From: Felix Fietkau <nbd@openwrt.org>
Date: Wed, 18 May 2011 12:03:04 +0000 (+0000)
Subject: ath9k: fix a small race condition in the tx_last_beacon patch
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=6400498b35fe91c25172439bc1739abd4708d84c;p=openwrt%2Fstaging%2Flinusw.git

ath9k: fix a small race condition in the tx_last_beacon patch

SVN-Revision: 26933
---

diff --git a/package/mac80211/patches/572-ath9k_tx_last_beacon.patch b/package/mac80211/patches/572-ath9k_tx_last_beacon.patch
index 4f4c3b8630..f8aad94b79 100644
--- a/package/mac80211/patches/572-ath9k_tx_last_beacon.patch
+++ b/package/mac80211/patches/572-ath9k_tx_last_beacon.patch
@@ -54,7 +54,7 @@
  
 --- a/drivers/net/wireless/ath/ath9k/main.c
 +++ b/drivers/net/wireless/ath/ath9k/main.c
-@@ -2314,6 +2314,43 @@ static bool ath9k_tx_frames_pending(stru
+@@ -2314,6 +2314,48 @@ static bool ath9k_tx_frames_pending(stru
  	return false;
  }
  
@@ -80,16 +80,21 @@
 +		return 0;
 +
 +	if (!sc->beacon.tx_processed) {
++		tasklet_disable(&sc->bcon_tasklet);
++
 +		bf = avp->av_bcbuf;
 +		if (!bf || !bf->bf_mpdu)
-+			return 0;
++			goto skip;
 +
 +		status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
 +		if (status == -EINPROGRESS)
-+			return 0;
++			goto skip;
 +
 +		sc->beacon.tx_processed = true;
-+		sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_FILT);
++		sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
++
++skip:
++		tasklet_enable(&sc->bcon_tasklet);
 +	}
 +
 +	return sc->beacon.tx_last;
@@ -98,7 +103,7 @@
  struct ieee80211_ops ath9k_ops = {
  	.tx 		    = ath9k_tx,
  	.start 		    = ath9k_start,
-@@ -2338,4 +2375,5 @@ struct ieee80211_ops ath9k_ops = {
+@@ -2338,4 +2380,5 @@ struct ieee80211_ops ath9k_ops = {
  	.set_coverage_class = ath9k_set_coverage_class,
  	.flush		    = ath9k_flush,
  	.tx_frames_pending  = ath9k_tx_frames_pending,