nothing */
} else {
- err = -EBUSY;
- goto unlock;
+ return -EBUSY;
}
}
- if (wdev->links[link_id].cac_started) {
- err = -EBUSY;
- goto unlock;
- }
+ if (wdev->links[link_id].cac_started)
+ return -EBUSY;
/* CAC start is offloaded to HW and can't be started manually */
- if (wiphy_ext_feature_isset(wiphy, NL80211_EXT_FEATURE_DFS_OFFLOAD)) {
- err = -EOPNOTSUPP;
- goto unlock;
- }
+ if (wiphy_ext_feature_isset(wiphy, NL80211_EXT_FEATURE_DFS_OFFLOAD))
+ return -EOPNOTSUPP;
- if (!rdev->ops->start_radar_detection) {
- err = -EOPNOTSUPP;
- goto unlock;
- }
+ if (!rdev->ops->start_radar_detection)
+ return -EOPNOTSUPP;
cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
if (WARN_ON(!cac_time_ms))
@@ -10197,10 +10151,8 @@ static int nl80211_start_radar_detection(struct sk_buff *skb,
wdev->links[link_id].cac_start_time = jiffies;
wdev->links[link_id].cac_time_ms = cac_time_ms;
}
-unlock:
- wiphy_unlock(wiphy);
- return err;
+ return 0;
}
static int nl80211_notify_radar_detection(struct sk_buff *skb,
diff --git a/net/wireless/pmsr.c b/net/wireless/pmsr.c
index 0396fa19bdf1..a117f5093ca2 100644
--- a/net/wireless/pmsr.c
+++ b/net/wireless/pmsr.c
@@ -630,9 +630,9 @@ void cfg80211_pmsr_free_wk(struct work_struct *work)
struct wireless_dev *wdev = container_of(work, struct wireless_dev,
pmsr_free_wk);
- wiphy_lock(wdev->wiphy);
+ guard(wiphy)(wdev->wiphy);
+
cfg80211_pmsr_process_abort(wdev);
- wiphy_unlock(wdev->wiphy);
}
void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev)
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 1df65a5a44f7..2dd0533e7660 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -2465,11 +2465,11 @@ static void reg_leave_invalid_chans(struct wiphy *wiphy)
struct wireless_dev *wdev;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
- wiphy_lock(wiphy);
+ guard(wiphy)(wiphy);
+
list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
if (!reg_wdev_chan_valid(wiphy, wdev))
cfg80211_leave(rdev, wdev);
- wiphy_unlock(wiphy);
}
static void reg_check_chans_work(struct work_struct *work)
@@ -2649,13 +2649,11 @@ void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
return;
rtnl_lock();
- wiphy_lock(wiphy);
-
- tmp = get_wiphy_regdom(wiphy);
- rcu_assign_pointer(wiphy->regd, new_regd);
- rcu_free_regdom(tmp);
-
- wiphy_unlock(wiphy);
+ scoped_guard(wiphy, wiphy) {
+ tmp = get_wiphy_regdom(wiphy);
+ rcu_assign_pointer(wiphy->regd, new_regd);
+ rcu_free_regdom(tmp);
+ }
rtnl_unlock();
}
EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
@@ -2825,9 +2823,9 @@ reg_process_hint_driver(struct wiphy *wiphy,
tmp = get_wiphy_regdom(wiphy);
ASSERT_RTNL();
- wiphy_lock(wiphy);
- rcu_assign_pointer(wiphy->regd, regd);
- wiphy_unlock(wiphy);
+ scoped_guard(wiphy, wiphy) {
+ rcu_assign_pointer(wiphy->regd, regd);
+ }
rcu_free_regdom(tmp);
}
@@ -3205,9 +3203,9 @@ static void reg_process_self_managed_hints(void)
ASSERT_RTNL();
for_each_rdev(rdev) {
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
reg_process_self_managed_hint(&rdev->wiphy);
- wiphy_unlock(&rdev->wiphy);
}
reg_check_channels();
@@ -3600,14 +3598,12 @@ static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag)
struct wireless_dev *wdev;
for_each_rdev(rdev) {
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
- if (!(wdev->wiphy->regulatory_flags & flag)) {
- wiphy_unlock(&rdev->wiphy);
+ if (!(wdev->wiphy->regulatory_flags & flag))
return false;
- }
}
- wiphy_unlock(&rdev->wiphy);
}
return true;
