From: Michal Kazior <michal.kazior@tieto.com>
Date: Fri, 22 Aug 2014 12:33:18 +0000 (+0200)
Subject: ath10k: flush hif buffers before recovery
X-Git-Tag: firefly_0821_release~176^2~3043^2~133^2~55^2~5
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=61e9aab7a1930ae031d1b9d948837b5ffd8e3f5e;p=firefly-linux-kernel-4.4.55.git

ath10k: flush hif buffers before recovery

Transport buffers weren't flushed and processed
before queueing hw recovery request to mac80211.

This could in theory result in an unwanted htt/wmi
rx events being processed while mac80211 recovers
the device and possibly interfere or even crash
the system.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
---

diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index 23ba32175fcc..157dcf906f29 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -665,6 +665,7 @@ static void ath10k_core_restart(struct work_struct *work)
 	switch (ar->state) {
 	case ATH10K_STATE_ON:
 		ar->state = ATH10K_STATE_RESTARTING;
+		ath10k_hif_stop(ar);
 		ath10k_scan_finish(ar);
 		ieee80211_restart_hw(ar->hw);
 		break;