diff options
| -rw-r--r-- | drivers/net/wireless/iwlwifi/mvm/mac80211.c | 86 |
1 files changed, 51 insertions, 35 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c index 5219b3a5689d..46ff7cd52d92 100644 --- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c +++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c @@ -1718,6 +1718,47 @@ static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw, iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED); } +static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm, + enum iwl_scan_status scan_type) +{ + int ret; + bool wait_for_handlers = false; + + mutex_lock(&mvm->mutex); + + if (mvm->scan_status != scan_type) { + ret = 0; + /* make sure there are no pending notifications */ + wait_for_handlers = true; + goto out; + } + + switch (scan_type) { + case IWL_MVM_SCAN_SCHED: + ret = iwl_mvm_scan_offload_stop(mvm, true); + break; + case IWL_MVM_SCAN_OS: + ret = iwl_mvm_cancel_scan(mvm); + break; + case IWL_MVM_SCAN_NONE: + default: + WARN_ON_ONCE(1); + ret = -EINVAL; + break; + } + if (ret) + goto out; + + wait_for_handlers = true; +out: + mutex_unlock(&mvm->mutex); + + /* make sure we consume the completion notification */ + if (wait_for_handlers) + iwl_mvm_wait_for_async_handlers(mvm); + + return ret; +} static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_scan_request *hw_req) @@ -1730,19 +1771,13 @@ static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw, req->n_channels > mvm->fw->ucode_capa.n_scan_channels) return -EINVAL; + ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED); + if (ret) + return ret; + mutex_lock(&mvm->mutex); - switch (mvm->scan_status) { - case IWL_MVM_SCAN_SCHED: - ret = iwl_mvm_scan_offload_stop(mvm, true); - if (ret) { - ret = -EBUSY; - goto out; - } - break; - case IWL_MVM_SCAN_NONE: - break; - default: + if (mvm->scan_status != IWL_MVM_SCAN_NONE) { ret = -EBUSY; goto out; } @@ -1758,8 +1793,6 @@ static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw, iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); out: mutex_unlock(&mvm->mutex); - /* make sure to flush the Rx handler before the next scan arrives */ - iwl_mvm_wait_for_async_handlers(mvm); return ret; } @@ -2135,6 +2168,10 @@ static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw, struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); int ret; + ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS); + if (ret) + return ret; + mutex_lock(&mvm->mutex); if (!iwl_mvm_is_idle(mvm)) { @@ -2142,26 +2179,7 @@ static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw, goto out; } - switch (mvm->scan_status) { - case IWL_MVM_SCAN_OS: - IWL_DEBUG_SCAN(mvm, "Stopping previous scan for sched_scan\n"); - ret = iwl_mvm_cancel_scan(mvm); - if (ret) { - ret = -EBUSY; - goto out; - } - - /* - * iwl_mvm_rx_scan_complete() will be called soon but will - * not reset the scan status as it won't be IWL_MVM_SCAN_OS - * any more since we queue the next scan immediately (below). - * We make sure it is called before the next scan starts by - * flushing the async-handlers work. - */ - break; - case IWL_MVM_SCAN_NONE: - break; - default: + if (mvm->scan_status != IWL_MVM_SCAN_NONE) { ret = -EBUSY; goto out; } @@ -2189,8 +2207,6 @@ err: mvm->scan_status = IWL_MVM_SCAN_NONE; out: mutex_unlock(&mvm->mutex); - /* make sure to flush the Rx handler before the next scan arrives */ - iwl_mvm_wait_for_async_handlers(mvm); return ret; } |