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b446918b77
Currently if a driver does not set hw.max_listen_interval a listen interval of 1 is negotiated with the AP. Thus, the AP could drop buffered frames for us after just one beacon interval which can easily happen with the current powersave and scan implementation. To avoid this issue increase the default interval to 5 which should be a reasonable safe default. Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
755 lines
20 KiB
C
755 lines
20 KiB
C
/*
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* Copyright 2002-2005, Instant802 Networks, Inc.
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* Copyright 2005-2006, Devicescape Software, Inc.
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* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <net/mac80211.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/netdevice.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/skbuff.h>
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#include <linux/etherdevice.h>
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#include <linux/if_arp.h>
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#include <linux/rtnetlink.h>
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#include <linux/bitmap.h>
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#include <linux/pm_qos_params.h>
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#include <net/net_namespace.h>
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#include <net/cfg80211.h>
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#include "ieee80211_i.h"
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#include "driver-ops.h"
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#include "rate.h"
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#include "mesh.h"
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#include "wep.h"
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#include "led.h"
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#include "cfg.h"
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#include "debugfs.h"
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bool ieee80211_disable_40mhz_24ghz;
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module_param(ieee80211_disable_40mhz_24ghz, bool, 0644);
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MODULE_PARM_DESC(ieee80211_disable_40mhz_24ghz,
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"Disable 40MHz support in the 2.4GHz band");
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void ieee80211_configure_filter(struct ieee80211_local *local)
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{
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u64 mc;
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unsigned int changed_flags;
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unsigned int new_flags = 0;
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if (atomic_read(&local->iff_promiscs))
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new_flags |= FIF_PROMISC_IN_BSS;
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if (atomic_read(&local->iff_allmultis))
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new_flags |= FIF_ALLMULTI;
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if (local->monitors || local->scanning)
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new_flags |= FIF_BCN_PRBRESP_PROMISC;
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if (local->fif_fcsfail)
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new_flags |= FIF_FCSFAIL;
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if (local->fif_plcpfail)
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new_flags |= FIF_PLCPFAIL;
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if (local->fif_control)
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new_flags |= FIF_CONTROL;
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if (local->fif_other_bss)
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new_flags |= FIF_OTHER_BSS;
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if (local->fif_pspoll)
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new_flags |= FIF_PSPOLL;
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spin_lock_bh(&local->filter_lock);
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changed_flags = local->filter_flags ^ new_flags;
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mc = drv_prepare_multicast(local, local->mc_count, local->mc_list);
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spin_unlock_bh(&local->filter_lock);
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/* be a bit nasty */
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new_flags |= (1<<31);
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drv_configure_filter(local, changed_flags, &new_flags, mc);
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WARN_ON(new_flags & (1<<31));
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local->filter_flags = new_flags & ~(1<<31);
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}
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static void ieee80211_reconfig_filter(struct work_struct *work)
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{
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struct ieee80211_local *local =
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container_of(work, struct ieee80211_local, reconfig_filter);
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ieee80211_configure_filter(local);
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}
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int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
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{
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struct ieee80211_channel *chan, *scan_chan;
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int ret = 0;
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int power;
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enum nl80211_channel_type channel_type;
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might_sleep();
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scan_chan = local->scan_channel;
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if (scan_chan) {
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chan = scan_chan;
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channel_type = NL80211_CHAN_NO_HT;
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} else if (local->tmp_channel) {
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chan = scan_chan = local->tmp_channel;
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channel_type = local->tmp_channel_type;
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} else {
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chan = local->oper_channel;
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channel_type = local->oper_channel_type;
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}
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if (chan != local->hw.conf.channel ||
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channel_type != local->hw.conf.channel_type) {
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local->hw.conf.channel = chan;
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local->hw.conf.channel_type = channel_type;
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changed |= IEEE80211_CONF_CHANGE_CHANNEL;
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}
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if (!conf_is_ht(&local->hw.conf)) {
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/*
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* mac80211.h documents that this is only valid
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* when the channel is set to an HT type, and
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* that otherwise STATIC is used.