@@ -3883,19 +3879,18 @@ static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
if (!driver_request->intersect) {
ASSERT_RTNL();
- wiphy_lock(request_wiphy);
- if (request_wiphy->regd)
- tmp = get_wiphy_regdom(request_wiphy);
+ scoped_guard(wiphy, request_wiphy) {
+ if (request_wiphy->regd)
+ tmp = get_wiphy_regdom(request_wiphy);
- regd = reg_copy_regd(rd);
- if (IS_ERR(regd)) {
- wiphy_unlock(request_wiphy);
- return PTR_ERR(regd);
+ regd = reg_copy_regd(rd);
+ if (IS_ERR(regd))
+ return PTR_ERR(regd);
+
+ rcu_assign_pointer(request_wiphy->regd, regd);
+ rcu_free_regdom(tmp);
}
- rcu_assign_pointer(request_wiphy->regd, regd);
- rcu_free_regdom(tmp);
- wiphy_unlock(request_wiphy);
reset_regdomains(false, rd);
return 0;
}
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 1c6fd45aa809..d056248c43d2 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -1238,7 +1238,8 @@ void cfg80211_sched_scan_results_wk(struct work_struct *work)
rdev = container_of(work, struct cfg80211_registered_device,
sched_scan_res_wk);
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) {
if (req->report_results) {
req->report_results = false;
@@ -1253,7 +1254,6 @@ void cfg80211_sched_scan_results_wk(struct work_struct *work)
NL80211_CMD_SCHED_SCAN_RESULTS);
}
}
- wiphy_unlock(&rdev->wiphy);
}
void cfg80211_sched_scan_results(struct wiphy *wiphy, u64 reqid)
@@ -1288,9 +1288,9 @@ EXPORT_SYMBOL(cfg80211_sched_scan_stopped_locked);
void cfg80211_sched_scan_stopped(struct wiphy *wiphy, u64 reqid)
{
- wiphy_lock(wiphy);
+ guard(wiphy)(wiphy);
+
cfg80211_sched_scan_stopped_locked(wiphy, reqid);
- wiphy_unlock(wiphy);
}
EXPORT_SYMBOL(cfg80211_sched_scan_stopped);
@@ -3565,10 +3565,8 @@ int cfg80211_wext_siwscan(struct net_device *dev,
/* translate "Scan for SSID" request */
if (wreq) {
if (wrqu->data.flags & IW_SCAN_THIS_ESSID) {
- if (wreq->essid_len > IEEE80211_MAX_SSID_LEN) {
- err = -EINVAL;
- goto out;
- }
+ if (wreq->essid_len > IEEE80211_MAX_SSID_LEN)
+ return -EINVAL;
memcpy(creq->ssids[0].ssid, wreq->essid, wreq->essid_len);
creq->ssids[0].ssid_len = wreq->essid_len;
}
@@ -3584,20 +3582,20 @@ int cfg80211_wext_siwscan(struct net_device *dev,
eth_broadcast_addr(creq->bssid);
- wiphy_lock(&rdev->wiphy);
-
- rdev->scan_req = creq;
- err = rdev_scan(rdev, creq);
- if (err) {
- rdev->scan_req = NULL;
- /* creq will be freed below */
- } else {
- nl80211_send_scan_start(rdev, dev->ieee80211_ptr);
- /* creq now owned by driver */
- creq = NULL;
- dev_hold(dev);
+ scoped_guard(wiphy, &rdev->wiphy) {
+ rdev->scan_req = creq;
+ err = rdev_scan(rdev, creq);
+ if (err) {
+ rdev->scan_req = NULL;
+ /* creq will be freed below */
+ } else {
+ nl80211_send_scan_start(rdev, dev->ieee80211_ptr);
+ /* creq now owned by driver */
+ creq = NULL;
+ dev_hold(dev);
+ }
}
- wiphy_unlock(&rdev->wiphy);
+
out:
kfree(creq);
return err;
diff --git a/net/wireless/sme.c b/net/wireless/sme.c
index 431da30817a6..7a734c8085af 100644
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -251,7 +251,7 @@ void cfg80211_conn_work(struct work_struct *work)
u8 bssid_buf[ETH_ALEN], *bssid = NULL;
enum nl80211_timeout_reason treason;
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
if (!wdev->netdev)
@@ -279,8 +279,6 @@ void cfg80211_conn_work(struct work_struct *work)
__cfg80211_connect_result(wdev->netdev, &cr, false);
}
}
-
- wiphy_unlock(&rdev->wiphy);
}
static void cfg80211_step_auth_next(struct cfg80211_conn *conn,
@@ -692,13 +690,13 @@ static bool cfg80211_is_all_idle(void)
* as chan dfs state, etc.
