5 files changed, 66 insertions, 27 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-fw-file.h b/drivers/net/wireless/iwlwifi/iwl-fw-file.h
index 1bbe4fc47b97..660ddb1b7d8a 100644
--- a/drivers/net/wireless/iwlwifi/iwl-fw-file.h
+++ b/drivers/net/wireless/iwlwifi/iwl-fw-file.h
@@ -246,6 +246,7 @@ enum iwl_ucode_tlv_flag {
  * @IWL_UCODE_TLV_API_BASIC_DWELL: use only basic dwell time in scan command,
  *      regardless of the band or the number of the probes. FW will calculate
  *      the actual dwell time.
+ * @IWL_UCODE_TLV_API_SINGLE_SCAN_EBS: EBS is supported for single scans too.
  */
 enum iwl_ucode_tlv_api {
         IWL_UCODE_TLV_API_WOWLAN_CONFIG_TID     = BIT(0),
@@ -257,6 +258,7 @@ enum iwl_ucode_tlv_api {
         IWL_UCODE_TLV_API_SF_NO_DUMMY_NOTIF     = BIT(7),
         IWL_UCODE_TLV_API_FRAGMENTED_SCAN       = BIT(8),
         IWL_UCODE_TLV_API_BASIC_DWELL           = BIT(13),
+        IWL_UCODE_TLV_API_SINGLE_SCAN_EBS       = BIT(16),
 };
 
 /**
diff --git a/drivers/net/wireless/iwlwifi/mvm/fw-api-scan.h b/drivers/net/wireless/iwlwifi/mvm/fw-api-scan.h
index 201846de94e7..cfc0e65b34a5 100644
--- a/drivers/net/wireless/iwlwifi/mvm/fw-api-scan.h
+++ b/drivers/net/wireless/iwlwifi/mvm/fw-api-scan.h
@@ -653,8 +653,11 @@ enum iwl_scan_channel_flags {
 };
 
 /* iwl_scan_channel_opt - CHANNEL_OPTIMIZATION_API_S
- * @flags: enum iwl_scan_channel_flgs
- * @non_ebs_ratio: how many regular scan iteration before EBS
+ * @flags: enum iwl_scan_channel_flags
+ * @non_ebs_ratio: defines the ratio of number of scan iterations where EBS is
+ *      involved.
+ *      1 - EBS is disabled.
+ *      2 - every second scan will be full scan(and so on).
  */
 struct iwl_scan_channel_opt {
         __le16 flags;
diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
index e880f9d4717b..20915587c820 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
@@ -3343,18 +3343,16 @@ static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
                 msk |= mvmsta->tfd_queue_msk;
         }
 
-        if (drop) {
-                if (iwl_mvm_flush_tx_path(mvm, msk, true))
-                        IWL_ERR(mvm, "flush request fail\n");
-                mutex_unlock(&mvm->mutex);
-        } else {
-                mutex_unlock(&mvm->mutex);
+        msk &= ~BIT(vif->hw_queue[IEEE80211_AC_VO]);
 
-                /* this can take a while, and we may need/want other operations
-                 * to succeed while doing this, so do it without the mutex held
-                 */
-                iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
-        }
+        if (iwl_mvm_flush_tx_path(mvm, msk, true))
+                IWL_ERR(mvm, "flush request fail\n");
+        mutex_unlock(&mvm->mutex);
+
+        /* this can take a while, and we may need/want other operations
+         * to succeed while doing this, so do it without the mutex held
+         */
+        iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
 }
 
 const struct ieee80211_ops iwl_mvm_hw_ops = {
diff --git a/drivers/net/wireless/iwlwifi/mvm/scan.c b/drivers/net/wireless/iwlwifi/mvm/scan.c
index ec9a8e7bae1d..844bf7c4c8de 100644
--- a/drivers/net/wireless/iwlwifi/mvm/scan.c
+++ b/drivers/net/wireless/iwlwifi/mvm/scan.c
@@ -72,6 +72,8 @@
 
 #define IWL_PLCP_QUIET_THRESH 1
 #define IWL_ACTIVE_QUIET_TIME 10
+#define IWL_DENSE_EBS_SCAN_RATIO 5
+#define IWL_SPARSE_EBS_SCAN_RATIO 1
 
 struct iwl_mvm_scan_params {
         u32 max_out_time;
@@ -1105,6 +1107,12 @@ int iwl_mvm_scan_offload_stop(struct iwl_mvm *mvm, bool notify)
                 return iwl_umac_scan_stop(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN,
                                           notify);
 
