iwlagn: remove priv dereferences from the transport layer
authorEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Tue, 6 Sep 2011 16:31:18 +0000 (09:31 -0700)
committerJohn W. Linville <linville@tuxdriver.com>
Wed, 14 Sep 2011 17:56:36 +0000 (13:56 -0400)
Another round of clean up on the transport layer.
Define a wrapper around wiphy_rfkill_set_hw_state to prevent the
transport layer from accessing priv->hw.
Also move wait_command_queue to the transport layer.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
drivers/net/wireless/iwlwifi/iwl-agn-ucode.c
drivers/net/wireless/iwlwifi/iwl-agn.c
drivers/net/wireless/iwlwifi/iwl-core.c
drivers/net/wireless/iwlwifi/iwl-dev.h
drivers/net/wireless/iwlwifi/iwl-rx.c
drivers/net/wireless/iwlwifi/iwl-shared.h
drivers/net/wireless/iwlwifi/iwl-sta.c
drivers/net/wireless/iwlwifi/iwl-trans-int-pcie.h
drivers/net/wireless/iwlwifi/iwl-trans-rx-pcie.c
drivers/net/wireless/iwlwifi/iwl-trans-tx-pcie.c
drivers/net/wireless/iwlwifi/iwl-trans.c

index ddb255a..8b14d24 100644 (file)
@@ -114,7 +114,7 @@ static int iwlagn_load_section(struct iwl_priv *priv, const char *name,
                FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD);
 
        IWL_DEBUG_FW(priv, "%s uCode section being loaded...\n", name);
-       ret = wait_event_interruptible_timeout(priv->wait_command_queue,
+       ret = wait_event_interruptible_timeout(priv->shrd->wait_command_queue,
                                        priv->ucode_write_complete, 5 * HZ);
        if (ret == -ERESTARTSYS) {
                IWL_ERR(priv, "Could not load the %s uCode section due "
index 8113fbe..484f889 100644 (file)
@@ -3032,7 +3032,7 @@ static void iwl_setup_deferred_work(struct iwl_priv *priv)
 {
        priv->shrd->workqueue = create_singlethread_workqueue(DRV_NAME);
 
-       init_waitqueue_head(&priv->wait_command_queue);
+       init_waitqueue_head(&priv->shrd->wait_command_queue);
 
        INIT_WORK(&priv->restart, iwl_bg_restart);
        INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
index 72b9203..d9897da 100644 (file)
@@ -868,7 +868,7 @@ void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
         * commands by clearing the ready bit */
        clear_bit(STATUS_READY, &priv->shrd->status);
 
-       wake_up_interruptible(&priv->wait_command_queue);
+       wake_up_interruptible(&priv->shrd->wait_command_queue);
 
        if (!ondemand) {
                /*
@@ -1865,3 +1865,8 @@ void iwl_stop_tx_ba_trans_ready(struct iwl_priv *priv,
 
        ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
 }
+
+void iwl_set_hw_rfkill_state(struct iwl_priv *priv, bool state)
+{
+       wiphy_rfkill_set_hw_state(priv->hw->wiphy, state);
+}
index 1e54293..8ae79e9 100644 (file)
@@ -102,7 +102,7 @@ struct iwl_cmd_meta {
         * invoked for SYNC commands, if it were and its result passed
         * through it would be simpler...)
         */
-       void (*callback)(struct iwl_priv *priv,
+       void (*callback)(struct iwl_shared *shrd,
                         struct iwl_device_cmd *cmd,
                         struct iwl_rx_packet *pkt);
 
@@ -304,7 +304,7 @@ enum iwl_hcmd_dataflag {
 struct iwl_host_cmd {
        const void *data[IWL_MAX_CMD_TFDS];
        unsigned long reply_page;
-       void (*callback)(struct iwl_priv *priv,
+       void (*callback)(struct iwl_shared *shrd,
                         struct iwl_device_cmd *cmd,
                         struct iwl_rx_packet *pkt);
        u32 flags;
@@ -1142,8 +1142,6 @@ struct iwl_priv {
        /* Rate scaling data */
        u8 retry_rate;
 
-       wait_queue_head_t wait_command_queue;
-
        int activity_timer_active;
 