*/
for_each_rdev(rdev) {
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
if (wdev->conn || wdev->connected ||
cfg80211_beaconing_iface_active(wdev))
is_all_idle = false;
}
- wiphy_unlock(&rdev->wiphy);
}
return is_all_idle;
@@ -1582,7 +1580,7 @@ void cfg80211_autodisconnect_wk(struct work_struct *work)
container_of(work, struct wireless_dev, disconnect_wk);
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
- wiphy_lock(wdev->wiphy);
+ guard(wiphy)(wdev->wiphy);
if (wdev->conn_owner_nlportid) {
switch (wdev->iftype) {
@@ -1618,6 +1616,4 @@ void cfg80211_autodisconnect_wk(struct work_struct *work)
break;
}
}
-
- wiphy_unlock(wdev->wiphy);
}
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 040d62051eb9..c7c6261c9146 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -2572,7 +2572,6 @@ int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr,
{
struct cfg80211_registered_device *rdev;
struct wireless_dev *wdev;
- int ret;
wdev = dev->ieee80211_ptr;
if (!wdev)
@@ -2584,11 +2583,9 @@ int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr,
memset(sinfo, 0, sizeof(*sinfo));
- wiphy_lock(&rdev->wiphy);
- ret = rdev_get_station(rdev, dev, mac_addr, sinfo);
- wiphy_unlock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
- return ret;
+ return rdev_get_station(rdev, dev, mac_addr, sinfo);
}
EXPORT_SYMBOL(cfg80211_get_station);
diff --git a/net/wireless/wext-compat.c b/net/wireless/wext-compat.c
index 90d5c0592667..687f93664d1f 100644
--- a/net/wireless/wext-compat.c
+++ b/net/wireless/wext-compat.c
@@ -39,7 +39,6 @@ int cfg80211_wext_siwmode(struct net_device *dev, struct iw_request_info *info,
struct cfg80211_registered_device *rdev;
struct vif_params vifparams;
enum nl80211_iftype type;
- int ret;
rdev = wiphy_to_rdev(wdev->wiphy);
@@ -62,11 +61,9 @@ int cfg80211_wext_siwmode(struct net_device *dev, struct iw_request_info *info,
memset(&vifparams, 0, sizeof(vifparams));
- wiphy_lock(wdev->wiphy);
- ret = cfg80211_change_iface(rdev, dev, type, &vifparams);
- wiphy_unlock(wdev->wiphy);
+ guard(wiphy)(wdev->wiphy);
- return ret;
+ return cfg80211_change_iface(rdev, dev, type, &vifparams);
}
int cfg80211_wext_giwmode(struct net_device *dev, struct iw_request_info *info,
@@ -258,23 +255,17 @@ int cfg80211_wext_siwrts(struct net_device *dev,
u32 orts = wdev->wiphy->rts_threshold;
int err;
- wiphy_lock(&rdev->wiphy);
- if (rts->disabled || !rts->fixed) {
+ guard(wiphy)(&rdev->wiphy);
+ if (rts->disabled || !rts->fixed)
wdev->wiphy->rts_threshold = (u32) -1;
- } else if (rts->value < 0) {
- err = -EINVAL;
- goto out;
- } else {
+ else if (rts->value < 0)
+ return -EINVAL;
+ else
wdev->wiphy->rts_threshold = rts->value;
- }
err = rdev_set_wiphy_params(rdev, WIPHY_PARAM_RTS_THRESHOLD);
-
if (err)
wdev->wiphy->rts_threshold = orts;
-
-out:
- wiphy_unlock(&rdev->wiphy);
return err;
}
@@ -302,12 +293,12 @@ int cfg80211_wext_siwfrag(struct net_device *dev,
u32 ofrag = wdev->wiphy->frag_threshold;
int err;
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
if (frag->disabled || !frag->fixed) {
wdev->wiphy->frag_threshold = (u32) -1;
} else if (frag->value < 256) {
