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iwlwifi: mvm: add D0i3 ref/unref for scan 

Take a reference when starting to scan and release it on completion.
Note that if the scan is cancelled/aborted, a completion will still be
sent up.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Eliad Peller <eliadx.peller@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Arik Nemtsov 2013-10-17 17:51:35 +03:00 committed by Emmanuel Grumbach
parent 7498cf4ceb
commit 519e202649
3 changed files with 13 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/net/wireless/iwlwifi/mvm/mac80211.c
View File

@ -1442,11 +1442,17 @@ static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
mutex_lock(&mvm->mutex);
if (mvm->scan_status == IWL_MVM_SCAN_NONE)
ret = iwl_mvm_scan_request(mvm, vif, req);
else
if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
ret = -EBUSY;
goto out;
}
iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
ret = iwl_mvm_scan_request(mvm, vif, req);
if (ret)
iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
out:
mutex_unlock(&mvm->mutex);
return ret;

1
drivers/net/wireless/iwlwifi/mvm/mvm.h
View File

@ -241,6 +241,7 @@ enum iwl_mvm_smps_type_request {
enum iwl_mvm_ref_type {
IWL_MVM_REF_UCODE_DOWN,
IWL_MVM_REF_SCAN,
IWL_MVM_REF_COUNT,
};

3
drivers/net/wireless/iwlwifi/mvm/scan.c
View File

@ -407,6 +407,8 @@ int iwl_mvm_rx_scan_complete(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
mvm->scan_status = IWL_MVM_SCAN_NONE;
ieee80211_scan_completed(mvm->hw, notif->status != SCAN_COMP_STATUS_OK);
iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
return 0;
}
@ -475,6 +477,7 @@ void iwl_mvm_cancel_scan(struct iwl_mvm *mvm)
if (iwl_mvm_is_radio_killed(mvm)) {
ieee80211_scan_completed(mvm->hw, true);
iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
mvm->scan_status = IWL_MVM_SCAN_NONE;
return;
}