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authorFelix Fietkau <nbd@openwrt.org>2010-01-15 23:12:21 +0000
committerFelix Fietkau <nbd@openwrt.org>2010-01-15 23:12:21 +0000
commit383cadf5d74d0da01023a5904cabcc10fd81be7d (patch)
tree8364b4abba49ceba81a4ce2c149a44b079381fe0
parentec7ce827d587c793c1c7eaf45d7c1de1e275f76b (diff)
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ath9k: add a workaround for the tx ack time issue triggered by the timing handling cleanups in 2.4 ghz, calculating the ack timeout the way it is described in 802.11-2007 currently leads to tx timeouts set it to a minimum of what the initvals set (64 usec) until we know what is causing this
SVN-Revision: 19156
-rw-r--r--package/mac80211/patches/580-ath9k_ack_timeout_workaround.patch14
1 files changed, 14 insertions, 0 deletions
diff --git a/package/mac80211/patches/580-ath9k_ack_timeout_workaround.patch b/package/mac80211/patches/580-ath9k_ack_timeout_workaround.patch
new file mode 100644
index 0000000000..953c07af6f
--- /dev/null
+++ b/package/mac80211/patches/580-ath9k_ack_timeout_workaround.patch
@@ -0,0 +1,14 @@
+--- a/drivers/net/wireless/ath/ath9k/hw.c
++++ b/drivers/net/wireless/ath/ath9k/hw.c
+@@ -1229,6 +1229,11 @@ 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 */
++ if (conf->channel && conf->channel->band == IEEE80211_BAND_2GHZ)
++ acktimeout = max(64, acktimeout);
++
+ ath9k_hw_setslottime(ah, slottime);
+ ath9k_hw_set_ack_timeout(ah, acktimeout);
+ ath9k_hw_set_cts_timeout(ah, acktimeout);