- err = -EINVAL;
- goto out;
+ return -EINVAL;
} else {
/* Fragment length must be even, so strip LSB. */
wdev->wiphy->frag_threshold = frag->value & ~0x1;
@@ -316,9 +307,6 @@ int cfg80211_wext_siwfrag(struct net_device *dev,
err = rdev_set_wiphy_params(rdev, WIPHY_PARAM_FRAG_THRESHOLD);
if (err)
wdev->wiphy->frag_threshold = ofrag;
-out:
- wiphy_unlock(&rdev->wiphy);
-
return err;
}
@@ -352,7 +340,8 @@ static int cfg80211_wext_siwretry(struct net_device *dev,
(retry->flags & IW_RETRY_TYPE) != IW_RETRY_LIMIT)
return -EINVAL;
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
if (retry->flags & IW_RETRY_LONG) {
wdev->wiphy->retry_long = retry->value;
changed |= WIPHY_PARAM_RETRY_LONG;
@@ -371,7 +360,6 @@ static int cfg80211_wext_siwretry(struct net_device *dev,
wdev->wiphy->retry_short = oshort;
wdev->wiphy->retry_long = olong;
}
- wiphy_unlock(&rdev->wiphy);
return err;
}
@@ -578,9 +566,9 @@ static int cfg80211_wext_siwencode(struct net_device *dev,
struct iw_point *erq = &wrqu->encoding;
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
- int idx, err;
- bool remove = false;
struct key_params params;
+ bool remove = false;
+ int idx;
if (wdev->iftype != NL80211_IFTYPE_STATION &&
wdev->iftype != NL80211_IFTYPE_ADHOC)
@@ -592,11 +580,9 @@ static int cfg80211_wext_siwencode(struct net_device *dev,
!rdev->ops->set_default_key)
return -EOPNOTSUPP;
- wiphy_lock(&rdev->wiphy);
- if (wdev->valid_links) {
- err = -EOPNOTSUPP;
- goto out;
- }
+ guard(wiphy)(&rdev->wiphy);
+ if (wdev->valid_links)
+ return -EOPNOTSUPP;
idx = erq->flags & IW_ENCODE_INDEX;
if (idx == 0) {
@@ -604,8 +590,7 @@ static int cfg80211_wext_siwencode(struct net_device *dev,
if (idx < 0)
idx = 0;
} else if (idx < 1 || idx > 4) {
- err = -EINVAL;
- goto out;
+ return -EINVAL;
} else {
idx--;
}
@@ -614,7 +599,8 @@ static int cfg80211_wext_siwencode(struct net_device *dev,
remove = true;
else if (erq->length == 0) {
/* No key data - just set the default TX key index */
- err = 0;
+ int err = 0;
+
if (wdev->connected ||
(wdev->iftype == NL80211_IFTYPE_ADHOC &&
wdev->u.ibss.current_bss))
@@ -622,28 +608,22 @@ static int cfg80211_wext_siwencode(struct net_device *dev,
true);
if (!err)
wdev->wext.default_key = idx;
- goto out;
+ return err;
}
memset(¶ms, 0, sizeof(params));
params.key = keybuf;
params.key_len = erq->length;
- if (erq->length == 5) {
+ if (erq->length == 5)
params.cipher = WLAN_CIPHER_SUITE_WEP40;
- } else if (erq->length == 13) {
+ else if (erq->length == 13)
params.cipher = WLAN_CIPHER_SUITE_WEP104;
- } else if (!remove) {
- err = -EINVAL;
- goto out;
- }
+ else if (!remove)
+ return -EINVAL;
- err = cfg80211_set_encryption(rdev, dev, false, NULL, remove,
- wdev->wext.default_key == -1,
- idx, ¶ms);
-out:
- wiphy_unlock(&rdev->wiphy);
-
- return err;
+ return cfg80211_set_encryption(rdev, dev, false, NULL, remove,
+ wdev->wext.default_key == -1,
+ idx, ¶ms);
}
static int cfg80211_wext_siwencodeext(struct net_device *dev,
@@ -659,7 +639,6 @@ static int cfg80211_wext_siwencodeext(struct net_device *dev,
bool remove = false;
struct key_params params;
u32 cipher;
- int ret;
