diff options
| author | Luca Coelho <luciano.coelho@intel.com> | 2016-03-11 10:20:37 +0300 |
|---|---|---|
| committer | Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2016-03-30 16:24:48 +0300 |
| commit | 728e825f81b1fe29eb177148fcabfa55a7f4c1bb (patch) | |
| tree | 487b5ba41dd509dcbd0c3b7036086cf4bfa52bb6 /drivers/net/wireless/intel/iwlwifi/mvm/scan.c | |
| parent | 097129c9e62540122b63cba79c1843a2602bec37 (diff) | |
| download | linux-728e825f81b1fe29eb177148fcabfa55a7f4c1bb.tar.xz | |
iwlwifi: mvm: add a scan timeout for regular scans
If something goes wrong with the firmware and we never get a scan
complete notification, we stay stuck forever. In order to avoid this
situation, add a timeout and trigger an NMI if it expires before
receiving the notification., so we can clean things up.
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/mvm/scan.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/scan.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/scan.c b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c index 25b007cf7db7..c1d1be9c5d01 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/scan.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c @@ -70,6 +70,7 @@ #include "mvm.h" #include "fw-api-scan.h" +#include "iwl-io.h" #define IWL_DENSE_EBS_SCAN_RATIO 5 #define IWL_SPARSE_EBS_SCAN_RATIO 1 @@ -398,6 +399,10 @@ void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm, ieee80211_scan_completed(mvm->hw, scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED); iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); + del_timer(&mvm->scan_timer); + } else { + IWL_ERR(mvm, + "got scan complete notification but no scan is running\n"); } mvm->last_ebs_successful = @@ -1217,6 +1222,18 @@ static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type) return -EIO; } +#define SCAN_TIMEOUT (16 * HZ) + +void iwl_mvm_scan_timeout(unsigned long data) +{ + struct iwl_mvm *mvm = (struct iwl_mvm *)data; + + IWL_ERR(mvm, "regular scan timed out\n"); + + del_timer(&mvm->scan_timer); + iwl_force_nmi(mvm->trans); +} + int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct cfg80211_scan_request *req, struct ieee80211_scan_ies *ies) @@ -1296,6 +1313,8 @@ int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, mvm->scan_status |= IWL_MVM_SCAN_REGULAR; iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN); + mod_timer(&mvm->scan_timer, jiffies + SCAN_TIMEOUT); + return 0; } @@ -1413,6 +1432,7 @@ void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm, if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) { ieee80211_scan_completed(mvm->hw, aborted); iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); + del_timer(&mvm->scan_timer); } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) { ieee80211_sched_scan_stopped(mvm->hw); mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; @@ -1608,6 +1628,7 @@ out: * to release the scan reference here. */ iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); + del_timer(&mvm->scan_timer); if (notify) ieee80211_scan_completed(mvm->hw, true); } else if (notify) { |