+        if (mvm->scan_status == IWL_MVM_SCAN_NONE)
+                return 0;
+
+        if (iwl_mvm_is_radio_killed(mvm))
+                goto out;
+
         if (mvm->scan_status != IWL_MVM_SCAN_SCHED &&
             (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) ||
              mvm->scan_status != IWL_MVM_SCAN_OS)) {
@@ -1141,6 +1149,7 @@ int iwl_mvm_scan_offload_stop(struct iwl_mvm *mvm, bool notify)
         if (mvm->scan_status == IWL_MVM_SCAN_OS)
                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
 
+out:
         mvm->scan_status = IWL_MVM_SCAN_NONE;
 
         if (notify) {
@@ -1297,18 +1306,6 @@ iwl_mvm_build_generic_unified_scan_cmd(struct iwl_mvm *mvm,
         cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
         cmd->iter_num = cpu_to_le32(1);
 
-        if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT &&
-            mvm->last_ebs_successful) {
-                cmd->channel_opt[0].flags =
-                        cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
-                                    IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
-                                    IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
-                cmd->channel_opt[1].flags =
-                        cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
-                                    IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
-                                    IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
-        }
-
         if (iwl_mvm_rrm_scan_needed(mvm))
                 cmd->scan_flags |=
                         cpu_to_le32(IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED);
@@ -1383,6 +1380,22 @@ int iwl_mvm_unified_scan_lmac(struct iwl_mvm *mvm,
         cmd->schedule[1].iterations = 0;
         cmd->schedule[1].full_scan_mul = 0;
 
+        if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_SINGLE_SCAN_EBS &&
+            mvm->last_ebs_successful) {
+                cmd->channel_opt[0].flags =
+                        cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
+                                    IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
+                                    IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
+                cmd->channel_opt[0].non_ebs_ratio =
+                        cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
+                cmd->channel_opt[1].flags =
+                        cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
+                                    IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
+                                    IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
+                cmd->channel_opt[1].non_ebs_ratio =
+                        cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
+        }
+
         for (i = 1; i <= req->req.n_ssids; i++)
                 ssid_bitmap |= BIT(i);
 
@@ -1483,6 +1496,22 @@ int iwl_mvm_unified_sched_scan_lmac(struct iwl_mvm *mvm,
         cmd->schedule[1].iterations = 0xff;
         cmd->schedule[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER;
 
+        if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT &&
+            mvm->last_ebs_successful) {
+                cmd->channel_opt[0].flags =
+                        cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
+                                    IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
+                                    IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
+                cmd->channel_opt[0].non_ebs_ratio =
+                        cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
+                cmd->channel_opt[1].flags =
+                        cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
+                                    IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
+                                    IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
+                cmd->channel_opt[1].non_ebs_ratio =
+                        cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
+        }
+
         iwl_mvm_lmac_scan_cfg_channels(mvm, req->channels, req->n_channels,
                                        ssid_bitmap, cmd);
 
diff --git a/drivers/net/wireless/iwlwifi/mvm/tx.c b/drivers/net/wireless/iwlwifi/mvm/tx.c
index 4333306ccdee..c59d07567d90 100644
--- a/drivers/net/wireless/iwlwifi/mvm/tx.c
+++ b/drivers/net/wireless/iwlwifi/mvm/tx.c
@@ -90,8 +90,6 @@ void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
 
         if (ieee80211_is_probe_resp(fc))
                 tx_flags |= TX_CMD_FLG_TSF;
-        else if (ieee80211_is_back_req(fc))
-                tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
 
         if (ieee80211_has_morefrags(fc))
                 tx_flags |= TX_CMD_FLG_MORE_FRAG;
@@ -100,6 +98,15 @@ void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
                 u8 *qc = ieee80211_get_qos_ctl(hdr);
                 tx_cmd->tid_tspec = qc[0] & 0xf;
                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
+        } else if (ieee80211_is_back_req(fc)) {
+                struct ieee80211_bar *bar = (void *)skb->data;
+                u16 control = le16_to_cpu(bar->control);
+
+                tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
+                tx_cmd->tid_tspec = (control &
+                                     IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
+                        IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
+                WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
         } else {
                 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
                 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)