if (wdev->iftype != NL80211_IFTYPE_STATION &&
wdev->iftype != NL80211_IFTYPE_ADHOC)
@@ -734,16 +713,13 @@ static int cfg80211_wext_siwencodeext(struct net_device *dev,
params.seq_len = 6;
}
- wiphy_lock(wdev->wiphy);
- ret = cfg80211_set_encryption(
- rdev, dev,
- !(ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY),
- addr, remove,
- ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY,
- idx, ¶ms);
- wiphy_unlock(wdev->wiphy);
+ guard(wiphy)(wdev->wiphy);
- return ret;
+ return cfg80211_set_encryption(rdev, dev,
+ !(ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY),
+ addr, remove,
+ ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY,
+ idx, ¶ms);
}
static int cfg80211_wext_giwencode(struct net_device *dev,
@@ -794,61 +770,41 @@ static int cfg80211_wext_siwfreq(struct net_device *dev,
struct cfg80211_chan_def chandef = {
.width = NL80211_CHAN_WIDTH_20_NOHT,
};
- int freq, ret;
+ int freq;
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
switch (wdev->iftype) {
case NL80211_IFTYPE_STATION:
- ret = cfg80211_mgd_wext_siwfreq(dev, info, wextfreq, extra);
- break;
+ return cfg80211_mgd_wext_siwfreq(dev, info, wextfreq, extra);
case NL80211_IFTYPE_ADHOC:
- ret = cfg80211_ibss_wext_siwfreq(dev, info, wextfreq, extra);
- break;
+ return cfg80211_ibss_wext_siwfreq(dev, info, wextfreq, extra);
case NL80211_IFTYPE_MONITOR:
freq = cfg80211_wext_freq(wextfreq);
- if (freq < 0) {
- ret = freq;
- break;
- }
- if (freq == 0) {
- ret = -EINVAL;
- break;
- }
+ if (freq < 0)
+ return freq;
+ if (freq == 0)
+ return -EINVAL;
+
chandef.center_freq1 = freq;
chandef.chan = ieee80211_get_channel(&rdev->wiphy, freq);
- if (!chandef.chan) {
- ret = -EINVAL;
- break;
- }
- ret = cfg80211_set_monitor_channel(rdev, dev, &chandef);
- break;
+ if (!chandef.chan)
+ return -EINVAL;
+ return cfg80211_set_monitor_channel(rdev, dev, &chandef);
case NL80211_IFTYPE_MESH_POINT:
freq = cfg80211_wext_freq(wextfreq);
- if (freq < 0) {
- ret = freq;
- break;
- }
- if (freq == 0) {
- ret = -EINVAL;
- break;
- }
+ if (freq < 0)
+ return freq;
+ if (freq == 0)
+ return -EINVAL;
chandef.center_freq1 = freq;
chandef.chan = ieee80211_get_channel(&rdev->wiphy, freq);
- if (!chandef.chan) {
- ret = -EINVAL;
- break;
- }
- ret = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
- break;
+ if (!chandef.chan)
+ return -EINVAL;
+ return cfg80211_set_mesh_channel(rdev, wdev, &chandef);
default:
- ret = -EOPNOTSUPP;
- break;
+ return -EOPNOTSUPP;
}
-
- wiphy_unlock(&rdev->wiphy);
-
- return ret;
}
static int cfg80211_wext_giwfreq(struct net_device *dev,
@@ -861,35 +817,26 @@ static int cfg80211_wext_giwfreq(struct net_device *dev,
struct cfg80211_chan_def chandef = {};
int ret;
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
switch (wdev->iftype) {
case NL80211_IFTYPE_STATION:
- ret = cfg80211_mgd_wext_giwfreq(dev, info, freq, extra);
- break;
+ return cfg80211_mgd_wext_giwfreq(dev, info, freq, extra);
case NL80211_IFTYPE_ADHOC:
- ret = cfg80211_ibss_wext_giwfreq(dev, info, freq, extra);
- break;
+ return cfg80211_ibss_wext_giwfreq(dev, info, freq, extra);
case NL80211_IFTYPE_MONITOR:
- if (!rdev->ops->get_channel) {
