From edb6d6885bef82d1eac432dbeca9fbf4ec349d7e Mon Sep 17 00:00:00 2001
From: Chung-Hsien Hsu <stanley.hsu@cypress.com>
Date: Thu, 27 Sep 2018 14:59:44 +0000
Subject: [PATCH] brcmfmac: reduce timeout for action frame scan
Git-commit: edb6d6885bef82d1eac432dbeca9fbf4ec349d7e
Patch-mainline: v4.20-rc1
References: bsc#1051510

Finding a common channel to send an action frame out is required for
some action types. Since a loop with several scan retry is used to find
the channel, a short wait time could be considered for each attempt.
This patch reduces the wait time from 1500 to 450 msec for each action
frame scan.

This patch fixes the WFA p2p certification 5.1.20 failure caused by the
long action frame send time.

Signed-off-by: Chung-Hsien Hsu <stanley.hsu@cypress.com>
Signed-off-by: Chi-Hsien Lin <chi-hsien.lin@cypress.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c
index 3e9c4f2f5dd1..7822740a8cb4 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c
@@ -74,7 +74,7 @@
 #define P2P_AF_MAX_WAIT_TIME		msecs_to_jiffies(2000)
 #define P2P_INVALID_CHANNEL		-1
 #define P2P_CHANNEL_SYNC_RETRY		5
-#define P2P_AF_FRM_SCAN_MAX_WAIT	msecs_to_jiffies(1500)
+#define P2P_AF_FRM_SCAN_MAX_WAIT	msecs_to_jiffies(450)
 #define P2P_DEFAULT_SLEEP_TIME_VSDB	200
 
 /* WiFi P2P Public Action Frame OUI Subtypes */
@@ -1134,7 +1134,6 @@ static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p)
 {
 	struct afx_hdl *afx_hdl = &p2p->afx_hdl;
 	struct brcmf_cfg80211_vif *pri_vif;
-	unsigned long duration;
 	s32 retry;
 
 	brcmf_dbg(TRACE, "Enter\n");
@@ -1150,7 +1149,6 @@ static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p)
 	 * pending action frame tx is cancelled.
 	 */
 	retry = 0;
-	duration = msecs_to_jiffies(P2P_AF_FRM_SCAN_MAX_WAIT);
 	while ((retry < P2P_CHANNEL_SYNC_RETRY) &&
 	       (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) {
 		afx_hdl->is_listen = false;
@@ -1158,7 +1156,8 @@ static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p)
 			  retry);
 		/* search peer on peer's listen channel */
 		schedule_work(&afx_hdl->afx_work);
-		wait_for_completion_timeout(&afx_hdl->act_frm_scan, duration);
+		wait_for_completion_timeout(&afx_hdl->act_frm_scan,
+					    P2P_AF_FRM_SCAN_MAX_WAIT);
 		if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
 		    (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
 			       &p2p->status)))
@@ -1171,7 +1170,7 @@ static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p)
 			afx_hdl->is_listen = true;
 			schedule_work(&afx_hdl->afx_work);
 			wait_for_completion_timeout(&afx_hdl->act_frm_scan,
-						    duration);
+						    P2P_AF_FRM_SCAN_MAX_WAIT);
 		}
 		if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
 		    (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
-- 
2.16.4