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*/
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local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
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} else if (local->hw.conf.smps_mode != local->smps_mode) {
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local->hw.conf.smps_mode = local->smps_mode;
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changed |= IEEE80211_CONF_CHANGE_SMPS;
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}
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if (scan_chan)
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power = chan->max_power;
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else
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power = local->power_constr_level ?
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(chan->max_power - local->power_constr_level) :
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chan->max_power;
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if (local->user_power_level >= 0)
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power = min(power, local->user_power_level);
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if (local->hw.conf.power_level != power) {
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changed |= IEEE80211_CONF_CHANGE_POWER;
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local->hw.conf.power_level = power;
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}
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if (changed && local->open_count) {
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ret = drv_config(local, changed);
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/*
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* Goal:
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* HW reconfiguration should never fail, the driver has told
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* us what it can support so it should live up to that promise.
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*
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* Current status:
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* rfkill is not integrated with mac80211 and a
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* configuration command can thus fail if hardware rfkill
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* is enabled
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*
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* FIXME: integrate rfkill with mac80211 and then add this
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* WARN_ON() back
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*
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*/
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/* WARN_ON(ret); */
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}
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return ret;
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}
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void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
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u32 changed)
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{
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struct ieee80211_local *local = sdata->local;
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static const u8 zero[ETH_ALEN] = { 0 };
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if (!changed)
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return;
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if (sdata->vif.type == NL80211_IFTYPE_STATION) {
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/*
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* While not associated, claim a BSSID of all-zeroes
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* so that drivers don't do any weird things with the
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* BSSID at that time.
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*/
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if (sdata->vif.bss_conf.assoc)
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sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
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else
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sdata->vif.bss_conf.bssid = zero;
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} else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
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sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
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else if (sdata->vif.type == NL80211_IFTYPE_AP)
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sdata->vif.bss_conf.bssid = sdata->vif.addr;
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else if (ieee80211_vif_is_mesh(&sdata->vif)) {
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sdata->vif.bss_conf.bssid = zero;
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} else {
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WARN_ON(1);
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return;
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}
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switch (sdata->vif.type) {
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case NL80211_IFTYPE_AP:
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case NL80211_IFTYPE_ADHOC:
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case NL80211_IFTYPE_MESH_POINT:
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break;
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default:
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/* do not warn to simplify caller in scan.c */
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changed &= ~BSS_CHANGED_BEACON_ENABLED;
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if (WARN_ON(changed & BSS_CHANGED_BEACON))
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return;
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break;
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}
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if (changed & BSS_CHANGED_BEACON_ENABLED) {
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if (local->quiescing || !ieee80211_sdata_running(sdata) ||
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test_bit(SCAN_SW_SCANNING, &local->scanning)) {
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sdata->vif.bss_conf.enable_beacon = false;
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} else {
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/*
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* Beacon should be enabled, but AP mode must
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* check whether there is a beacon configured.
