From 410f2bb30d27252cc55a5f41668de60de62e5dc8 Mon Sep 17 00:00:00 2001 From: Stanislaw Gruszka Date: Fri, 4 Mar 2011 17:51:51 +0100 Subject: iwlwifi: avoid too frequent recover from statistics Usually H/W generate statistics notify once per about 100ms, but sometimes we can receive notify in shorter time, even 2 ms. This can be problem for plcp health and ack health checking. I.e. with 2 plcp errors happens randomly in 2 ms duration, we exceed plcp delta threshold equal to 100 (2*100/2). Also checking ack's in short time, can results not necessary false positive and firmware reset, for example when channel is noised and we do not receive ACKs frames or when remote device does not send ACKs at the moment. Patch change code to do statistic check and possible recovery only if 99ms elapsed from last check. Forced delay should assure we have good statistic data to estimate hardware state. Signed-off-by: Stanislaw Gruszka Acked-by: Wey-Yi Guy Signed-off-by: John W. Linville --- drivers/net/wireless/iwlwifi/iwl-dev.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/net/wireless/iwlwifi/iwl-dev.h') diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h index 58165c769cf1..6a41deba6863 100644 --- a/drivers/net/wireless/iwlwifi/iwl-dev.h +++ b/drivers/net/wireless/iwlwifi/iwl-dev.h @@ -1261,8 +1261,8 @@ struct iwl_priv { /* track IBSS manager (last beacon) status */ u32 ibss_manager; - /* storing the jiffies when the plcp error rate is received */ - unsigned long plcp_jiffies; + /* jiffies when last recovery from statistics was performed */ + unsigned long rx_statistics_jiffies; /* force reset */ struct iwl_force_reset force_reset[IWL_MAX_FORCE_RESET]; -- cgit v1.2.3