        /* counts mgmt, ctl, and data packets */
index 8572548..ee8fabd 100644 (file)
@@ -563,7 +563,7 @@ static void iwl_rx_card_state_notif(struct iwl_priv *priv,
                wiphy_rfkill_set_hw_state(priv->hw->wiphy,
                        test_bit(STATUS_RF_KILL_HW, &priv->shrd->status));
        else
-               wake_up_interruptible(&priv->wait_command_queue);
+               wake_up_interruptible(&priv->shrd->wait_command_queue);
 }
 
 static void iwl_rx_missed_beacon_notif(struct iwl_priv *priv,
index 8b8cd54..9790d7e 100644 (file)
@@ -250,6 +250,8 @@ struct iwl_shared {
        struct ieee80211_hw *hw;
 
        struct iwl_tid_data tid_data[IWLAGN_STATION_COUNT][IWL_MAX_TID_COUNT];
+
+       wait_queue_head_t wait_command_queue;
 };
 
 /*Whatever _m is (iwl_trans, iwl_priv, iwl_bus, these macros will work */
@@ -361,6 +363,7 @@ void iwl_start_tx_ba_trans_ready(struct iwl_priv *priv,
 void iwl_stop_tx_ba_trans_ready(struct iwl_priv *priv,
                                enum iwl_rxon_context_id ctx,
                                u8 sta_id, u8 tid);
+void iwl_set_hw_rfkill_state(struct iwl_priv *priv, bool state);
 
 /*****************************************************
 * DRIVER STATUS FUNCTIONS
index 26b2bd4..e24135e 100644 (file)
@@ -123,14 +123,14 @@ static int iwl_process_add_sta_resp(struct iwl_priv *priv,
        return ret;
 }
 
-static void iwl_add_sta_callback(struct iwl_priv *priv,
+static void iwl_add_sta_callback(struct iwl_shared *shrd,
                                 struct iwl_device_cmd *cmd,
                                 struct iwl_rx_packet *pkt)
 {
        struct iwl_addsta_cmd *addsta =
                (struct iwl_addsta_cmd *)cmd->cmd.payload;
 
-       iwl_process_add_sta_resp(priv, addsta, pkt, false);
+       iwl_process_add_sta_resp(shrd->priv, addsta, pkt, false);
 
 }
 
index ec4e737..f76526e 100644 (file)
@@ -195,7 +195,8 @@ int iwl_queue_init(struct iwl_queue *q, int count, int slots_num, u32 id);
 int iwl_trans_pcie_send_cmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd);
 int __must_check iwl_trans_pcie_send_cmd_pdu(struct iwl_trans *trans, u8 id,
                        u32 flags, u16 len, const void *data);
-void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb);
+void iwl_tx_cmd_complete(struct iwl_trans *trans,
+                        struct iwl_rx_mem_buffer *rxb);
 void iwl_trans_txq_update_byte_cnt_tbl(struct iwl_trans *trans,
                                           struct iwl_tx_queue *txq,
                                           u16 byte_cnt);
index 2d0ddb8..e22cc6d 100644 (file)
@@ -453,7 +453,7 @@ static void iwl_rx_handle(struct iwl_trans *trans)
                         * iwl_trans_send_cmd()
                         * as we reclaim the driver command queue */
                        if (rxb->page)
-                               iwl_tx_cmd_complete(priv(trans), rxb);
+                               iwl_tx_cmd_complete(trans, rxb);
                        else
                                IWL_WARN(trans, "Claim null rxb?\n");
                }
@@ -646,7 +646,7 @@ static void iwl_irq_handle_error(struct iwl_trans *trans)
                 */
                clear_bit(STATUS_READY, &trans->shrd->status);
                clear_bit(STATUS_HCMD_ACTIVE, &trans->shrd->status);
-               wake_up_interruptible(&priv->wait_command_queue);
+               wake_up_interruptible(&priv->shrd->wait_command_queue);
                IWL_ERR(trans, "RF is used by WiMAX\n");
                return;
        }
@@ -705,18 +705,18 @@ static int iwl_print_event_log(struct iwl_trans *trans, u32 start_idx,
        ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
 
        /* Make sure device is powered up for SRAM reads */
-       spin_lock_irqsave(&bus(priv)->reg_lock, reg_flags);
-       iwl_grab_nic_access(bus(priv));
+       spin_lock_irqsave(&bus(trans)->reg_lock, reg_flags);
+       iwl_grab_nic_access(bus(trans));
 
        /* Set starting address; reads will auto-increment */
-       iwl_write32(bus(priv), HBUS_TARG_MEM_RADDR, ptr);
+       iwl_write32(bus(trans), HBUS_TARG_MEM_RADDR, ptr);
        rmb();
 
