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iwlagn: leave notification waits on firmware errors 

When the firmware encounters an error while the
driver is waiting for a notification, it will
never get that notification. Therefore, instead
of timing out, bail out on errors when waiting
for notifications.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
This commit is contained in:
Johannes Berg 2011-04-13 03:14:49 -07:00 committed by Wey-Yi Guy
parent a8674a1efc
commit e74fe2330a
3 changed files with 21 additions and 2 deletions
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6
drivers/net/wireless/iwlwifi/iwl-agn-lib.c
View File

@ -2266,6 +2266,7 @@ void iwlagn_init_notification_wait(struct iwl_priv *priv,
wait_entry->fn_data = fn_data;
wait_entry->cmd = cmd;
wait_entry->triggered = false;
wait_entry->aborted = false;
spin_lock_bh(&priv->_agn.notif_wait_lock);
list_add(&wait_entry->list, &priv->_agn.notif_waits);
@ -2279,13 +2280,16 @@ int iwlagn_wait_notification(struct iwl_priv *priv,
int ret;
ret = wait_event_timeout(priv->_agn.notif_waitq,
wait_entry->triggered,
wait_entry->triggered || wait_entry->aborted,
timeout);
spin_lock_bh(&priv->_agn.notif_wait_lock);
list_del(&wait_entry->list);
spin_unlock_bh(&priv->_agn.notif_wait_lock);
if (wait_entry->aborted)
return -EIO;
/* return value is always >= 0 */
if (ret <= 0)
return -ETIMEDOUT;

15
drivers/net/wireless/iwlwifi/iwl-core.c
View File

@ -867,6 +867,19 @@ void iwl_print_rx_config_cmd(struct iwl_priv *priv,
}
#endif
static void iwlagn_abort_notification_waits(struct iwl_priv *priv)
{
unsigned long flags;
struct iwl_notification_wait *wait_entry;
spin_lock_irqsave(&priv->_agn.notif_wait_lock, flags);
list_for_each_entry(wait_entry, &priv->_agn.notif_waits, list)
wait_entry->aborted = true;
spin_unlock_irqrestore(&priv->_agn.notif_wait_lock, flags);
wake_up_all(&priv->_agn.notif_waitq);
}
void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
{
unsigned int reload_msec;
@ -878,6 +891,8 @@ void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
/* Cancel currently queued command. */
clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
iwlagn_abort_notification_waits(priv);
/* Keep the restart process from trying to send host
* commands by clearing the ready bit */
clear_bit(STATUS_READY, &priv->status);

2
drivers/net/wireless/iwlwifi/iwl-dev.h
View File

@ -1110,7 +1110,7 @@ struct iwl_notification_wait {
void *fn_data;
u8 cmd;
bool triggered;
bool triggered, aborted;
};
enum iwl_rxon_context_id {