iwlwifi: mvm: add support for negative temperatures

The driver should support also negative temperatures.
So there is a need to separate between the return value and
temperature in order to be able to distinguish between
a negative temperature and error value.

Signed-off-by: Chaya Rachel Ivgi <chaya.rachel.ivgi@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
index 8059efa..5c0f939 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
@@ -261,17 +261,18 @@ static ssize_t iwl_dbgfs_nic_temp_read(struct file *file,
 {
        struct iwl_mvm *mvm = file->private_data;
        char buf[16];
-       int pos, temp;
+       int pos, ret;
+       s32 temp;
 
        if (!mvm->ucode_loaded)
                return -EIO;
 
        mutex_lock(&mvm->mutex);
-       temp = iwl_mvm_get_temp(mvm);
+       ret = iwl_mvm_get_temp(mvm, &temp);
        mutex_unlock(&mvm->mutex);
 
-       if (temp < 0)
-               return temp;
+       if (ret)
+               return -EIO;
 
        pos = scnprintf(buf , sizeof(buf), "%d\n", temp);
 

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
index 5a92ab1..216c8d6 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
@@ -1489,7 +1489,7 @@ void iwl_mvm_tt_handler(struct iwl_mvm *mvm);
 void iwl_mvm_tt_initialize(struct iwl_mvm *mvm, u32 min_backoff);
 void iwl_mvm_tt_exit(struct iwl_mvm *mvm);
 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state);
-int iwl_mvm_get_temp(struct iwl_mvm *mvm);
+int iwl_mvm_get_temp(struct iwl_mvm *mvm, s32 *temp);
 
 /* Location Aware Regulatory */
 struct iwl_mcc_update_resp *

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tt.c b/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
index fb76004..758d05a 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
@@ -194,12 +194,12 @@ static int iwl_mvm_get_temp_cmd(struct iwl_mvm *mvm)
        return iwl_mvm_send_cmd_pdu(mvm, cmdid, 0, sizeof(extcmd), &extcmd);
 }
 
-int iwl_mvm_get_temp(struct iwl_mvm *mvm)
+int iwl_mvm_get_temp(struct iwl_mvm *mvm, s32 *temp)
 {
        struct iwl_notification_wait wait_temp_notif;
        static u16 temp_notif[] = { WIDE_ID(PHY_OPS_GROUP,
                                            DTS_MEASUREMENT_NOTIF_WIDE) };
-       int ret, temp;
+       int ret;
 
        if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_WIDE_CMD_HDR))
                temp_notif[0] = DTS_MEASUREMENT_NOTIFICATION;
@@ -208,7 +208,7 @@ int iwl_mvm_get_temp(struct iwl_mvm *mvm)
 
        iwl_init_notification_wait(&mvm->notif_wait, &wait_temp_notif,
                                   temp_notif, ARRAY_SIZE(temp_notif),
-                                  iwl_mvm_temp_notif_wait, &temp);
+                                  iwl_mvm_temp_notif_wait, temp);
 
        ret = iwl_mvm_get_temp_cmd(mvm);
        if (ret) {
@@ -219,12 +219,10 @@ int iwl_mvm_get_temp(struct iwl_mvm *mvm)
 
        ret = iwl_wait_notification(&mvm->notif_wait, &wait_temp_notif,
                                    IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT);
-       if (ret) {
+       if (ret)
                IWL_ERR(mvm, "Getting the temperature timed out\n");
-               return ret;
-       }
 
-       return temp;
+       return ret;
 }
 
 static void check_exit_ctkill(struct work_struct *work)
@@ -233,6 +231,7 @@ static void check_exit_ctkill(struct work_struct *work)
        struct iwl_mvm *mvm;
        u32 duration;
        s32 temp;
+       int ret;
 
        tt = container_of(work, struct iwl_mvm_tt_mgmt, ct_kill_exit.work);
        mvm = container_of(tt, struct iwl_mvm, thermal_throttle);
@@ -250,13 +249,13 @@ static void check_exit_ctkill(struct work_struct *work)
                goto reschedule;
        }
 
-       temp = iwl_mvm_get_temp(mvm);
+       ret = iwl_mvm_get_temp(mvm, &temp);
 
        iwl_mvm_unref(mvm, IWL_MVM_REF_CHECK_CTKILL);
 
        __iwl_mvm_mac_stop(mvm);
 
-       if (temp < 0)
+       if (ret)
                goto reschedule;
 
        IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", temp);