[PATCH 4/6] ath11k: purge rx pktlog when entering WoW

[Carl Huang <cjhuang@codeaurora.org>]

This change is to purge rx pktlog when entering WoW and reap
the mon_status buffer to keep it empty. When leaving WoW, host
restarts the reap timer. In WoW state, it's not allowed to feed
into mon_status rings per firmware request.

Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1

Signed-off-by: Carl Huang <cjhuang@codeaurora.org>
---
 drivers/net/wireless/ath/ath11k/core.c  |  7 +------
 drivers/net/wireless/ath/ath11k/dp_rx.c |  4 +---
 drivers/net/wireless/ath/ath11k/dp_rx.h |  2 +-
 drivers/net/wireless/ath/ath11k/wow.c   | 19 +++++++++++++++++++
 4 files changed, 22 insertions(+), 10 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/core.c b/drivers/net/wireless/ath/ath11k/core.c
index e67136b..9747659 100644
--- a/drivers/net/wireless/ath/ath11k/core.c
+++ b/drivers/net/wireless/ath/ath11k/core.c
@@ -327,12 +327,7 @@ int ath11k_core_resume(struct ath11k_base *ab)
 	ath11k_hif_ce_irq_enable(ab);
 	ath11k_hif_irq_enable(ab);
 
-	ret = ath11k_dp_rx_pktlog_start(ab);
-	if (ret) {
-		ath11k_warn(ab, "failed to start rx pktlog during resume: %d\n",
-			    ret);
-		return ret;
-	}
+	ath11k_dp_rx_pktlog_start(ab);
 
 	ret = ath11k_wow_wakeup(ab);
 	if (ret) {
diff --git a/drivers/net/wireless/ath/ath11k/dp_rx.c b/drivers/net/wireless/ath/ath11k/dp_rx.c
index 6d769ba..ae6db5d 100644
--- a/drivers/net/wireless/ath/ath11k/dp_rx.c
+++ b/drivers/net/wireless/ath/ath11k/dp_rx.c
@@ -5105,13 +5105,11 @@ int ath11k_dp_rx_pdev_mon_detach(struct ath11k *ar)
 	return 0;
 }
 
-int ath11k_dp_rx_pktlog_start(struct ath11k_base *ab)
+void ath11k_dp_rx_pktlog_start(struct ath11k_base *ab)
 {
 	/* start reap timer */
 	mod_timer(&ab->mon_reap_timer,
 		  jiffies + msecs_to_jiffies(ATH11K_MON_TIMER_INTERVAL));
-
-	return 0;
 }
 
 int ath11k_dp_rx_pktlog_stop(struct ath11k_base *ab, bool stop_timer)
diff --git a/drivers/net/wireless/ath/ath11k/dp_rx.h b/drivers/net/wireless/ath/ath11k/dp_rx.h
index 623da3b..2e63f2f 100644
--- a/drivers/net/wireless/ath/ath11k/dp_rx.h
+++ b/drivers/net/wireless/ath/ath11k/dp_rx.h
@@ -92,7 +92,7 @@ int ath11k_dp_rx_pdev_mon_detach(struct ath11k *ar);
 int ath11k_dp_rx_pdev_mon_attach(struct ath11k *ar);
 int ath11k_peer_rx_frag_setup(struct ath11k *ar, const u8 *peer_mac, int vdev_id);
 
-int ath11k_dp_rx_pktlog_start(struct ath11k_base *ab);
+void ath11k_dp_rx_pktlog_start(struct ath11k_base *ab);
 int ath11k_dp_rx_pktlog_stop(struct ath11k_base *ab, bool stop_timer);
 
 #endif /* ATH11K_DP_RX_H */
diff --git a/drivers/net/wireless/ath/ath11k/wow.c b/drivers/net/wireless/ath/ath11k/wow.c
index 35f1c5c..8bd2ca2 100644
--- a/drivers/net/wireless/ath/ath11k/wow.c
+++ b/drivers/net/wireless/ath/ath11k/wow.c
@@ -13,6 +13,7 @@
 #include "debug.h"
 #include "wmi.h"
 #include "wow.h"
+#include "dp_rx.h"
 
 static const struct wiphy_wowlan_support ath11k_wowlan_support = {
 	.flags = WIPHY_WOWLAN_DISCONNECT |
@@ -557,6 +558,14 @@ int ath11k_wow_op_suspend(struct ieee80211_hw *hw,
 
 	mutex_lock(&ar->conf_mutex);
 
+	ret = ath11k_dp_rx_pktlog_stop(ar->ab, true);
+	if (ret) {
+		ath11k_warn(ar->ab,
+			    "failed to stop dp rx (and timer) pktlog during wow suspend: %d\n",
+			    ret);
+		goto exit;
+	}
+
 	ret =  ath11k_wow_cleanup(ar);
 	if (ret) {
 		ath11k_warn(ar->ab, "failed to clear wow wakeup events: %d\n",
@@ -590,6 +599,14 @@ int ath11k_wow_op_suspend(struct ieee80211_hw *hw,
 		goto cleanup;
 	}
 
+	ret = ath11k_dp_rx_pktlog_stop(ar->ab, false);
+	if (ret) {
+		ath11k_warn(ar->ab,
+			    "failed to stop dp rx pktlog during wow suspend: %d\n",
+			    ret);
+		goto cleanup;
+	}
+
 	ath11k_ce_stop_shadow_timers(ar->ab);
 	ath11k_dp_stop_shadow_timers(ar->ab);
 
@@ -640,6 +657,8 @@ int ath11k_wow_op_resume(struct ieee80211_hw *hw)
 	ath11k_hif_ce_irq_enable(ar->ab);
 	ath11k_hif_irq_enable(ar->ab);
 
+	ath11k_dp_rx_pktlog_start(ar->ab);
+
 	ret = ath11k_wow_wakeup(ar->ab);
 	if (ret) {
 		ath11k_warn(ar->ab, "failed to wakeup from wow: %d\n", ret);
-- 
2.7.4