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ath9k: adjust ack timeout workaround patch based on upstream submission

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19638 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2010-02-15 17:28:52 +00:00
parent 51eeb15390
commit 29616c3532
1 changed files with 9 additions and 3 deletions
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12
package/mac80211/patches/520-ath9k_ack_timeout_workaround.patch
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@ -1,13 +1,19 @@
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -1233,6 +1233,11 @@ void ath9k_hw_init_global_settings(struc
@@ -1233,6 +1233,17 @@ void ath9k_hw_init_global_settings(struc
/* As defined by IEEE 802.11-2007 17.3.8.6 */
slottime = ah->slottime + 3 * ah->coverage_class;
acktimeout = slottime + sifstime;
+
+ /* Workaround for a hw issue */
+ /*
+ * Workaround for early ACK timeouts, add an offset to match the
+ * initval's 64us ack timeout value.
+ * This was initially only meant to work around an issue with delayed
+ * BA frames in some implementations, but it has been found to fix ACK
+ * timeout issues in other cases as well.
+ */
+ if (conf->channel && conf->channel->band == IEEE80211_BAND_2GHZ)
+ acktimeout = max(64, acktimeout);
+ acktimeout += 64 - sifstime - ah->slottime;
+
ath9k_hw_setslottime(ah, slottime);
ath9k_hw_set_ack_timeout(ah, acktimeout);