        /* "time" is actually "data" for mode 0 (no timestamp).
        * place event id # at far right for easier visual parsing. */
        for (i = 0; i < num_events; i++) {
-               ev = iwl_read32(bus(priv), HBUS_TARG_MEM_RDAT);
-               time = iwl_read32(bus(priv), HBUS_TARG_MEM_RDAT);
+               ev = iwl_read32(bus(trans), HBUS_TARG_MEM_RDAT);
+               time = iwl_read32(bus(trans), HBUS_TARG_MEM_RDAT);
                if (mode == 0) {
                        /* data, ev */
                        if (bufsz) {
@@ -730,7 +730,7 @@ static int iwl_print_event_log(struct iwl_trans *trans, u32 start_idx,
                                        time, ev);
                        }
                } else {
-                       data = iwl_read32(bus(priv), HBUS_TARG_MEM_RDAT);
+                       data = iwl_read32(bus(trans), HBUS_TARG_MEM_RDAT);
                        if (bufsz) {
                                pos += scnprintf(*buf + pos, bufsz - pos,
                                                "EVT_LOGT:%010u:0x%08x:%04u\n",
@@ -745,8 +745,8 @@ static int iwl_print_event_log(struct iwl_trans *trans, u32 start_idx,
        }
 
        /* Allow device to power down */
-       iwl_release_nic_access(bus(priv));
-       spin_unlock_irqrestore(&bus(priv)->reg_lock, reg_flags);
+       iwl_release_nic_access(bus(trans));
+       spin_unlock_irqrestore(&bus(trans)->reg_lock, reg_flags);
        return pos;
 }
 
@@ -823,10 +823,10 @@ int iwl_dump_nic_event_log(struct iwl_trans *trans, bool full_log,
        }
 
        /* event log header */
-       capacity = iwl_read_targ_mem(bus(priv), base);
-       mode = iwl_read_targ_mem(bus(priv), base + (1 * sizeof(u32)));
-       num_wraps = iwl_read_targ_mem(bus(priv), base + (2 * sizeof(u32)));
-       next_entry = iwl_read_targ_mem(bus(priv), base + (3 * sizeof(u32)));
+       capacity = iwl_read_targ_mem(bus(trans), base);
+       mode = iwl_read_targ_mem(bus(trans), base + (1 * sizeof(u32)));
+       num_wraps = iwl_read_targ_mem(bus(trans), base + (2 * sizeof(u32)));
+       next_entry = iwl_read_targ_mem(bus(trans), base + (3 * sizeof(u32)));
 
        if (capacity > logsize) {
                IWL_ERR(trans, "Log capacity %d is bogus, limit to %d "
@@ -908,8 +908,7 @@ void iwl_irq_tasklet(struct iwl_trans *trans)
        u32 inta_mask;
 #endif
 
-       struct iwl_trans_pcie *trans_pcie =
-               IWL_TRANS_GET_PCIE_TRANS(trans);
+       struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
        struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
 
 
@@ -1003,8 +1002,7 @@ void iwl_irq_tasklet(struct iwl_trans *trans)
                        else
                                clear_bit(STATUS_RF_KILL_HW,
                                          &trans->shrd->status);
-                       wiphy_rfkill_set_hw_state(priv(trans)->hw->wiphy,
-                                                 hw_rf_kill);
+                       iwl_set_hw_rfkill_state(priv(trans), hw_rf_kill);
                }
 
                handled |= CSR_INT_BIT_RF_KILL;
@@ -1093,7 +1091,7 @@ void iwl_irq_tasklet(struct iwl_trans *trans)
                handled |= CSR_INT_BIT_FH_TX;
                /* Wake up uCode load routine, now that load is complete */
                priv(trans)->ucode_write_complete = 1;
-               wake_up_interruptible(&priv(trans)->wait_command_queue);
+               wake_up_interruptible(&trans->shrd->wait_command_queue);
        }
 
        if (inta & ~handled) {
index ea6a0bc..32314a6 100644 (file)
@@ -536,7 +536,6 @@ int iwl_trans_pcie_tx_agg_alloc(struct iwl_trans *trans,
        struct iwl_tid_data *tid_data;
        unsigned long flags;
        int txq_id;
-       struct iwl_priv *priv = priv(trans);
 
        txq_id = iwlagn_txq_ctx_activate_free(trans);
        if (txq_id == -1) {
@@ -560,7 +559,7 @@ int iwl_trans_pcie_tx_agg_alloc(struct iwl_trans *trans,
                             "queue\n", tid_data->tfds_in_queue);
                tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
        }
-       spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
+       spin_unlock_irqrestore(&trans->shrd->sta_lock, flags);
 
