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iwlagn: add "echo" test when command queue stuck

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When detect command queue stuck, instead of reload the firmware
do the "echo" test to make sure it is really stuck before reload

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Wey-Yi Guy 2011-10-10 07:26:49 -07:00 committed by John W. Linville
parent 05c89b917d
commit 317d09f769
2 changed files with 23 additions and 1 deletions
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23
drivers/net/wireless/iwlwifi/iwl-core.c
View File

@ -1732,10 +1732,31 @@ int iwl_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
return err;
}
int iwl_cmd_echo_test(struct iwl_priv *priv)
{
struct iwl_host_cmd cmd = {
.id = REPLY_ECHO,
.flags = CMD_SYNC,
};
return iwl_trans_send_cmd(trans(priv), &cmd);
}
static inline int iwl_check_stuck_queue(struct iwl_priv *priv, int txq)
{
if (iwl_trans_check_stuck_queue(trans(priv), txq)) {
int ret = iwl_force_reset(priv, IWL_FW_RESET, false);
int ret;
if (txq == priv->shrd->cmd_queue) {
/*
* validate command queue still working
* by sending "ECHO" command
*/
if (!iwl_cmd_echo_test(priv))
return 0;
else
IWL_DEBUG_HC(priv, "echo testing fail\n");
}
ret = iwl_force_reset(priv, IWL_FW_RESET, false);
return (ret == -EAGAIN) ? 0 : 1;
}
return 0;

1
drivers/net/wireless/iwlwifi/iwl-core.h
View File

@ -266,6 +266,7 @@ void iwl_mac_remove_interface(struct ieee80211_hw *hw,
int iwl_mac_change_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
enum nl80211_iftype newtype, bool newp2p);
int iwl_cmd_echo_test(struct iwl_priv *priv);
#ifdef CONFIG_IWLWIFI_DEBUGFS
int iwl_alloc_traffic_mem(struct iwl_priv *priv);
void iwl_free_traffic_mem(struct iwl_priv *priv);