- ret = -EINVAL;
- break;
- }
+ if (!rdev->ops->get_channel)
+ return -EINVAL;
ret = rdev_get_channel(rdev, wdev, 0, &chandef);
if (ret)
- break;
+ return ret;
freq->m = chandef.chan->center_freq;
freq->e = 6;
- ret = 0;
- break;
+ return ret;
default:
- ret = -EINVAL;
- break;
+ return -EINVAL;
}
-
- wiphy_unlock(&rdev->wiphy);
-
- return ret;
}
static int cfg80211_wext_siwtxpower(struct net_device *dev,
@@ -900,7 +847,6 @@ static int cfg80211_wext_siwtxpower(struct net_device *dev,
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
enum nl80211_tx_power_setting type;
int dbm = 0;
- int ret;
if ((data->txpower.flags & IW_TXPOW_TYPE) != IW_TXPOW_DBM)
return -EINVAL;
@@ -942,11 +888,9 @@ static int cfg80211_wext_siwtxpower(struct net_device *dev,
return 0;
}
- wiphy_lock(&rdev->wiphy);
- ret = rdev_set_tx_power(rdev, wdev, type, DBM_TO_MBM(dbm));
- wiphy_unlock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
- return ret;
+ return rdev_set_tx_power(rdev, wdev, type, DBM_TO_MBM(dbm));
}
static int cfg80211_wext_giwtxpower(struct net_device *dev,
@@ -965,9 +909,9 @@ static int cfg80211_wext_giwtxpower(struct net_device *dev,
if (!rdev->ops->get_tx_power)
return -EOPNOTSUPP;
- wiphy_lock(&rdev->wiphy);
- err = rdev_get_tx_power(rdev, wdev, &val);
- wiphy_unlock(&rdev->wiphy);
+ scoped_guard(wiphy, &rdev->wiphy) {
+ err = rdev_get_tx_power(rdev, wdev, &val);
+ }
if (err)
return err;
@@ -1209,9 +1153,9 @@ static int cfg80211_wext_siwpower(struct net_device *dev,
timeout = wrq->value / 1000;
}
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
err = rdev_set_power_mgmt(rdev, dev, ps, timeout);
- wiphy_unlock(&rdev->wiphy);
if (err)
return err;
@@ -1244,8 +1188,8 @@ static int cfg80211_wext_siwrate(struct net_device *dev,
struct cfg80211_bitrate_mask mask;
u32 fixed, maxrate;
struct ieee80211_supported_band *sband;
- int band, ridx, ret;
bool match = false;
+ int band, ridx;
if (!rdev->ops->set_bitrate_mask)
return -EOPNOTSUPP;
@@ -1283,14 +1227,12 @@ static int cfg80211_wext_siwrate(struct net_device *dev,
if (!match)
return -EINVAL;
- wiphy_lock(&rdev->wiphy);
- if (dev->ieee80211_ptr->valid_links)
- ret = -EOPNOTSUPP;
- else
- ret = rdev_set_bitrate_mask(rdev, dev, 0, NULL, &mask);
- wiphy_unlock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
- return ret;
+ if (dev->ieee80211_ptr->valid_links)
+ return -EOPNOTSUPP;
+
+ return rdev_set_bitrate_mask(rdev, dev, 0, NULL, &mask);
}
static int cfg80211_wext_giwrate(struct net_device *dev,
@@ -1319,9 +1261,9 @@ static int cfg80211_wext_giwrate(struct net_device *dev,
if (err)
return err;
- wiphy_lock(&rdev->wiphy);
- err = rdev_get_station(rdev, dev, addr, &sinfo);
- wiphy_unlock(&rdev->wiphy);
+ scoped_guard(wiphy, &rdev->wiphy) {
+ err = rdev_get_station(rdev, dev, addr, &sinfo);
+ }
if (err)
return err;
@@ -1420,23 +1362,17 @@ static int cfg80211_wext_siwap(struct net_device *dev,
struct sockaddr *ap_addr = &wrqu->ap_addr;
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
- int ret;
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
switch (wdev->iftype) {
case NL80211_IFTYPE_ADHOC:
