From 10ffb6a77e617a8f5ded84b504550759ec4a8df0 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Mon, 11 Nov 2013 22:23:34 +0100
Subject: [PATCH] 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>
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Reading git-format-patch failed