always-enable-dfs.patch

gehe zur Dokumentation dieser Datei

Fix für defektes DFS von https://patchwork.kernel.org/patch/10986957/
Ermögliche selektiv das Aktivieren von DFS auch im Monitor Mode.

Aktivieren
echo 1 > /sys/module/ath9k_hw/parameters/always_dfs
echo 1 > /sys/module/ath9k/parameters/always_dfs

Deaktivieren
echo 0 > /sys/module/ath9k/parameters/always_dfs
echo 0 > /sys/module/ath9k_hw/parameters/always_dfs


Credits: Till und Kai-Uwe

Index: on_firmware/openwrt/package/kernel/mac80211/patches/ath/498_always_enable_dfs.patch
===================================================================
--- /dev/null
+++ on_firmware/openwrt/package/kernel/mac80211/patches/ath/498_always_enable_dfs.patch
@@ -0,0 +1,116 @@
+--- a/drivers/net/wireless/ath/ath9k/channel.c    2016-01-15 13:00:08.000000000 +0100
++++ b/drivers/net/wireless/ath/ath9k/channel.c    2017-01-02 00:29:17.023553203 +0100
+@@ -80,7 +80,8 @@
+  /* Enable radar pulse detection if on a DFS channel. Spectral
+   * scanning and radar detection can not be used concurrently.
+   */
+- if (hw->conf.radar_enabled) {
++ if (hw->conf.radar_enabled || (ath9k_always_dfs == 1)) {
++     ath_dbg(common, DFS, "RADAR detection enabled (" __FILE__ ", l. %d)\n", __LINE__);
+      u32 rxfilter;
+
+      rxfilter = ath9k_hw_getrxfilter(ah);
+--- a/drivers/net/wireless/ath/ath9k/dfs.c    2016-01-15 13:00:08.000000000 +0100
++++ b/drivers/net/wireless/ath/ath9k/dfs.c    2017-01-02 00:30:52.159530173 +0100
+@@ -275,6 +275,9 @@
+ static void
+ ath9k_dfs_process_radar_pulse(struct ath_softc *sc, struct pulse_event *pe)
+ {
++ struct ath_hw *ah = sc->sc_ah;
++ struct ath_common *common = ath9k_hw_common(ah);
++
+  struct dfs_pattern_detector *pd = sc->dfs_detector;
+  DFS_STAT_INC(sc, pulses_processed);
+  if (pd == NULL)
+@@ -282,7 +285,11 @@
+  if (!pd->add_pulse(pd, pe))
+      return;
+  DFS_STAT_INC(sc, radar_detected);
++if (ath9k_always_dfs == 0) {
+  ieee80211_radar_detected(sc->hw);
++} else {
++ ath_dbg(common, DFS, "RADAR detection enabled, radar_detected suppressed (" __FILE__ ", l. %d)\n", __LINE__);
++}
+ }
+
+ /*
+--- a/drivers/net/wireless/ath/ath9k/hw.c 2017-01-10 17:13:57.801668156 +0100
++++ b/drivers/net/wireless/ath/ath9k/hw.c 2017-01-10 17:15:50.755896588 +0100
+@@ -37,6 +37,11 @@
+ MODULE_SUPPORTED_DEVICE("Atheros 802.11n WLAN cards");
+ MODULE_LICENSE("Dual BSD/GPL");
+
++static int ath9k_hw_always_dfs = 0;
++module_param_named(always_dfs, ath9k_hw_always_dfs, int, 0644);
++MODULE_PARM_DESC(always_dfs, "Enable DFS messages in all modes");
++
++
+ static void ath9k_hw_set_clockrate(struct ath_hw *ah)
+ {
+  struct ath_common *common = ath9k_hw_common(ah);
+@@ -2071,7 +2076,8 @@
+  if (AR_SREV_9565(ah) && common->bt_ant_diversity)
+      REG_SET_BIT(ah, AR_BTCOEX_WL_LNADIV, AR_BTCOEX_WL_LNADIV_FORCE_ON);
+
+- if (ah->hw->conf.radar_enabled) {
++ if (ah->hw->conf.radar_enabled || (ath9k_hw_always_dfs == 1)) {
++     ath_dbg(common, DFS, "RADAR detection enabled (" __FILE__ ", l. %d)\n", __LINE__);
+      /* set HW specific DFS configuration */
+      ah->radar_conf.ext_channel = IS_CHAN_HT40(chan);
+      ath9k_hw_set_radar_params(ah);
+--- a/drivers/net/wireless/ath/ath9k/recv.c   2016-01-15 13:00:08.000000000 +0100
++++ b/drivers/net/wireless/ath/ath9k/recv.c   2017-01-02 00:32:21.347509158 +0100
+@@ -384,8 +384,10 @@
+      | ATH9K_RX_FILTER_MCAST;
+
+  /* if operating on a DFS channel, enable radar pulse detection */
+- if (sc->hw->conf.radar_enabled)
++ if (sc->hw->conf.radar_enabled || (ath9k_always_dfs == 1)) {
++     ath_dbg(common, DFS, "RADAR detection enabled (" __FILE__ ", l. %d)\n", __LINE__);
+      rfilt |= ATH9K_RX_FILTER_PHYRADAR | ATH9K_RX_FILTER_PHYERR;
++ }
+
+  spin_lock_bh(&sc->chan_lock);
+
+@@ -815,6 +817,7 @@
+  struct ath_common *common = ath9k_hw_common(ah);
+  struct ieee80211_hdr *hdr;
+  bool discard_current = sc->rx.discard_next;
++ bool is_phyerr;
+ 
+  /*
+   * Discard corrupt descriptors which are marked in
+@@ -827,8 +830,11 @@
+ 
+  /*
+   * Discard zero-length packets and packets smaller than an ACK
++  * which are not PHY_ERROR (short radar pulses have a length of 3)
+   */
+- if (rx_stats->rs_datalen < 10) {
++ is_phyerr = rx_stats->rs_status & ATH9K_RXERR_PHY;
++ if (!rx_stats->rs_datalen ||
++     (rx_stats->rs_datalen < 10 && !is_phyerr)) {
+      RX_STAT_INC(rx_len_err);
+      goto corrupt;
+  }
+--- a/drivers/net/wireless/ath/ath9k/init.c   2017-01-06 22:11:58.251673645 +0100
++++ b/drivers/net/wireless/ath/ath9k/init.c   2017-01-06 22:36:34.600625015 +0100
+@@ -45,6 +45,10 @@
+ module_param_named(nohwcrypt, ath9k_modparam_nohwcrypt, int, 0444);
+ MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption");
+
++int ath9k_always_dfs = 0;
++module_param_named(always_dfs, ath9k_always_dfs, int, 0644);
++MODULE_PARM_DESC(always_dfs, "Enforce RADAR detection on all channels, disrupt DFS");
++
+ int ath9k_led_blink = 1;
+ module_param_named(blink, ath9k_led_blink, int, 0444);
+ MODULE_PARM_DESC(blink, "Enable LED blink on activity");
+--- a/drivers/net/wireless/ath/ath9k/ath9k.h  2017-01-06 22:11:00.163648461 +0100
++++ b/drivers/net/wireless/ath/ath9k/ath9k.h  2017-01-06 22:11:49.267669620 +0100
+@@ -38,6 +38,7 @@
+ extern int led_blink;
+ extern bool is_ath9k_unloaded;
+ extern int ath9k_use_chanctx;
++extern int ath9k_always_dfs;
+
+ /*************************/