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iwlwifi: mvm: use atomic interface iteration to avoid deadlock 

Using the non-atomic version creates a dependency between
mac80211's iflist_mtx and mvm->mutex. Use the atomic version
instead which doesn't take iflist_mtx but can't sleep, so
send the HCMD in ASYNC.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Emmanuel Grumbach 2013-02-11 15:56:01 +02:00 committed by Johannes Berg
parent a3777e0fdd
commit 5360cfb2bc
2 changed files with 2 additions and 2 deletions
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2
drivers/net/wireless/iwlwifi/mvm/mac80211.c
View File

@ -475,7 +475,7 @@ static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
if (mvm->vif_count > 1) {
IWL_DEBUG_MAC80211(mvm,
"Disable power on existing interfaces\n");
ieee80211_iterate_active_interfaces(
ieee80211_iterate_active_interfaces_atomic(
mvm->hw,
IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_pm_disable_iterator, mvm);

2
drivers/net/wireless/iwlwifi/mvm/power.c
View File

@ -194,7 +194,7 @@ int iwl_mvm_power_disable(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
cmd.id_and_color, iwlmvm_mod_params.power_scheme,
le16_to_cpu(cmd.flags));
return iwl_mvm_send_cmd_pdu(mvm, POWER_TABLE_CMD, CMD_SYNC,
return iwl_mvm_send_cmd_pdu(mvm, POWER_TABLE_CMD, CMD_ASYNC,
sizeof(cmd), &cmd);
}