diff options
Diffstat (limited to 'drivers/net/wireless/iwmc3200wifi/main.c')
| -rw-r--r-- | drivers/net/wireless/iwmc3200wifi/main.c | 732 |
1 files changed, 732 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwmc3200wifi/main.c b/drivers/net/wireless/iwmc3200wifi/main.c new file mode 100644 index 00000000000..8be206d5822 --- /dev/null +++ b/drivers/net/wireless/iwmc3200wifi/main.c @@ -0,0 +1,732 @@ +/* + * Intel Wireless Multicomm 3200 WiFi driver + * + * Copyright (C) 2009 Intel Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * + * Intel Corporation <ilw@linux.intel.com> + * Samuel Ortiz <samuel.ortiz@intel.com> + * Zhu Yi <yi.zhu@intel.com> + * + */ + +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/ieee80211.h> +#include <linux/wireless.h> + +#include "iwm.h" +#include "debug.h" +#include "bus.h" +#include "umac.h" +#include "commands.h" +#include "hal.h" +#include "fw.h" +#include "rx.h" + +static struct iwm_conf def_iwm_conf = { + + .sdio_ior_timeout = 5000, + .init_calib_map = BIT(PHY_CALIBRATE_DC_CMD) | + BIT(PHY_CALIBRATE_LO_CMD) | + BIT(PHY_CALIBRATE_TX_IQ_CMD) | + BIT(PHY_CALIBRATE_RX_IQ_CMD), + .periodic_calib_map = BIT(PHY_CALIBRATE_DC_CMD) | + BIT(PHY_CALIBRATE_LO_CMD) | + BIT(PHY_CALIBRATE_TX_IQ_CMD) | + BIT(PHY_CALIBRATE_RX_IQ_CMD) | + BIT(SHILOH_PHY_CALIBRATE_BASE_BAND_CMD), + .reset_on_fatal_err = 1, + .auto_connect = 1, + .wimax_not_present = 0, + .enable_qos = 1, + .mode = UMAC_MODE_BSS, + + /* UMAC configuration */ + .power_index = 0, + .frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD, + .rts_threshold = IEEE80211_MAX_RTS_THRESHOLD, + .cts_to_self = 0, + + .assoc_timeout = 2, + .roam_timeout = 10, + .wireless_mode = WIRELESS_MODE_11A | WIRELESS_MODE_11G, + .coexist_mode = COEX_MODE_CM, + + /* IBSS */ + .ibss_band = UMAC_BAND_2GHZ, + .ibss_channel = 1, + + .mac_addr = {0x00, 0x02, 0xb3, 0x01, 0x02, 0x03}, +}; + +static int modparam_reset; +module_param_named(reset, modparam_reset, bool, 0644); +MODULE_PARM_DESC(reset, "reset on firmware errors (default 0 [not reset])"); + +int iwm_mode_to_nl80211_iftype(int mode) +{ + switch (mode) { + case UMAC_MODE_BSS: + return NL80211_IFTYPE_STATION; + case UMAC_MODE_IBSS: + return NL80211_IFTYPE_ADHOC; + default: + return NL80211_IFTYPE_UNSPECIFIED; + } + + return 0; +} + +static void iwm_statistics_request(struct work_struct *work) +{ + struct iwm_priv *iwm = + container_of(work, struct iwm_priv, stats_request.work); + + iwm_send_umac_stats_req(iwm, 0); +} + +int __iwm_up(struct iwm_priv *iwm); +int __iwm_down(struct iwm_priv *iwm); + +static void iwm_reset_worker(struct work_struct *work) +{ + struct iwm_priv *iwm; + struct iwm_umac_profile *profile = NULL; + int uninitialized_var(ret), retry = 0; + + iwm = container_of(work, struct iwm_priv, reset_worker); + + /* + * XXX: The iwm->mutex is introduced purely for this reset work, + * because the other users for iwm_up and iwm_down are only netdev + * ndo_open and ndo_stop which are already protected by rtnl. + * Please remove iwm->mutex together if iwm_reset_worker() is not + * required in the future. + */ + if (!mutex_trylock(&iwm->mutex)) { + IWM_WARN(iwm, "We are in the middle of interface bringing " + "UP/DOWN. Skip driver resetting.