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@@ -1,13 +1,19 @@
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--- a/drivers/net/wireless/ath/ath9k/hw.c
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+++ b/drivers/net/wireless/ath/ath9k/hw.c
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-@@ -1233,6 +1233,11 @@ void ath9k_hw_init_global_settings(struc
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+@@ -1233,6 +1233,17 @@ void ath9k_hw_init_global_settings(struc
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/* As defined by IEEE 802.11-2007 17.3.8.6 */
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slottime = ah->slottime + 3 * ah->coverage_class;
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acktimeout = slottime + sifstime;
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+
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-+ /* Workaround for a hw issue */
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++ /*
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++ * Workaround for early ACK timeouts, add an offset to match the
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++ * initval's 64us ack timeout value.
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++ * This was initially only meant to work around an issue with delayed
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++ * BA frames in some implementations, but it has been found to fix ACK
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++ * timeout issues in other cases as well.
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++ */
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+ if (conf->channel && conf->channel->band == IEEE80211_BAND_2GHZ)
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-+ acktimeout = max(64, acktimeout);
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++ acktimeout += 64 - sifstime - ah->slottime;
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+
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ath9k_hw_setslottime(ah, slottime);
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ath9k_hw_set_ack_timeout(ah, acktimeout);
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Felix Fietkau