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iwlwifi: separated time check for different type of force reset

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Use different timing duration check for different type of force reset,
force reset request can come from different source and based on
different reason; one type of reset request should not block other type of
reset request.

Adding structure to keep track of different force reset request.

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>
This commit is contained in:
Wey-Yi Guy 2010-02-18 22:03:06 -08:00 committed by John W. Linville
parent d5755939e8
commit 8a472da431
3 changed files with 33 additions and 12 deletions
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6
drivers/net/wireless/iwlwifi/iwl-agn.c
View File

@ -3378,6 +3378,12 @@ static int iwl_init_drv(struct iwl_priv *priv)
priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
priv->agg_tids_count = 0;
/* initialize force reset */
priv->force_reset[IWL_RF_RESET].reset_duration =
IWL_DELAY_NEXT_FORCE_RF_RESET;
priv->force_reset[IWL_FW_RESET].reset_duration =
IWL_DELAY_NEXT_FORCE_FW_RELOAD;
/* Choose which receivers/antennas to use */
if (priv->cfg->ops->hcmd->set_rxon_chain)
priv->cfg->ops->hcmd->set_rxon_chain(priv);

25
drivers/net/wireless/iwlwifi/iwl-core.c
View File

@ -3357,22 +3357,30 @@ static void iwl_force_rf_reset(struct iwl_priv *priv)
return;
}
#define IWL_DELAY_NEXT_FORCE_RESET (HZ*3)
int iwl_force_reset(struct iwl_priv *priv, int mode)
{
struct iwl_force_reset *force_reset;
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return -EINVAL;
if (priv->last_force_reset_jiffies &&
time_after(priv->last_force_reset_jiffies +
IWL_DELAY_NEXT_FORCE_RESET, jiffies)) {
if (mode >= IWL_MAX_FORCE_RESET) {
IWL_DEBUG_INFO(priv, "invalid reset request.\n");
return -EINVAL;
}
force_reset = &priv->force_reset[mode];
force_reset->reset_request_count++;
if (force_reset->last_force_reset_jiffies &&
time_after(force_reset->last_force_reset_jiffies +
force_reset->reset_duration, jiffies)) {
IWL_DEBUG_INFO(priv, "force reset rejected\n");
force_reset->reset_reject_count++;
return -EAGAIN;
}
force_reset->reset_success_count++;
force_reset->last_force_reset_jiffies = jiffies;
IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
switch (mode) {
case IWL_RF_RESET:
iwl_force_rf_reset(priv);
@ -3389,12 +3397,7 @@ int iwl_force_reset(struct iwl_priv *priv, int mode)
clear_bit(STATUS_READY, &priv->status);
queue_work(priv->workqueue, &priv->restart);
break;
default:
IWL_DEBUG_INFO(priv, "invalid reset request.\n");
return -EINVAL;
}
priv->last_force_reset_jiffies = jiffies;
return 0;
}

14
drivers/net/wireless/iwlwifi/iwl-dev.h
View File

@ -1036,9 +1036,21 @@ struct iwl_event_log {
#define IWL_MAX_PLCP_ERR_EXT_LONG_THRESHOLD_DEF (200)
#define IWL_MAX_PLCP_ERR_THRESHOLD_MAX (255)
#define IWL_DELAY_NEXT_FORCE_RF_RESET (HZ*3)
#define IWL_DELAY_NEXT_FORCE_FW_RELOAD (HZ*5)
enum iwl_reset {
IWL_RF_RESET = 0,
IWL_FW_RESET,
IWL_MAX_FORCE_RESET,
};
struct iwl_force_reset {
int reset_request_count;
int reset_success_count;
int reset_reject_count;
unsigned long reset_duration;
unsigned long last_force_reset_jiffies;
};
struct iwl_priv {
@ -1076,7 +1088,7 @@ struct iwl_priv {
u8 agg_tids_count;
/* force reset */
unsigned long last_force_reset_jiffies;
struct iwl_force_reset force_reset[IWL_MAX_FORCE_RESET];
/* we allocate array of iwl4965_channel_info for NIC's valid channels.
* Access via channel # using indirect index array */