        return 0;
 }
@@ -856,16 +855,16 @@ static int iwl_enqueue_hcmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
  * need to be reclaimed. As result, some free space forms.  If there is
  * enough free space (> low mark), wake the stack that feeds us.
  */
-static void iwl_hcmd_queue_reclaim(struct iwl_priv *priv, int txq_id, int idx)
+static void iwl_hcmd_queue_reclaim(struct iwl_trans *trans, int txq_id,
+                                  int idx)
 {
-       struct iwl_trans_pcie *trans_pcie =
-               IWL_TRANS_GET_PCIE_TRANS(trans(priv));
+       struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
        struct iwl_tx_queue *txq = &trans_pcie->txq[txq_id];
        struct iwl_queue *q = &txq->q;
        int nfreed = 0;
 
        if ((idx >= q->n_bd) || (iwl_queue_used(q, idx) == 0)) {
-               IWL_ERR(priv, "%s: Read index for DMA queue txq id (%d), "
+               IWL_ERR(trans, "%s: Read index for DMA queue txq id (%d), "
                          "index %d is out of range [0-%d] %d %d.\n", __func__,
                          txq_id, idx, q->n_bd, q->write_ptr, q->read_ptr);
                return;
@@ -875,9 +874,9 @@ static void iwl_hcmd_queue_reclaim(struct iwl_priv *priv, int txq_id, int idx)
             q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
 
                if (nfreed++ > 0) {
-                       IWL_ERR(priv, "HCMD skipped: index (%d) %d %d\n", idx,
+                       IWL_ERR(trans, "HCMD skipped: index (%d) %d %d\n", idx,
                                        q->write_ptr, q->read_ptr);
-                       iwlagn_fw_error(priv, false);
+                       iwlagn_fw_error(priv(trans), false);
                }
 
        }
@@ -891,7 +890,7 @@ static void iwl_hcmd_queue_reclaim(struct iwl_priv *priv, int txq_id, int idx)
  * will be executed.  The attached skb (if present) will only be freed
  * if the callback returns 1
  */
-void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
+void iwl_tx_cmd_complete(struct iwl_trans *trans, struct iwl_rx_mem_buffer *rxb)
 {
        struct iwl_rx_packet *pkt = rxb_addr(rxb);
        u16 sequence = le16_to_cpu(pkt->hdr.sequence);
@@ -900,7 +899,6 @@ void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
        int cmd_index;
        struct iwl_device_cmd *cmd;
        struct iwl_cmd_meta *meta;
-       struct iwl_trans *trans = trans(priv);
        struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
        struct iwl_tx_queue *txq = &trans_pcie->txq[trans->shrd->cmd_queue];
        unsigned long flags;
@@ -913,7 +911,7 @@ void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
                  txq_id, trans->shrd->cmd_queue, sequence,
                  trans_pcie->txq[trans->shrd->cmd_queue].q.read_ptr,
                  trans_pcie->txq[trans->shrd->cmd_queue].q.write_ptr)) {
-               iwl_print_hex_error(priv, pkt, 32);
+               iwl_print_hex_error(trans, pkt, 32);
                return;
        }
 
@@ -929,17 +927,17 @@ void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
                meta->source->reply_page = (unsigned long)rxb_addr(rxb);
                rxb->page = NULL;
        } else if (meta->callback)
-               meta->callback(priv, cmd, pkt);
+               meta->callback(trans->shrd, cmd, pkt);
 
        spin_lock_irqsave(&trans->hcmd_lock, flags);
 
-       iwl_hcmd_queue_reclaim(priv, txq_id, index);
+       iwl_hcmd_queue_reclaim(trans, txq_id, index);
 
        if (!(meta->flags & CMD_ASYNC)) {
                clear_bit(STATUS_HCMD_ACTIVE, &trans->shrd->status);
                IWL_DEBUG_INFO(trans, "Clearing HCMD_ACTIVE for command %s\n",
                               get_cmd_string(cmd->hdr.cmd));
-               wake_up_interruptible(&priv->wait_command_queue);
+               wake_up_interruptible(&trans->shrd->wait_command_queue);
        }
 
        meta->flags = 0;
@@ -1031,12 +1029,12 @@ const char *get_cmd_string(u8 cmd)
 
 #define HOST_COMPLETE_TIMEOUT (2 * HZ)
 
