iwlwifi: add debugfs to control stuck queue timer
In current implementation, stuck queue timer is fixed to 1 second. Add
debugfs file to modify the timer to enhance the flexibility:
Set the monitor_period as following:
0: disable stuck queue force reset function
1 - 60000: monitor period (1 - 60 second)
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index d3acdae..aae9eb5 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -1527,6 +1527,34 @@
user_buf, count, ppos);
}
+static ssize_t iwl_dbgfs_monitor_period_write(struct file *file,
+ const char __user *user_buf,
+ size_t count, loff_t *ppos) {
+
+ struct iwl_priv *priv = file->private_data;
+ char buf[8];
+ int buf_size;
+ int period;
+
+ 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, "%d", &period) != 1)
+ return -EINVAL;
+ if (period < 0 || period > IWL_MAX_MONITORING_PERIOD)
+ priv->cfg->monitor_recover_period = IWL_DEF_MONITORING_PERIOD;
+ else
+ priv->cfg->monitor_recover_period = period;
+
+ if (priv->cfg->monitor_recover_period)
+ mod_timer(&priv->monitor_recover, jiffies + msecs_to_jiffies(
+ priv->cfg->monitor_recover_period));
+ else
+ del_timer_sync(&priv->monitor_recover);
+ return count;
+}
+
DEBUGFS_READ_FILE_OPS(rx_statistics);
DEBUGFS_READ_FILE_OPS(tx_statistics);
DEBUGFS_READ_WRITE_FILE_OPS(traffic_log);
@@ -1550,6 +1578,7 @@
DEBUGFS_READ_FILE_OPS(rxon_filter_flags);
DEBUGFS_WRITE_FILE_OPS(txfifo_flush);
DEBUGFS_READ_FILE_OPS(ucode_bt_stats);
+DEBUGFS_WRITE_FILE_OPS(monitor_period);
/*
* Create the debugfs files and directories
@@ -1621,6 +1650,7 @@
DEBUGFS_ADD_FILE(ucode_bt_stats, dir_debug, S_IRUSR);
DEBUGFS_ADD_FILE(rxon_flags, dir_debug, S_IWUSR);
DEBUGFS_ADD_FILE(rxon_filter_flags, dir_debug, S_IWUSR);
+ DEBUGFS_ADD_FILE(monitor_period, dir_debug, S_IWUSR);
if (priv->cfg->sensitivity_calib_by_driver)
DEBUGFS_ADD_BOOL(disable_sensitivity, dir_rf,
&priv->disable_sens_cal);