From: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Date: Tue, 18 May 2010 01:57:54 +0000 (-0700)
Subject: ath9k: Make sure null func frame is acked before going into PS for ar9003
X-Git-Tag: v3.12-rc1~9497^2~107^2~436
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=de0f648dc769daabd0842a8dcf439d5f1f23e07f;p=kernel%2Fkernel-generic.git

ath9k: Make sure null func frame is acked before going into PS for ar9003

Add missing code to handle nullfunc frame completion in
ath_tx_edma_tasklet().

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 859aa4a..f63f6a9 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -2279,6 +2279,17 @@ void ath_tx_edma_tasklet(struct ath_softc *sc)
 
 		txok = !(txs.ts_status & ATH9K_TXERR_MASK);
 
+		/*
+		 * Make sure null func frame is acked before configuring
+		 * hw into ps mode.
+		 */
+		if (bf->bf_isnullfunc && txok) {
+			if ((sc->ps_flags & PS_ENABLED))
+				ath9k_enable_ps(sc);
+			else
+				sc->ps_flags |= PS_NULLFUNC_COMPLETED;
+		}
+
 		if (!bf_isampdu(bf)) {
 			bf->bf_retries = txs.ts_longretry;
 			if (txs.ts_status & ATH9K_TXERR_XRETRY)