\n"); + return; + } + + if (iwm->umac_profile_active) { + profile = kmalloc(sizeof(struct iwm_umac_profile), GFP_KERNEL); + if (profile) + memcpy(profile, iwm->umac_profile, sizeof(*profile)); + else + IWM_ERR(iwm, "Couldn't alloc memory for profile\n"); + } + + __iwm_down(iwm); + + while (retry++ < 3) { + ret = __iwm_up(iwm); + if (!ret) + break; + + schedule_timeout_uninterruptible(10 * HZ); + } + + if (ret) { + IWM_WARN(iwm, "iwm_up() failed: %d\n", ret); + + kfree(profile); + goto out; + } + + if (profile) { + IWM_DBG_MLME(iwm, DBG, "Resend UMAC profile\n"); + memcpy(iwm->umac_profile, profile, sizeof(*profile)); + iwm_send_mlme_profile(iwm); + kfree(profile); + } + + out: + mutex_unlock(&iwm->mutex); +} + +static void iwm_watchdog(unsigned long data) +{ + struct iwm_priv *iwm = (struct iwm_priv *)data; + + IWM_WARN(iwm, "Watchdog expired: UMAC stalls!\n"); + + if (modparam_reset) + schedule_work(&iwm->reset_worker); +} + +int iwm_priv_init(struct iwm_priv *iwm) +{ + int i; + char name[32]; + + iwm->status = 0; + INIT_LIST_HEAD(&iwm->pending_notif); + init_waitqueue_head(&iwm->notif_queue); + init_waitqueue_head(&iwm->nonwifi_queue); + init_waitqueue_head(&iwm->mlme_queue); + memcpy(&iwm->conf, &def_iwm_conf, sizeof(struct iwm_conf)); + spin_lock_init(&iwm->tx_credit.lock); + INIT_LIST_HEAD(&iwm->wifi_pending_cmd); + INIT_LIST_HEAD(&iwm->nonwifi_pending_cmd); + iwm->wifi_seq_num = UMAC_WIFI_SEQ_NUM_BASE; + iwm->nonwifi_seq_num = UMAC_NONWIFI_SEQ_NUM_BASE; + spin_lock_init(&iwm->cmd_lock); + iwm->scan_id = 1; + INIT_DELAYED_WORK(&iwm->stats_request, iwm_statistics_request); + INIT_WORK(&iwm->reset_worker, iwm_reset_worker); + INIT_LIST_HEAD(&iwm->bss_list); + + skb_queue_head_init(&iwm->rx_list); + INIT_LIST_HEAD(&iwm->rx_tickets); + for (i = 0; i < IWM_RX_ID_HASH; i++) + INIT_LIST_HEAD(&iwm->rx_packets[i]); + + INIT_WORK(&iwm->rx_worker, iwm_rx_worker); + + iwm->rx_wq = create_singlethread_workqueue(KBUILD_MODNAME "_rx"); + if (!iwm->rx_wq) + return -EAGAIN; + + for (i = 0; i < IWM_TX_QUEUES; i++) { + INIT_WORK(&iwm->txq[i].worker, iwm_tx_worker); + snprintf(name, 32, KBUILD_MODNAME "_tx_%d", i); + iwm->txq[i].id = i; + iwm->txq[i].wq = create_singlethread_workqueue(name); + if (!iwm->txq[i].wq) + return -EAGAIN; + + skb_queue_head_init(&iwm->txq[i].queue); + } + + for (i = 0; i < IWM_NUM_KEYS; i++) + memset(&iwm->keys[i], 0, sizeof(struct iwm_key)); + + iwm->default_key = NULL; + + init_timer(&iwm->watchdog); + iwm->watchdog.function = iwm_watchdog; + iwm->watchdog.data = (unsigned long)iwm; + mutex_init(&iwm->mutex); + + return 0; +} + +void iwm_priv_deinit(struct iwm_priv *iwm) +{ + int i; + + for (i = 0; i < IWM_TX_QUEUES; i++) + destroy_workqueue(iwm->txq[i].wq); + + destroy_workqueue(iwm->rx_wq); +} + +/* + * We reset all the structures, and we reset the UMAC. + * After calling this routine, you're expected to reload + * the firmware. + */ +void iwm_reset(struct iwm_priv *iwm) +{ + struct iwm_notif *notif, *next; + + if (test_bit(IWM_STATUS_READY, &iwm->status)) + iwm_target_reset(iwm); + + iwm->status = 0; + iwm->scan_id = 1; + + list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) { + list_del(¬if->pending); + kfree(notif->buf); + kfree(notif); + } + + iwm_cmd_flush(iwm); + + flush_workqueue(iwm->rx_wq); + + iwm_link_off(iwm); +} + +/* + * Notification code: + * + * We're faced with the following issue: Any host command can + * have an answer or not, and if there's an answer to expect, + * it can be treated synchronously or asynchronously. + * To work around the synchronous answer case, we implemented + * our notification mechanism. + * When a code path needs to wait for a command response + * synchronously, it calls notif_handle(), which waits for the + * right notification to show up, and then process it. Before + * starting to