- ret = cfg80211_ibss_wext_siwap(dev, info, ap_addr, extra);
- break;
+ return cfg80211_ibss_wext_siwap(dev, info, ap_addr, extra);
case NL80211_IFTYPE_STATION:
- ret = cfg80211_mgd_wext_siwap(dev, info, ap_addr, extra);
- break;
+ return cfg80211_mgd_wext_siwap(dev, info, ap_addr, extra);
default:
- ret = -EOPNOTSUPP;
- break;
+ return -EOPNOTSUPP;
}
- wiphy_unlock(&rdev->wiphy);
-
- return ret;
}
static int cfg80211_wext_giwap(struct net_device *dev,
@@ -1446,23 +1382,17 @@ static int cfg80211_wext_giwap(struct net_device *dev,
struct sockaddr *ap_addr = &wrqu->ap_addr;
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
- int ret;
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
switch (wdev->iftype) {
case NL80211_IFTYPE_ADHOC:
- ret = cfg80211_ibss_wext_giwap(dev, info, ap_addr, extra);
- break;
+ return cfg80211_ibss_wext_giwap(dev, info, ap_addr, extra);
case NL80211_IFTYPE_STATION:
- ret = cfg80211_mgd_wext_giwap(dev, info, ap_addr, extra);
- break;
+ return cfg80211_mgd_wext_giwap(dev, info, ap_addr, extra);
default:
- ret = -EOPNOTSUPP;
- break;
+ return -EOPNOTSUPP;
}
- wiphy_unlock(&rdev->wiphy);
-
- return ret;
}
static int cfg80211_wext_siwessid(struct net_device *dev,
@@ -1472,23 +1402,17 @@ static int cfg80211_wext_siwessid(struct net_device *dev,
struct iw_point *data = &wrqu->data;
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
- int ret;
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
switch (wdev->iftype) {
case NL80211_IFTYPE_ADHOC:
- ret = cfg80211_ibss_wext_siwessid(dev, info, data, ssid);
- break;
+ return cfg80211_ibss_wext_siwessid(dev, info, data, ssid);
case NL80211_IFTYPE_STATION:
- ret = cfg80211_mgd_wext_siwessid(dev, info, data, ssid);
- break;
+ return cfg80211_mgd_wext_siwessid(dev, info, data, ssid);
default:
- ret = -EOPNOTSUPP;
- break;
+ return -EOPNOTSUPP;
}
- wiphy_unlock(&rdev->wiphy);
-
- return ret;
}
static int cfg80211_wext_giwessid(struct net_device *dev,
@@ -1498,26 +1422,20 @@ static int cfg80211_wext_giwessid(struct net_device *dev,
struct iw_point *data = &wrqu->data;
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
- int ret;
data->flags = 0;
data->length = 0;
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
switch (wdev->iftype) {
case NL80211_IFTYPE_ADHOC:
- ret = cfg80211_ibss_wext_giwessid(dev, info, data, ssid);
- break;
+ return cfg80211_ibss_wext_giwessid(dev, info, data, ssid);
case NL80211_IFTYPE_STATION:
- ret = cfg80211_mgd_wext_giwessid(dev, info, data, ssid);
- break;
+ return cfg80211_mgd_wext_giwessid(dev, info, data, ssid);
default:
- ret = -EOPNOTSUPP;
- break;
+ return -EOPNOTSUPP;
}
- wiphy_unlock(&rdev->wiphy);
-
- return ret;
}
static int cfg80211_wext_siwpmksa(struct net_device *dev,
@@ -1528,7 +1446,6 @@ static int cfg80211_wext_siwpmksa(struct net_device *dev,
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
struct cfg80211_pmksa cfg_pmksa;
struct iw_pmksa *pmksa = (struct iw_pmksa *)extra;
- int ret;
memset(&cfg_pmksa, 0, sizeof(struct cfg80211_pmksa));
@@ -1538,39 +1455,27 @@ static int cfg80211_wext_siwpmksa(struct net_device *dev,
cfg_pmksa.bssid = pmksa->bssid.sa_data;