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*/
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switch (sdata->vif.type) {
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case NL80211_IFTYPE_AP:
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sdata->vif.bss_conf.enable_beacon =
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!!rcu_dereference(sdata->u.ap.beacon);
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break;
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case NL80211_IFTYPE_ADHOC:
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sdata->vif.bss_conf.enable_beacon =
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!!rcu_dereference(sdata->u.ibss.presp);
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break;
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case NL80211_IFTYPE_MESH_POINT:
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sdata->vif.bss_conf.enable_beacon = true;
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break;
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default:
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/* not reached */
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WARN_ON(1);
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break;
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}
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}
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}
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drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
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}
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u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
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{
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sdata->vif.bss_conf.use_cts_prot = false;
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sdata->vif.bss_conf.use_short_preamble = false;
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sdata->vif.bss_conf.use_short_slot = false;
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return BSS_CHANGED_ERP_CTS_PROT |
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BSS_CHANGED_ERP_PREAMBLE |
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BSS_CHANGED_ERP_SLOT;
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}
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static void ieee80211_tasklet_handler(unsigned long data)
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{
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struct ieee80211_local *local = (struct ieee80211_local *) data;
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struct sk_buff *skb;
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struct ieee80211_ra_tid *ra_tid;
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while ((skb = skb_dequeue(&local->skb_queue)) ||
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(skb = skb_dequeue(&local->skb_queue_unreliable))) {
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switch (skb->pkt_type) {
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case IEEE80211_RX_MSG:
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/* Clear skb->pkt_type in order to not confuse kernel
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* netstack. */
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skb->pkt_type = 0;
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ieee80211_rx(local_to_hw(local), skb);
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break;
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case IEEE80211_TX_STATUS_MSG:
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skb->pkt_type = 0;
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ieee80211_tx_status(local_to_hw(local), skb);
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break;
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case IEEE80211_DELBA_MSG:
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ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
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ieee80211_stop_tx_ba_cb(ra_tid->vif, ra_tid->ra,
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ra_tid->tid);
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dev_kfree_skb(skb);
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break;
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case IEEE80211_ADDBA_MSG:
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ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
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ieee80211_start_tx_ba_cb(ra_tid->vif, ra_tid->ra,
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ra_tid->tid);
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dev_kfree_skb(skb);
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break ;
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default:
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WARN(1, "mac80211: Packet is of unknown type %d\n",
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skb->pkt_type);
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dev_kfree_skb(skb);
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break;
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}
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}
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}
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static void ieee80211_restart_work(struct work_struct *work)
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{
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struct ieee80211_local *local =
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container_of(work, struct ieee80211_local, restart_work);
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rtnl_lock();
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ieee80211_reconfig(local);
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rtnl_unlock();
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}
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void ieee80211_restart_hw(struct ieee80211_hw *hw)
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{
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struct ieee80211_local *local = hw_to_local(hw);
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/* use this reason, __ieee80211_resume will unblock it */
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ieee80211_stop_queues_by_reason(hw,
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IEEE80211_QUEUE_STOP_REASON_SUSPEND);
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schedule_work(&local->restart_work);
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}
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EXPORT_SYMBOL(ieee80211_restart_hw);
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static void ieee80211_recalc_smps_work(struct work_struct *work)
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{
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struct ieee80211_local *local =
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container_of(work, struct ieee80211_local, recalc_smps);
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mutex_lock(&local->iflist_mtx);
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ieee80211_recalc_smps(local, NULL);
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mutex_unlock(&local->iflist_mtx);
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}
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struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
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const struct ieee80211_ops *ops)
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{
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struct ieee80211_local *local;
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int priv_size, i;
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struct wiphy *wiphy;
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/* Ensure 32-byte alignment of our private data and hw private data.
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* We use the wiphy priv data for both our ieee80211_local and for
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* the driver's private data
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*
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* In memory it'll be like this:
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*
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* +-------------------------+
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* | struct wiphy |
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* +-------------------------+
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* | struct ieee80211_local |
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* +-------------------------+
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* | driver's private data |
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* +-------------------------+
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*
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*/
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priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
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wiphy = wiphy_new(&mac80211_config_ops, priv_size);
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if (!wiphy)
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return NULL;
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wiphy->flags |= WIPHY_FLAG_NETNS_OK |
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WIPHY_FLAG_4ADDR_AP |
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WIPHY_FLAG_4ADDR_STATION;
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wiphy->privid = mac80211_wiphy_privid;
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wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
