iwlagn: add module parameter to disable stuck queue watchdog timer

Add the parameter to disable stuck queue watchdog timer, different platforms
might have different timing. Provide the option to disable the timer to prevent
un-necessary firmware reload.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

drivers/net/wireless/iwlwifi/iwl-agn.c

@@ -3820,6 +3820,10 @@ MODULE_PARM_DESC(plcp_check, "Check plcp health (default: 1 [enabled])");
 module_param_named(ack_check, iwlagn_mod_params.ack_check, bool, S_IRUGO);
 MODULE_PARM_DESC(ack_check, "Check ack health (default: 0 [disabled])");
 
+module_param_named(wd_disable, iwlagn_mod_params.wd_disable, bool, S_IRUGO);
+MODULE_PARM_DESC(wd_disable,
+		"Disable stuck queue watchdog timer (default: 0 [enabled])");
+
 /*
  * set bt_coex_active to true, uCode will do kill/defer
  * every time the priority line is asserted (BT is sending signals on the

drivers/net/wireless/iwlwifi/iwl-core.c

@@ -1853,7 +1853,7 @@ void iwl_setup_watchdog(struct iwl_priv *priv)
 {
 	unsigned int timeout = priv->cfg->base_params->wd_timeout;
 
-	if (timeout)
+	if (timeout && !iwlagn_mod_params.wd_disable)
 		mod_timer(&priv->watchdog,
 			  jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout)));
 	else

drivers/net/wireless/iwlwifi/iwl-core.h

@@ -160,6 +160,7 @@ struct iwl_mod_params {
 	int restart_fw;		/* def: 1 = restart firmware */
 	bool plcp_check;	/* def: true = enable plcp health check */
 	bool ack_check;		/* def: false = disable ack health check */
+	bool wd_disable;	/* def: false = enable stuck queue check */
 	bool bt_coex_active;	/* def: true = enable bt coex */
 	int led_mode;		/* def: 0 = system default */
 	bool no_sleep_autoadjust; /* def: true = disable autoadjust */