cfg_pmksa.pmkid = pmksa->pmkid;
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
switch (pmksa->cmd) {
case IW_PMKSA_ADD:
- if (!rdev->ops->set_pmksa) {
- ret = -EOPNOTSUPP;
- break;
- }
+ if (!rdev->ops->set_pmksa)
+ return -EOPNOTSUPP;
- ret = rdev_set_pmksa(rdev, dev, &cfg_pmksa);
- break;
+ return rdev_set_pmksa(rdev, dev, &cfg_pmksa);
case IW_PMKSA_REMOVE:
- if (!rdev->ops->del_pmksa) {
- ret = -EOPNOTSUPP;
- break;
- }
+ if (!rdev->ops->del_pmksa)
+ return -EOPNOTSUPP;
- ret = rdev_del_pmksa(rdev, dev, &cfg_pmksa);
- break;
+ return rdev_del_pmksa(rdev, dev, &cfg_pmksa);
case IW_PMKSA_FLUSH:
- if (!rdev->ops->flush_pmksa) {
- ret = -EOPNOTSUPP;
- break;
- }
+ if (!rdev->ops->flush_pmksa)
+ return -EOPNOTSUPP;
- ret = rdev_flush_pmksa(rdev, dev);
- break;
+ return rdev_flush_pmksa(rdev, dev);
default:
- ret = -EOPNOTSUPP;
- break;
+ return -EOPNOTSUPP;
}
- wiphy_unlock(&rdev->wiphy);
-
- return ret;
}
static const iw_handler cfg80211_handlers[] = {
diff --git a/net/wireless/wext-sme.c b/net/wireless/wext-sme.c
index 8edd9ada69d0..573b6b15a446 100644
--- a/net/wireless/wext-sme.c
+++ b/net/wireless/wext-sme.c
@@ -302,8 +302,8 @@ int cfg80211_wext_siwgenie(struct net_device *dev,
struct iw_point *data = &wrqu->data;
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
+ int ie_len = data->length;
u8 *ie = extra;
- int ie_len = data->length, err;
if (wdev->iftype != NL80211_IFTYPE_STATION)
return -EOPNOTSUPP;
@@ -311,39 +311,31 @@ int cfg80211_wext_siwgenie(struct net_device *dev,
if (!ie_len)
ie = NULL;
- wiphy_lock(wdev->wiphy);
+ guard(wiphy)(wdev->wiphy);
/* no change */
- err = 0;
if (wdev->wext.ie_len == ie_len &&
memcmp(wdev->wext.ie, ie, ie_len) == 0)
- goto out;
+ return 0;
if (ie_len) {
ie = kmemdup(extra, ie_len, GFP_KERNEL);
- if (!ie) {
- err = -ENOMEM;
- goto out;
- }
- } else
+ if (!ie)
+ return -ENOMEM;
+ } else {
ie = NULL;
+ }
kfree(wdev->wext.ie);
wdev->wext.ie = ie;
wdev->wext.ie_len = ie_len;
- if (wdev->conn) {
- err = cfg80211_disconnect(rdev, dev,
- WLAN_REASON_DEAUTH_LEAVING, false);
- if (err)
- goto out;
- }
+ if (wdev->conn)
+ return cfg80211_disconnect(rdev, dev,
+ WLAN_REASON_DEAUTH_LEAVING, false);
/* userspace better not think we'll reconnect */
- err = 0;
- out:
- wiphy_unlock(wdev->wiphy);
- return err;
+ return 0;
}
int cfg80211_wext_siwmlme(struct net_device *dev,
@@ -353,7 +345,6 @@ int cfg80211_wext_siwmlme(struct net_device *dev,
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct iw_mlme *mlme = (struct iw_mlme *)extra;
struct cfg80211_registered_device *rdev;
- int err;
if (!wdev)
return -EOPNOTSUPP;
@@ -366,17 +357,13 @@ int cfg80211_wext_siwmlme(struct net_device *dev,
if (mlme->addr.sa_family != ARPHRD_ETHER)
return -EINVAL;
- wiphy_lock(&rdev->wiphy);
+ guard(wiphy)(&rdev->wiphy);
+
switch (mlme->cmd) {
case IW_MLME_DEAUTH:
case IW_MLME_DISASSOC:
- err = cfg80211_disconnect(rdev, dev, mlme->reason_code, true);
- break;
+ return cfg80211_disconnect(rdev, dev, mlme->reason_code, true);
default:
- err = -EOPNOTSUPP;
- break;
+ return -EOPNOTSUPP;
}
- wiphy_unlock(&rdev->wiphy);
-
- return err;
}
--
2.47.0
