From: Felix Fietkau <nbd@openwrt.org>
Date: Mon, 11 Nov 2013 21:23:34 +0000 (+0100)
Subject: ath9k: optimize ath_drain_all_txq
X-Git-Tag: submit/tizen/20160607.132125~5255^2~482^2^2~134
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=10ffb6a77e617a8f5ded84b504550759ec4a8df0;p=sdk%2Femulator%2Femulator-kernel.git

ath9k: optimize ath_drain_all_txq

If the software has processed all packets, checking the hardware queue
is unnecessary.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
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 95f6c5a..24846d9 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -1786,6 +1786,9 @@ bool ath_drain_all_txq(struct ath_softc *sc)
 		if (!ATH_TXQ_SETUP(sc, i))
 			continue;
 
+		if (!sc->tx.txq[i].axq_depth)
+			continue;
+
 		if (ath9k_hw_numtxpending(ah, sc->tx.txq[i].axq_qnum))
 			npend |= BIT(i);
 	}