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local = wiphy_priv(wiphy);
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local->hw.wiphy = wiphy;
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local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
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BUG_ON(!ops->tx);
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BUG_ON(!ops->start);
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BUG_ON(!ops->stop);
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BUG_ON(!ops->config);
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BUG_ON(!ops->add_interface);
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BUG_ON(!ops->remove_interface);
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BUG_ON(!ops->configure_filter);
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local->ops = ops;
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/* set up some defaults */
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local->hw.queues = 1;
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local->hw.max_rates = 1;
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local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
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local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
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local->user_power_level = -1;
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local->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
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local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
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INIT_LIST_HEAD(&local->interfaces);
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mutex_init(&local->iflist_mtx);
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mutex_init(&local->scan_mtx);
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spin_lock_init(&local->key_lock);
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spin_lock_init(&local->filter_lock);
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spin_lock_init(&local->queue_stop_reason_lock);
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INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
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ieee80211_work_init(local);
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INIT_WORK(&local->restart_work, ieee80211_restart_work);
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INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
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INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work);
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local->smps_mode = IEEE80211_SMPS_OFF;
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INIT_WORK(&local->dynamic_ps_enable_work,
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ieee80211_dynamic_ps_enable_work);
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INIT_WORK(&local->dynamic_ps_disable_work,
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ieee80211_dynamic_ps_disable_work);
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setup_timer(&local->dynamic_ps_timer,
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ieee80211_dynamic_ps_timer, (unsigned long) local);
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sta_info_init(local);
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for (i = 0; i < IEEE80211_MAX_QUEUES; i++)
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skb_queue_head_init(&local->pending[i]);
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tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
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(unsigned long)local);
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tasklet_init(&local->tasklet,
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ieee80211_tasklet_handler,
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(unsigned long) local);
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skb_queue_head_init(&local->skb_queue);
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skb_queue_head_init(&local->skb_queue_unreliable);
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spin_lock_init(&local->ampdu_lock);
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return local_to_hw(local);
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}
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EXPORT_SYMBOL(ieee80211_alloc_hw);
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int ieee80211_register_hw(struct ieee80211_hw *hw)
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{
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struct ieee80211_local *local = hw_to_local(hw);
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int result;
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enum ieee80211_band band;
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int channels, i, j, max_bitrates;
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bool supp_ht;
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static const u32 cipher_suites[] = {
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WLAN_CIPHER_SUITE_WEP40,
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WLAN_CIPHER_SUITE_WEP104,
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WLAN_CIPHER_SUITE_TKIP,
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WLAN_CIPHER_SUITE_CCMP,
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/* keep last -- depends on hw flags! */
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WLAN_CIPHER_SUITE_AES_CMAC
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};
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/*
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* generic code guarantees at least one band,
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* set this very early because much code assumes
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* that hw.conf.channel is assigned
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*/
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channels = 0;
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max_bitrates = 0;
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supp_ht = false;
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for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
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struct ieee80211_supported_band *sband;
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sband = local->hw.wiphy->bands[band];
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if (!sband)
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continue;
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if (!local->oper_channel) {
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/* init channel we're on */
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local->hw.conf.channel =
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local->oper_channel = &sband->channels[0];
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local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
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}
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channels += sband->n_channels;
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if (max_bitrates < sband->n_bitrates)
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max_bitrates = sband->n_bitrates;
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supp_ht = supp_ht || sband->ht_cap.ht_supported;
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}
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local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
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sizeof(void *) * channels, GFP_KERNEL);
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if (!local->int_scan_req)
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return -ENOMEM;
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/* if low-level driver supports AP, we also support VLAN */
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if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP))
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local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
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|
|
/* mac80211 always supports monitor */
|
|
local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
|
|
|
|
if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
|
|
local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
|
|
else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
|
|
local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
|
|
|
|
WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
|
|
&& (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
|
|
"U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
|
|
|
|
/*
|
|
* Calculate scan IE length -- we need this to alloc
|
|
* memory and to subtract from the driver limit. It
|
|
* includes the (extended) supported rates and HT
|
|
* information -- SSID is the driver's responsibility.
|
|
*/
|
|
local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */
|
|
if (supp_ht)
|
|
local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
|
|
|
|
if (!local->ops->hw_scan) {
|
|
/* For hw_scan, driver needs to set these up. */
|
|
local->hw.wiphy->max_scan_ssids = 4;
|
|
local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
|
|
}
|
|
|
|
/*
|
|
* If the driver supports any scan IEs, then assume the
|
|
* limit includes the IEs mac80211 will add, otherwise
|
|
* leave it at zero and let the driver sort it out; we
|
|
* still pass our IEs to the driver but userspace will
|
|
* not be allowed to in that case.