-static void iwl_generic_cmd_callback(struct iwl_priv *priv,
+static void iwl_generic_cmd_callback(struct iwl_shared *shrd,
                                     struct iwl_device_cmd *cmd,
                                     struct iwl_rx_packet *pkt)
 {
        if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
-               IWL_ERR(priv, "Bad return from %s (0x%08X)\n",
+               IWL_ERR(shrd->trans, "Bad return from %s (0x%08X)\n",
                        get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
                return;
        }
@@ -1045,11 +1043,11 @@ static void iwl_generic_cmd_callback(struct iwl_priv *priv,
        switch (cmd->hdr.cmd) {
        case REPLY_TX_LINK_QUALITY_CMD:
        case SENSITIVITY_CMD:
-               IWL_DEBUG_HC_DUMP(priv, "back from %s (0x%08X)\n",
+               IWL_DEBUG_HC_DUMP(shrd->trans, "back from %s (0x%08X)\n",
                                get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
                break;
        default:
-               IWL_DEBUG_HC(priv, "back from %s (0x%08X)\n",
+               IWL_DEBUG_HC(shrd->trans, "back from %s (0x%08X)\n",
                                get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
        }
 #endif
@@ -1107,7 +1105,7 @@ static int iwl_send_cmd_sync(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
                return ret;
        }
 
-       ret = wait_event_interruptible_timeout(priv(trans)->wait_command_queue,
+       ret = wait_event_interruptible_timeout(trans->shrd->wait_command_queue,
                        !test_bit(STATUS_HCMD_ACTIVE, &trans->shrd->status),
                        HOST_COMPLETE_TIMEOUT);
        if (!ret) {
index cec13ad..44e2f91 100644 (file)
@@ -604,9 +604,8 @@ error:
        return ret;
 }
 
-static void iwl_set_pwr_vmain(struct iwl_priv *priv)
+static void iwl_set_pwr_vmain(struct iwl_trans *trans)
 {
-       struct iwl_trans *trans = trans(priv);
 /*
  * (for documentation purposes)
  * to set power to V_AUX, do:
@@ -625,11 +624,10 @@ static void iwl_set_pwr_vmain(struct iwl_priv *priv)
 static int iwl_nic_init(struct iwl_trans *trans)
 {
        unsigned long flags;
-       struct iwl_priv *priv = priv(trans);
 
        /* nic_init */
        spin_lock_irqsave(&trans->shrd->lock, flags);
-       iwl_apm_init(priv);
+       iwl_apm_init(priv(trans));
 
        /* Set interrupt coalescing calibration timer to default (512 usecs) */
        iwl_write8(bus(trans), CSR_INT_COALESCING,
@@ -637,9 +635,9 @@ static int iwl_nic_init(struct iwl_trans *trans)
 
        spin_unlock_irqrestore(&trans->shrd->lock, flags);
 
-       iwl_set_pwr_vmain(priv);
+       iwl_set_pwr_vmain(trans);
 
-       priv->cfg->lib->nic_config(priv);
+       priv(trans)->cfg->lib->nic_config(priv(trans));
 
        /* Allocate the RX queue, or reset if it is already allocated */
        iwl_rx_init(trans);
@@ -764,7 +762,6 @@ static const u8 iwlagn_pan_ac_to_queue[] = {
 static int iwl_trans_pcie_start_device(struct iwl_trans *trans)
 {
        int ret;
-       struct iwl_priv *priv = priv(trans);
        struct iwl_trans_pcie *trans_pcie =
                IWL_TRANS_GET_PCIE_TRANS(trans);
 
@@ -792,7 +789,7 @@ static int iwl_trans_pcie_start_device(struct iwl_trans *trans)
                set_bit(STATUS_RF_KILL_HW, &trans->shrd->status);
 
        if (iwl_is_rfkill(trans->shrd)) {
-               wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
+               iwl_set_hw_rfkill_state(priv(trans), true);
                iwl_enable_interrupts(trans);
                return -ERFKILL;
        }
@@ -1397,7 +1394,7 @@ static int iwl_trans_pcie_resume(struct iwl_trans *trans)
        else
                clear_bit(STATUS_RF_KILL_HW, &trans->shrd->status);
 
-       wiphy_rfkill_set_hw_state(priv(trans)->hw->wiphy, hw_rfkill);
+       iwl_set_hw_rfkill_state(priv(trans), hw_rfkill);
 
        return 0;
 }
@@ -1674,7 +1671,6 @@ static ssize_t iwl_dbgfs_tx_queue_read(struct file *file,
 {
        struct iwl_trans *trans = file->private_data;
        struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
-       struct iwl_priv *priv = priv(trans);
        struct iwl_tx_queue *txq;
        struct iwl_queue *q;
        char *buf;
@@ -1684,7 +1680,7 @@ static ssize_t iwl_dbgfs_tx_queue_read(struct file *file,
        const size_t bufsz = sizeof(char) * 64 * hw_params(trans).max_txq_num;
 
        if (!trans_pcie->txq) {
-               IWL_ERR(priv, "txq not ready\n");
+               IWL_ERR(trans, "txq not ready\n");
                return -EAGAIN;
        }
        buf = kzalloc(bufsz, GFP_KERNEL);