iwlwifi: reset led_tpt when clear tx/rx traffic byte counts

LED blink rate is based on the traffic load, when tx/rx traffic counts
got reset, we also need to reset the led_tpt to prevent incorrect
blink rate being calculated.

Merge both clear_tx_statistics() and clear_rx_statistics() into
single clear_traffic_statistics() function, when reset the traffic byte
counts, both tx and rx need to be reset at the same time, to make
sure calculated the correct led blink rate.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

4 files changed, 18 insertions, 38 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c
index dbe41cf8943c..c2263180614e 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.c
+++ b/drivers/net/wireless/iwlwifi/iwl-core.c
@@ -3079,15 +3079,11 @@ const char *get_ctrl_string(int cmd)
         }
 }
 
-void iwl_clear_tx_stats(struct iwl_priv *priv)
+void iwl_clear_traffic_stats(struct iwl_priv *priv)
 {
         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
-
-}
-
-void iwl_clear_rx_stats(struct iwl_priv *priv)
-{
         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
+        priv->led_tpt = 0;
 }
 
 /*
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h
index 334da64d968d..0779158fed2f 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.h
+++ b/drivers/net/wireless/iwlwifi/iwl-core.h
@@ -353,8 +353,7 @@ void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
                                 u16 length, struct ieee80211_hdr *header);
 const char *get_mgmt_string(int cmd);
 const char *get_ctrl_string(int cmd);
-void iwl_clear_tx_stats(struct iwl_priv *priv);
-void iwl_clear_rx_stats(struct iwl_priv *priv);
+void iwl_clear_traffic_stats(struct iwl_priv *priv);
 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc,
                       u16 len);
 #else
diff --git a/drivers/net/wireless/iwlwifi/iwl-debug.h b/drivers/net/wireless/iwlwifi/iwl-debug.h
index 25a0e73314f7..d61293ab67c9 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debug.h
+++ b/drivers/net/wireless/iwlwifi/iwl-debug.h
@@ -107,7 +107,8 @@ struct iwl_debugfs {
                 struct dentry *file_chain_noise;
                 struct dentry *file_tx_power;
                 struct dentry *file_power_save_status;
-                struct dentry *file_clear_statistics;
+                struct dentry *file_clear_ucode_statistics;
+                struct dentry *file_clear_traffic_statistics;
         } dbgfs_debug_files;
         u32 sram_offset;
         u32 sram_len;
diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index 9a5ca25d72c3..b8f9edc3d998 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -160,7 +160,7 @@ static ssize_t iwl_dbgfs_tx_statistics_read(struct file *file,
         return ret;
 }
 
-static ssize_t iwl_dbgfs_tx_statistics_write(struct file *file,
+static ssize_t iwl_dbgfs_clear_traffic_statistics_write(struct file *file,
                                         const char __user *user_buf,
                                         size_t count, loff_t *ppos)
 {
@@ -175,8 +175,7 @@ static ssize_t iwl_dbgfs_tx_statistics_write(struct file *file,
                 return -EFAULT;
         if (sscanf(buf, "%x", &clear_flag) != 1)
                 return -EFAULT;
-        if (clear_flag == 1)
-                iwl_clear_tx_stats(priv);
+        iwl_clear_traffic_stats(priv);
 
         return count;
 }
@@ -221,26 +220,6 @@ static ssize_t iwl_dbgfs_rx_statistics_read(struct file *file,
         return ret;
 }
 
-static ssize_t iwl_dbgfs_rx_statistics_write(struct file *file,
-                                        const char __user *user_buf,
-                                        size_t count, loff_t *ppos)
-{
-        struct iwl_priv *priv = file->private_data;
-        u32 clear_flag;
-        char buf[8];
-        int buf_size;
-
-        memset(buf, 0, sizeof(buf));
-        buf_size = min(count, sizeof(buf) -  1);
-        if (copy_from_user(buf, user_buf, buf_size))
-                return -EFAULT;
-        if (sscanf(buf, "%x", &clear_flag) != 1)
-                return -EFAULT;
-        if (clear_flag == 1)
-                iwl_clear_rx_stats(priv);
-        return count;
-}
-
 #define BYTE1_MASK 0x000000ff;
 #define BYTE2_MASK 0x0000ffff;
 #define BYTE3_MASK 0x00ffffff;
@@ -1823,7 +1802,7 @@ static ssize_t iwl_dbgfs_power_save_status_read(struct file *file,
         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 }
 
-static ssize_t iwl_dbgfs_clear_statistics_write(struct file *file,
+static ssize_t iwl_dbgfs_clear_ucode_statistics_write(struct file *file,
                                          const char __user *user_buf,
                                          size_t count, loff_t *ppos)
 {
@@ -1847,8 +1826,8 @@ static ssize_t iwl_dbgfs_clear_statistics_write(struct file *file,
         return count;
 }
 
-DEBUGFS_READ_WRITE_FILE_OPS(rx_statistics);
-DEBUGFS_READ_WRITE_FILE_OPS(tx_statistics);
+DEBUGFS_READ_FILE_OPS(rx_statistics);
+DEBUGFS_READ_FILE_OPS(tx_statistics);
 DEBUGFS_READ_WRITE_FILE_OPS(traffic_log);
 DEBUGFS_READ_FILE_OPS(rx_queue);
 DEBUGFS_READ_FILE_OPS(tx_queue);
@@ -1859,7 +1838,8 @@ DEBUGFS_READ_FILE_OPS(sensitivity);
 DEBUGFS_READ_FILE_OPS(chain_noise);
 DEBUGFS_READ_FILE_OPS(tx_power);
 DEBUGFS_READ_FILE_OPS(power_save_status);
-DEBUGFS_WRITE_FILE_OPS(clear_statistics);
+DEBUGFS_WRITE_FILE_OPS(clear_ucode_statistics);
+DEBUGFS_WRITE_FILE_OPS(clear_traffic_statistics);
 
 /*
  * Create the debugfs files and directories
@@ -1908,7 +1888,8 @@ int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
         DEBUGFS_ADD_FILE(tx_queue, debug);
         DEBUGFS_ADD_FILE(tx_power, debug);
         DEBUGFS_ADD_FILE(power_save_status, debug);
-        DEBUGFS_ADD_FILE(clear_statistics, debug);
+        DEBUGFS_ADD_FILE(clear_ucode_statistics, debug);
+        DEBUGFS_ADD_FILE(clear_traffic_statistics, debug);
         if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) != CSR_HW_REV_TYPE_3945) {
                 DEBUGFS_ADD_FILE(ucode_rx_stats, debug);
                 DEBUGFS_ADD_FILE(ucode_tx_stats, debug);
@@ -1962,7 +1943,10 @@ void iwl_dbgfs_unregister(struct iwl_priv *priv)
         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_tx_queue);
         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_tx_power);
         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_power_save_status);
-        DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_clear_statistics);
+        DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.
+                        file_clear_ucode_statistics);
+        DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.
+                        file_clear_traffic_statistics);
         if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) != CSR_HW_REV_TYPE_3945) {
                 DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.
                         file_ucode_rx_stats);