From: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Date: Wed, 31 Aug 2011 05:17:30 +0000 (+0530)
Subject: ath9k_hw: Fix rx latency of 11a mode
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=81a91d575512de74b1455d0ea213bde6f7b1e026;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

ath9k_hw: Fix rx latency of 11a mode

Rx latecy to start signal(usec) of 11a is 41 not 37 and
also corrected the rx delay in quarter rate.

Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 468ac4b17df..16884c416a7 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -975,7 +975,10 @@ void ath9k_hw_init_global_settings(struct ath_hw *ah)
 	if (ah->misc_mode != 0)
 		REG_SET_BIT(ah, AR_PCU_MISC, ah->misc_mode);
 
-	rx_lat = 37;
+	if (IS_CHAN_A_FAST_CLOCK(ah, chan))
+		rx_lat = 41;
+	else
+		rx_lat = 37;
 	tx_lat = 54;
 
 	if (IS_CHAN_HALF_RATE(chan)) {
@@ -989,7 +992,7 @@ void ath9k_hw_init_global_settings(struct ath_hw *ah)
 		sifstime = 32;
 	} else if (IS_CHAN_QUARTER_RATE(chan)) {
 		eifs = 340;
-		rx_lat *= 4;
+		rx_lat = (rx_lat * 4) - 1;
 		tx_lat *= 4;
 		if (IS_CHAN_A_FAST_CLOCK(ah, chan))
 		    tx_lat += 22;