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Commit 41403829 authored by Felix Fietkau's avatar Felix Fietkau Committed by Greg Kroah-Hartman
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ath9k: fix transmitting to stations in dynamic SMPS mode


commit 3b9ea720 upstream.

When transmitting to a receiver in dynamic SMPS mode, all transmissions that
use multiple spatial streams need to be sent using CTS-to-self or RTS/CTS to
give the receiver's extra chains some time to wake up.
This fixes the tx rate getting stuck at <= MCS7 for some clients, especially
Intel ones, which make aggressive use of SMPS.

Cc: stable@vger.kernel.org
Reported-by: default avatarMartin Kennedy <hurricos@gmail.com>
Signed-off-by: default avatarFelix Fietkau <nbd@nbd.name>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210214184911.96702-1-nbd@nbd.name


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent dd143bd6
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