Commit f77f8234 authored by Mathias Kretschmer's avatar Mathias Kretschmer Committed by John W. Linville

ath9k: apply coverage class on slottime too

According to 802.11-2007 17.3.8.6 (slot time), the slot time should
be increased by 3 us * coverage class. The code only increased the
ack timeout, which is fixed by this patch.

We have noticed in our long shot scenario that we see less collisions
with this patch.
Signed-off-by: default avatarMathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
[add standard reference and commit message]
Signed-off-by: default avatarSimon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 27eee235
...@@ -1100,7 +1100,8 @@ void ath9k_hw_init_global_settings(struct ath_hw *ah) ...@@ -1100,7 +1100,8 @@ void ath9k_hw_init_global_settings(struct ath_hw *ah)
} }
/* As defined by IEEE 802.11-2007 17.3.8.6 */ /* As defined by IEEE 802.11-2007 17.3.8.6 */
acktimeout = slottime + sifstime + 3 * ah->coverage_class + ack_offset; slottime += 3 * ah->coverage_class;
acktimeout = slottime + sifstime + ack_offset;
ctstimeout = acktimeout; ctstimeout = acktimeout;
/* /*
......
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