|
|
*/
|
|
if (local->hw.wiphy->max_scan_ie_len)
|
|
local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
|
|
|
|
local->hw.wiphy->cipher_suites = cipher_suites;
|
|
local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
|
|
if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
|
|
local->hw.wiphy->n_cipher_suites--;
|
|
|
|
result = wiphy_register(local->hw.wiphy);
|
|
if (result < 0)
|
|
goto fail_wiphy_register;
|
|
|
|
/*
|
|
* We use the number of queues for feature tests (QoS, HT) internally
|
|
* so restrict them appropriately.
|
|
*/
|
|
if (hw->queues > IEEE80211_MAX_QUEUES)
|
|
hw->queues = IEEE80211_MAX_QUEUES;
|
|
|
|
local->workqueue =
|
|
create_singlethread_workqueue(wiphy_name(local->hw.wiphy));
|
|
if (!local->workqueue) {
|
|
result = -ENOMEM;
|
|
goto fail_workqueue;
|
|
}
|
|
|
|
/*
|
|
* The hardware needs headroom for sending the frame,
|
|
* and we need some headroom for passing the frame to monitor
|
|
* interfaces, but never both at the same time.
|
|
*/
|
|
BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM !=
|
|
sizeof(struct ieee80211_tx_status_rtap_hdr));
|
|
local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
|
|
sizeof(struct ieee80211_tx_status_rtap_hdr));
|
|
|
|
debugfs_hw_add(local);
|
|
|
|
/*
|
|
* if the driver doesn't specify a max listen interval we
|
|
* use 5 which should be a safe default
|
|
*/
|
|
if (local->hw.max_listen_interval == 0)
|
|
local->hw.max_listen_interval = 5;
|
|
|
|
local->hw.conf.listen_interval = local->hw.max_listen_interval;
|
|
|
|
result = sta_info_start(local);
|
|
if (result < 0)
|
|
goto fail_sta_info;
|
|
|
|
result = ieee80211_wep_init(local);
|
|
if (result < 0) {
|
|
printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n",
|
|
wiphy_name(local->hw.wiphy), result);
|
|
goto fail_wep;
|
|
}
|
|
|
|
rtnl_lock();
|
|
|
|
result = ieee80211_init_rate_ctrl_alg(local,
|
|
hw->rate_control_algorithm);
|
|
if (result < 0) {
|
|
printk(KERN_DEBUG "%s: Failed to initialize rate control "
|
|
"algorithm\n", wiphy_name(local->hw.wiphy));
|
|
goto fail_rate;
|
|
}
|
|
|
|
/* add one default STA interface if supported */
|
|
if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
|
|
result = ieee80211_if_add(local, "wlan%d", NULL,
|
|
NL80211_IFTYPE_STATION, NULL);
|
|
if (result)
|
|
printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
|
|
wiphy_name(local->hw.wiphy));
|
|
}
|
|
|
|
rtnl_unlock();
|
|
|
|
ieee80211_led_init(local);
|
|
|
|
/* alloc internal scan request */
|
|
i = 0;
|
|
local->int_scan_req->ssids = &local->scan_ssid;
|
|
local->int_scan_req->n_ssids = 1;
|
|
for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
|
|
if (!hw->wiphy->bands[band])
|
|
continue;
|
|
for (j = 0; j < hw->wiphy->bands[band]->n_channels; j++) {
|
|
local->int_scan_req->channels[i] =
|
|
&hw->wiphy->bands[band]->channels[j];
|
|
i++;
|
|
}
|
|
}
|
|
local->int_scan_req->n_channels = i;
|
|
|
|
local->network_latency_notifier.notifier_call =
|
|
ieee80211_max_network_latency;
|
|
result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
|
|
&local->network_latency_notifier);
|
|
|
|
if (result) {
|
|
rtnl_lock();
