iwlwifi: mvm: BT Coex - allocate a short command on the stack

The BT_CONFIG command used to be very long, hence it was
allocated on the heap in the previous API. In the new API,
this command is much smaller, and can now safely be
allocated on the stack.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/iwlwifi/mvm/coex.c b/drivers/net/wireless/iwlwifi/mvm/coex.c
index 03dab95ab051648bef0fb35c83da9df4f15d2bee..a9908865b66094e2ed0b5f1a340486b7592a6a31 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/coex.c
+++ b/drivers/net/wireless/iwlwifi/mvm/coex.c
@@ -6,7 +6,7 @@
  * GPL LICENSE SUMMARY
  *
  * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved.
- * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
+ * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
@@ -32,7 +32,7 @@
  * BSD LICENSE
  *
  * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved.
- * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
+ * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -408,23 +408,12 @@ iwl_get_coex_type(struct iwl_mvm *mvm, const struct ieee80211_vif *vif)
 
 int iwl_send_bt_init_conf(struct iwl_mvm *mvm)
 {
-       struct iwl_bt_coex_cmd *bt_cmd;
-       struct iwl_host_cmd cmd = {
-               .id = BT_CONFIG,
-               .len = { sizeof(*bt_cmd), },
-               .dataflags = { IWL_HCMD_DFL_NOCOPY, },
-       };
-       int ret;
+       struct iwl_bt_coex_cmd bt_cmd = {};
        u32 mode;
 
        if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_BT_COEX_SPLIT))
                return iwl_send_bt_init_conf_old(mvm);
 
-       bt_cmd = kzalloc(sizeof(*bt_cmd), GFP_KERNEL);
-       if (!bt_cmd)
-               return -ENOMEM;
-       cmd.data[0] = bt_cmd;
-
        lockdep_assert_held(&mvm->mutex);
 
        if (unlikely(mvm->bt_force_ant_mode != BT_FORCE_ANT_DIS)) {
@@ -440,36 +429,33 @@ int iwl_send_bt_init_conf(struct iwl_mvm *mvm)
                        mode = 0;
                }
 
-               bt_cmd->mode = cpu_to_le32(mode);
+               bt_cmd.mode = cpu_to_le32(mode);
                goto send_cmd;
        }
 
        mode = iwlwifi_mod_params.bt_coex_active ? BT_COEX_NW : BT_COEX_DISABLE;
-       bt_cmd->mode = cpu_to_le32(mode);
+       bt_cmd.mode = cpu_to_le32(mode);
 
        if (IWL_MVM_BT_COEX_SYNC2SCO)
-               bt_cmd->enabled_modules |=
+               bt_cmd.enabled_modules |=
                        cpu_to_le32(BT_COEX_SYNC2SCO_ENABLED);
 
        if (iwl_mvm_bt_is_plcr_supported(mvm))
-               bt_cmd->enabled_modules |= cpu_to_le32(BT_COEX_CORUN_ENABLED);
+               bt_cmd.enabled_modules |= cpu_to_le32(BT_COEX_CORUN_ENABLED);
 
        if (IWL_MVM_BT_COEX_MPLUT) {
-               bt_cmd->enabled_modules |= cpu_to_le32(BT_COEX_MPLUT_ENABLED);
-               bt_cmd->enabled_modules |=
+               bt_cmd.enabled_modules |= cpu_to_le32(BT_COEX_MPLUT_ENABLED);
+               bt_cmd.enabled_modules |=
                        cpu_to_le32(BT_COEX_MPLUT_BOOST_ENABLED);
        }
 
-       bt_cmd->enabled_modules |= cpu_to_le32(BT_COEX_HIGH_BAND_RET);
+       bt_cmd.enabled_modules |= cpu_to_le32(BT_COEX_HIGH_BAND_RET);
 
 send_cmd:
        memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
        memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
 
-       ret = iwl_mvm_send_cmd(mvm, &cmd);
-
-       kfree(bt_cmd);
-       return ret;
+       return iwl_mvm_send_cmd_pdu(mvm, BT_CONFIG, 0, sizeof(bt_cmd), &bt_cmd);
 }
 
 static int iwl_mvm_bt_coex_reduced_txp(struct iwl_mvm *mvm, u8 sta_id,