![Gertjan van Wingerde](/assets/img/avatar_default.png)
Fix some pointer errors in the various calls to memcpy, memset and memmove. Although none of these errors are fatal (the expression used now results in the same pointer value) it is better to use the proper expression. All errors are having to deal with arrays. Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com> Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
213 lines
6.1 KiB
C
213 lines
6.1 KiB
C
/*
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Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
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<http://rt2x00.serialmonkey.com>
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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 as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the
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Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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Module: rt2x00lib
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Abstract: rt2x00 generic configuration routines.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include "rt2x00.h"
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#include "rt2x00lib.h"
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void rt2x00lib_config_intf(struct rt2x00_dev *rt2x00dev,
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struct rt2x00_intf *intf,
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enum nl80211_iftype type,
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const u8 *mac, const u8 *bssid)
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{
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struct rt2x00intf_conf conf;
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unsigned int flags = 0;
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conf.type = type;
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switch (type) {
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case NL80211_IFTYPE_ADHOC:
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conf.sync = TSF_SYNC_ADHOC;
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break;
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case NL80211_IFTYPE_AP:
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case NL80211_IFTYPE_MESH_POINT:
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case NL80211_IFTYPE_WDS:
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conf.sync = TSF_SYNC_AP_NONE;
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break;
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case NL80211_IFTYPE_STATION:
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conf.sync = TSF_SYNC_INFRA;
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break;
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default:
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conf.sync = TSF_SYNC_NONE;
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break;
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}
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/*
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* Note that when NULL is passed as address we will send
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* 00:00:00:00:00 to the device to clear the address.
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* This will prevent the device being confused when it wants
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* to ACK frames or consideres itself associated.
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*/
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memset(conf.mac, 0, sizeof(conf.mac));
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if (mac)
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memcpy(conf.mac, mac, ETH_ALEN);
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memset(conf.bssid, 0, sizeof(conf.bssid));
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if (bssid)
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memcpy(conf.bssid, bssid, ETH_ALEN);
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flags |= CONFIG_UPDATE_TYPE;
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if (mac || (!rt2x00dev->intf_ap_count && !rt2x00dev->intf_sta_count))
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flags |= CONFIG_UPDATE_MAC;
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if (bssid || (!rt2x00dev->intf_ap_count && !rt2x00dev->intf_sta_count))
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flags |= CONFIG_UPDATE_BSSID;
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rt2x00dev->ops->lib->config_intf(rt2x00dev, intf, &conf, flags);
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}
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void rt2x00lib_config_erp(struct rt2x00_dev *rt2x00dev,
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struct rt2x00_intf *intf,
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struct ieee80211_bss_conf *bss_conf,
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u32 changed)
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{
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struct rt2x00lib_erp erp;
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memset(&erp, 0, sizeof(erp));
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erp.short_preamble = bss_conf->use_short_preamble;
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erp.cts_protection = bss_conf->use_cts_prot;
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erp.slot_time = bss_conf->use_short_slot ? SHORT_SLOT_TIME : SLOT_TIME;
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erp.sifs = SIFS;
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erp.pifs = bss_conf->use_short_slot ? SHORT_PIFS : PIFS;
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erp.difs = bss_conf->use_short_slot ? SHORT_DIFS : DIFS;
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erp.eifs = bss_conf->use_short_slot ? SHORT_EIFS : EIFS;
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erp.basic_rates = bss_conf->basic_rates;
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erp.beacon_int = bss_conf->beacon_int;
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/* Update global beacon interval time, this is needed for PS support */
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rt2x00dev->beacon_int = bss_conf->beacon_int;
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if (changed & BSS_CHANGED_HT)
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erp.ht_opmode = bss_conf->ht_operation_mode;
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rt2x00dev->ops->lib->config_erp(rt2x00dev, &erp, changed);
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}
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static inline
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enum antenna rt2x00lib_config_antenna_check(enum antenna current_ant,
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enum antenna default_ant)
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{
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if (current_ant != ANTENNA_SW_DIVERSITY)
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return current_ant;
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return (default_ant != ANTENNA_SW_DIVERSITY) ? default_ant : ANTENNA_B;
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}
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void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
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struct antenna_setup config)
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{
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struct link_ant *ant = &rt2x00dev->link.ant;
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struct antenna_setup *def = &rt2x00dev->default_ant;
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struct antenna_setup *active = &rt2x00dev->link.ant.active;
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/*
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* Failsafe: Make sure we are not sending the
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* ANTENNA_SW_DIVERSITY state to the driver.
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* If that happens, fallback to hardware defaults,
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* or our own default.
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*/
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if (!(ant->flags & ANTENNA_RX_DIVERSITY))
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config.rx = rt2x00lib_config_antenna_check(config.rx, def->rx);
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else if (config.rx == ANTENNA_SW_DIVERSITY)
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config.rx = active->rx;
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if (!(ant->flags & ANTENNA_TX_DIVERSITY))
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config.tx = rt2x00lib_config_antenna_check(config.tx, def->tx);
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else if (config.tx == ANTENNA_SW_DIVERSITY)
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config.tx = active->tx;
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/*
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* Antenna setup changes require the RX to be disabled,
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* else the changes will be ignored by the device.
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*/
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if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
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rt2x00queue_stop_queue(rt2x00dev->rx);
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/*
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* Write new antenna setup to device and reset the link tuner.
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* The latter is required since we need to recalibrate the
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* noise-sensitivity ratio for the new setup.
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*/
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rt2x00dev->ops->lib->config_ant(rt2x00dev, &config);
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rt2x00link_reset_tuner(rt2x00dev, true);
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memcpy(active, &config, sizeof(config));
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if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
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rt2x00queue_start_queue(rt2x00dev->rx);
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}
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void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
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struct ieee80211_conf *conf,
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unsigned int ieee80211_flags)
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{
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struct rt2x00lib_conf libconf;
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u16 hw_value;
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memset(&libconf, 0, sizeof(libconf));
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libconf.conf = conf;
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if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL) {
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if (conf_is_ht40(conf)) {
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__set_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags);
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hw_value = rt2x00ht_center_channel(rt2x00dev, conf);
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} else {
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__clear_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags);
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hw_value = conf->channel->hw_value;
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}
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memcpy(&libconf.rf,
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&rt2x00dev->spec.channels[hw_value],
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sizeof(libconf.rf));
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memcpy(&libconf.channel,
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&rt2x00dev->spec.channels_info[hw_value],
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sizeof(libconf.channel));
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}
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/*
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* Start configuration.
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*/
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rt2x00dev->ops->lib->config(rt2x00dev, &libconf, ieee80211_flags);
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/*
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* Some configuration changes affect the link quality
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* which means we need to reset the link tuner.
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*/
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if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL)
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rt2x00link_reset_tuner(rt2x00dev, false);
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rt2x00dev->curr_band = conf->channel->band;
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rt2x00dev->curr_freq = conf->channel->center_freq;
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rt2x00dev->tx_power = conf->power_level;
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rt2x00dev->short_retry = conf->short_frame_max_tx_count;
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rt2x00dev->long_retry = conf->long_frame_max_tx_count;
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}
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