iwlwifi: move queue watchdog into transport

This removes one of the two sources of device
restarts in the upper layer -- those are a bit
inconvenient because normal restarts originate
in the transport. By moving the watchdog down
it can be treated the same.

Also rewrite the watchdog logic. Timers are
much more efficient when they never fire, so
instead firing a timer every 500ms set up a
timer for each TX queue and fire it only when
the queue is really stuck. This avoids the CPU
waking up when everything is working well.

While at it, remove the wd_disable config item
and replace it by simply setting wd_timeout to
IWL_WATCHHDOG_DISABLED (0).

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h
index 99be58940e27..780bcf3f6ff1 100644
--- a/drivers/net/wireless/iwlwifi/iwl-dev.h
+++ b/drivers/net/wireless/iwlwifi/iwl-dev.h
@@ -585,6 +585,7 @@ struct iwl_event_log {
 #define IWL_DELAY_NEXT_FORCE_FW_RELOAD (HZ*5)
 
 /* TX queue watchdog timeouts in mSecs */
+#define IWL_WATCHHDOG_DISABLED	(0)
 #define IWL_DEF_WD_TIMEOUT	(2000)
 #define IWL_LONG_WD_TIMEOUT	(10000)
 #define IWL_MAX_WD_TIMEOUT	(120000)
@@ -973,7 +974,6 @@ struct iwl_priv {
 	struct work_struct run_time_calib_work;
 	struct timer_list statistics_periodic;
 	struct timer_list ucode_trace;
-	struct timer_list watchdog;
 
 	struct iwl_event_log event_log;