wait, it registered as a waiter for this specific + * answer (by toggling a bit in on of the handler_map), so that + * the rx code knows that it needs to send a notification to the + * waiting processes. It does so by calling iwm_notif_send(), + * which adds the notification to the pending notifications list, + * and then wakes the waiting processes up. + */ +int iwm_notif_send(struct iwm_priv *iwm, struct iwm_wifi_cmd *cmd, + u8 cmd_id, u8 source, u8 *buf, unsigned long buf_size) +{ + struct iwm_notif *notif; + + notif = kzalloc(sizeof(struct iwm_notif), GFP_KERNEL); + if (!notif) { + IWM_ERR(iwm, "Couldn't alloc memory for notification\n"); + return -ENOMEM; + } + + INIT_LIST_HEAD(¬if->pending); + notif->cmd = cmd; + notif->cmd_id = cmd_id; + notif->src = source; + notif->buf = kzalloc(buf_size, GFP_KERNEL); + if (!notif->buf) { + IWM_ERR(iwm, "Couldn't alloc notification buffer\n"); + kfree(notif); + return -ENOMEM; + } + notif->buf_size = buf_size; + memcpy(notif->buf, buf, buf_size); + list_add_tail(¬if->pending, &iwm->pending_notif); + + wake_up_interruptible(&iwm->notif_queue); + + return 0; +} + +static struct iwm_notif *iwm_notif_find(struct iwm_priv *iwm, u32 cmd, + u8 source) +{ + struct iwm_notif *notif, *next; + + list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) { + if ((notif->cmd_id == cmd) && (notif->src == source)) { + list_del(¬if->pending); + return notif; + } + } + + return NULL; +} + +static struct iwm_notif *iwm_notif_wait(struct iwm_priv *iwm, u32 cmd, + u8 source, long timeout) +{ + int ret; + struct iwm_notif *notif; + unsigned long *map = NULL; + + switch (source) { + case IWM_SRC_LMAC: + map = &iwm->lmac_handler_map[0]; + break; + case IWM_SRC_UMAC: + map = &iwm->umac_handler_map[0]; + break; + case IWM_SRC_UDMA: + map = &iwm->udma_handler_map[0]; + break; + } + + set_bit(cmd, map); + + ret = wait_event_interruptible_timeout(iwm->notif_queue, + ((notif = iwm_notif_find(iwm, cmd, source)) != NULL), + timeout); + clear_bit(cmd, map); + + if (!ret) + return NULL; + + return notif; +} + +int iwm_notif_handle(struct iwm_priv *iwm, u32 cmd, u8 source, long timeout) +{ + int ret; + struct iwm_notif *notif; + + notif = iwm_notif_wait(iwm, cmd, source, timeout); + if (!notif) + return -ETIME; + + ret = iwm_rx_handle_resp(iwm, notif->buf, notif->buf_size, notif->cmd); + kfree(notif->buf); + kfree(notif); + + return ret; +} + +static int iwm_config_boot_params(struct iwm_priv *iwm) +{ + struct iwm_udma_nonwifi_cmd target_cmd; + int ret; + + /* check Wimax is off and config debug monitor */ + if (iwm->conf.wimax_not_present) { + u32 data1 = 0x1f; + u32 addr1 = 0x606BE258; + + u32 data2_set = 0x0; + u32 data2_clr = 0x1; + u32 addr2 = 0x606BE100; + + u32 data3 = 0x1; + u32 addr3 = 0x606BEC00; + + target_cmd.resp = 0; + target_cmd.handle_by_hw = 0; + target_cmd.eop = 1; + + target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE; + target_cmd.addr = cpu_to_le32(addr1); + target_cmd.op1_sz = cpu_to_le32(sizeof(u32)); + target_cmd.op2 = 0; + + ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1); + if (ret < 0) { + IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n"); + return ret; + } + + target_cmd.opcode = UMAC_HDI_OUT_OPCODE_READ_MODIFY_WRITE; + target_cmd.addr = cpu_to_le32(addr2); + target_cmd.op1_sz = cpu_to_le32(data2_set); + target_cmd.op2 = cpu_to_le32(data2_clr); + + ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1); + if (ret < 0) { + IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n"); + return