|
|
goto fail_pm_qos;
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail_pm_qos:
|
|
ieee80211_led_exit(local);
|
|
ieee80211_remove_interfaces(local);
|
|
fail_rate:
|
|
rtnl_unlock();
|
|
ieee80211_wep_free(local);
|
|
fail_wep:
|
|
sta_info_stop(local);
|
|
fail_sta_info:
|
|
destroy_workqueue(local->workqueue);
|
|
fail_workqueue:
|
|
wiphy_unregister(local->hw.wiphy);
|
|
fail_wiphy_register:
|
|
kfree(local->int_scan_req);
|
|
return result;
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_register_hw);
|
|
|
|
void ieee80211_unregister_hw(struct ieee80211_hw *hw)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
|
|
tasklet_kill(&local->tx_pending_tasklet);
|
|
tasklet_kill(&local->tasklet);
|
|
|
|
pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
|
|
&local->network_latency_notifier);
|
|
|
|
rtnl_lock();
|
|
|
|
/*
|
|
* At this point, interface list manipulations are fine
|
|
* because the driver cannot be handing us frames any
|
|
* more and the tasklet is killed.
|
|
*/
|
|
ieee80211_remove_interfaces(local);
|
|
|
|
rtnl_unlock();
|
|
|
|
cancel_work_sync(&local->reconfig_filter);
|
|
|
|
ieee80211_clear_tx_pending(local);
|
|
sta_info_stop(local);
|
|
rate_control_deinitialize(local);
|
|
|
|
if (skb_queue_len(&local->skb_queue) ||
|
|
skb_queue_len(&local->skb_queue_unreliable))
|
|
printk(KERN_WARNING "%s: skb_queue not empty\n",
|
|
wiphy_name(local->hw.wiphy));
|
|
skb_queue_purge(&local->skb_queue);
|
|
skb_queue_purge(&local->skb_queue_unreliable);
|
|
|
|
destroy_workqueue(local->workqueue);
|
|
wiphy_unregister(local->hw.wiphy);
|
|
ieee80211_wep_free(local);
|
|
ieee80211_led_exit(local);
|
|
kfree(local->int_scan_req);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_unregister_hw);
|
|
|
|
void ieee80211_free_hw(struct ieee80211_hw *hw)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
|
|
mutex_destroy(&local->iflist_mtx);
|
|
mutex_destroy(&local->scan_mtx);
|
|
|
|
wiphy_free(local->hw.wiphy);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_free_hw);
|
|
|
|
static int __init ieee80211_init(void)
|
|
{
|
|
struct sk_buff *skb;
|
|
int ret;
|
|
|
|
BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
|
|
BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
|
|
IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
|
|
|
|
ret = rc80211_minstrel_init();
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = rc80211_pid_init();
|
|
if (ret)
|
|
goto err_pid;
|
|
|
|
ret = ieee80211_iface_init();
|
|
if (ret)
|
|
goto err_netdev;
|
|
|
|
return 0;
|
|
err_netdev:
|
|
rc80211_pid_exit();
|
|
err_pid:
|
|
rc80211_minstrel_exit();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __exit ieee80211_exit(void)
|
|
{
|
|
rc80211_pid_exit();
|
|
rc80211_minstrel_exit();
|
|
|
|
/*
|
|
* For key todo, it'll be empty by now but the work
|
|
* might still be scheduled.
|
|
*/
|
|
flush_scheduled_work();
|
|
|
|
if (mesh_allocated)
|
|
ieee80211s_stop();
|
|
|
|
ieee80211_iface_exit();
|
|
}
|
|
|
|
|
|
subsys_initcall(ieee80211_init);
|
|
module_exit(ieee80211_exit);
|
|
|
|
MODULE_DESCRIPTION("IEEE 802.11 subsystem");
|
|
MODULE_LICENSE("GPL");
|