ret; + } + + target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE; + target_cmd.addr = cpu_to_le32(addr3); + target_cmd.op1_sz = cpu_to_le32(sizeof(u32)); + target_cmd.op2 = 0; + + ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data3); + if (ret < 0) { + IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n"); + return ret; + } + } + + return 0; +} + +void iwm_init_default_profile(struct iwm_priv *iwm, + struct iwm_umac_profile *profile) +{ + memset(profile, 0, sizeof(struct iwm_umac_profile)); + + profile->sec.auth_type = UMAC_AUTH_TYPE_OPEN; + profile->sec.flags = UMAC_SEC_FLG_LEGACY_PROFILE; + profile->sec.ucast_cipher = UMAC_CIPHER_TYPE_NONE; + profile->sec.mcast_cipher = UMAC_CIPHER_TYPE_NONE; + + if (iwm->conf.enable_qos) + profile->flags |= cpu_to_le16(UMAC_PROFILE_QOS_ALLOWED); + + profile->wireless_mode = iwm->conf.wireless_mode; + profile->mode = cpu_to_le32(iwm->conf.mode); + + profile->ibss.atim = 0; + profile->ibss.beacon_interval = 100; + profile->ibss.join_only = 0; + profile->ibss.band = iwm->conf.ibss_band; + profile->ibss.channel = iwm->conf.ibss_channel; +} + +void iwm_link_on(struct iwm_priv *iwm) +{ + netif_carrier_on(iwm_to_ndev(iwm)); + netif_tx_wake_all_queues(iwm_to_ndev(iwm)); + + iwm_send_umac_stats_req(iwm, 0); +} + +void iwm_link_off(struct iwm_priv *iwm) +{ + struct iw_statistics *wstats = &iwm->wstats; + int i; + + netif_tx_stop_all_queues(iwm_to_ndev(iwm)); + netif_carrier_off(iwm_to_ndev(iwm)); + + for (i = 0; i < IWM_TX_QUEUES; i++) { + skb_queue_purge(&iwm->txq[i].queue); + + iwm->txq[i].concat_count = 0; + iwm->txq[i].concat_ptr = iwm->txq[i].concat_buf; + + flush_workqueue(iwm->txq[i].wq); + } + + iwm_rx_free(iwm); + + cancel_delayed_work_sync(&iwm->stats_request); + memset(wstats, 0, sizeof(struct iw_statistics)); + wstats->qual.updated = IW_QUAL_ALL_INVALID; + + del_timer_sync(&iwm->watchdog); +} + +static void iwm_bss_list_clean(struct iwm_priv *iwm) +{ + struct iwm_bss_info *bss, *next; + + list_for_each_entry_safe(bss, next, &iwm->bss_list, node) { + list_del(&bss->node); + kfree(bss->bss); + kfree(bss); + } +} + +static int iwm_channels_init(struct iwm_priv *iwm) +{ + int ret; + +#ifdef CONFIG_IWM_B0_HW_SUPPORT + if (iwm->conf.hw_b0) { + IWM_INFO(iwm, "Workaround EEPROM channels for B0 hardware\n"); + return 0; + } +#endif + + ret = iwm_send_umac_channel_list(iwm); + if (ret) { + IWM_ERR(iwm, "Send channel list failed\n"); + return ret; + } + + ret = iwm_notif_handle(iwm, UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST, + IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT); + if (ret) { + IWM_ERR(iwm, "Didn't get a channel list notification\n"); + return ret; + } + + return 0; +} + +int __iwm_up(struct iwm_priv *iwm) +{ + int ret; + struct iwm_notif *notif_reboot, *notif_ack = NULL; + + ret = iwm_bus_enable(iwm); + if (ret) { + IWM_ERR(iwm, "Couldn't enable function\n"); + return ret; + } + + iwm_rx_setup_handlers(iwm); + + /* Wait for initial BARKER_REBOOT from hardware */ + notif_reboot = iwm_notif_wait(iwm, IWM_BARKER_REBOOT_NOTIFICATION, + IWM_SRC_UDMA, 2 * HZ); + if (!notif_reboot) { + IWM_ERR(iwm, "Wait for REBOOT_BARKER timeout\n"); + goto err_disable; + } + + /* We send the barker back */ + ret = iwm_bus_send_chunk(iwm, notif_reboot->buf, 16); + if (ret) { + IWM_ERR(iwm, "REBOOT barker response failed\n"); + kfree(notif_reboot); + goto err_disable; + } + + kfree(notif_reboot->buf); + kfree(notif_reboot); + + /* Wait for ACK_BARKER from hardware */ + notif_ack = iwm_notif_wait(iwm, IWM_ACK_BARKER_NOTIFICATION, + IWM_SRC_UDMA, 2 * HZ); + if (!notif_ack) { + IWM_ERR(iwm, "Wait for ACK_BARKER timeout\n"); + goto err_disable; + } + + kfree(notif_ack->buf); + kfree(notif_ack); + + /* We start to config static boot parameters */ + ret = iwm_config_boot_params(iwm); + if (ret) { + IWM_ERR(iwm, "Config boot parameters failed\n"); + goto err_disable; + } + + ret = iwm_read_mac(iwm, iwm_to_ndev(iwm)->dev_addr); + if (ret) { + IWM_ERR(iwm, "MAC reading failed\n"); + goto err_disable; + } + + /* We can load the FWs */ + ret = iwm_load_fw(iwm); + if (ret) { + IWM_ERR(iwm, "FW loading failed\n"); + goto err_disable; + } + + /* We configure the UMAC and enable the wifi module */ + ret = iwm_send_umac_config(iwm, + cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_CORE_EN) | + cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_LINK_EN) | + cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_MLME_EN)); + if (ret) { + IWM_ERR(iwm, "UMAC config failed\n"); + goto err_fw; + } + + ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS, + IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT); + if (ret) { + IWM_ERR(iwm, "Didn't get a wifi core status notification\n"); + goto err_fw; + } + + if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN | + UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) { + IWM_DBG_BOOT(iwm, DBG, "Not all cores enabled:0x%x\n", + iwm->core_enabled); + ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS, + IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT); + if (ret) { + IWM_ERR(iwm, "Didn't get a core status notification\n"); + goto err_fw; + } + + if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN | + UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) { + IWM_ERR(iwm, "Not all cores enabled: 0x%x\n", + iwm->core_enabled); + goto err_fw; + } else { + IWM_INFO(iwm, "All cores enabled\n"); + } + } + + iwm->umac_profile = kmalloc(sizeof(struct iwm_umac_profile), + GFP_KERNEL); + if (!iwm->umac_profile) { + IWM_ERR(iwm, "Couldn't alloc memory for profile\n"); + goto err_fw; + } + + iwm_init_default_profile(iwm, iwm->umac_profile); + + ret = iwm_channels_init(iwm); + if (ret < 0) { + IWM_ERR(iwm, "Couldn't init channels\n"); + goto err_profile; + } + + /* Set the READY bit to indicate interface is brought up successfully */ + set_bit(IWM_STATUS_READY, &iwm->status); + + return 0; + + err_profile: + kfree(iwm->umac_profile); + iwm->umac_profile = NULL; + + err_fw: + iwm_eeprom_exit(iwm); + + err_disable: + ret = iwm_bus_disable(iwm); + if (ret < 0) + IWM_ERR(iwm, "Couldn't disable function\n"); + + return -EIO; +} + +int iwm_up(struct iwm_priv *iwm) +{ + int ret; + + mutex_lock(&iwm->mutex); + ret = __iwm_up(iwm); + mutex_unlock(&iwm->mutex); + + return ret; +} + +int __iwm_down(struct iwm_priv *iwm) +{ + int ret; + + /* The interface is already down */ + if (!test_bit(IWM_STATUS_READY, &iwm->status)) + return 0; + + if (iwm->scan_request) { + cfg80211_scan_done(iwm->scan_request, true); + iwm->scan_request = NULL; + } + + clear_bit(IWM_STATUS_READY, &iwm->status); + + iwm_eeprom_exit(iwm); + kfree(iwm->umac_profile); + iwm->umac_profile = NULL; + iwm_bss_list_clean(iwm); + + iwm->default_key = NULL; + iwm->core_enabled = 0; + + ret = iwm_bus_disable(iwm); + if (ret < 0) { + IWM_ERR(iwm, "Couldn't disable function\n"); + return ret; + } + + return 0; +} + +int iwm_down(struct iwm_priv *iwm) +{ + int ret; + + mutex_lock(&iwm->mutex); + ret = __iwm_down(iwm); + mutex_unlock(&iwm->mutex); + + return ret; +} |