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Most mac80211 drivers leave the SMPS field in the HT capabilities uninitialized (unfortunately defaults to static SMPS), which leads to some devices limiting themselves to single-stream rates in some modes (mostly mesh and IBSS). Signed-off-by: Felix Fietkau <nbd@nbd.name>
42 lines
1.4 KiB
Diff
42 lines
1.4 KiB
Diff
From: Felix Fietkau <nbd@nbd.name>
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Date: Wed, 11 Jan 2017 23:30:20 +0100
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Subject: [PATCH] mac80211: initialize SMPS field in HT capabilities
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ibss and mesh modes copy the ht capabilites from the band without
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overriding the SMPS state. Unfortunately the default value 0 for the
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SMPS field means static SMPS instead of disabled.
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This results in HT ibss and mesh setups using only single-stream rates,
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even though SMPS is not supposed to be active.
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Initialize SMPS to disabled for all bands on ieee80211_hw_register to
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ensure that the value is sane where it is not overriden with the real
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SMPS state.
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Reported-by: Elektra Wagenrad <onelektra@gmx.net>
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/net/mac80211/main.c
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+++ b/net/mac80211/main.c
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@@ -908,10 +908,15 @@ int ieee80211_register_hw(struct ieee802
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supp_ht = supp_ht || sband->ht_cap.ht_supported;
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supp_vht = supp_vht || sband->vht_cap.vht_supported;
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- if (sband->ht_cap.ht_supported)
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- local->rx_chains =
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- max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
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- local->rx_chains);
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+ if (!sband->ht_cap.ht_supported)
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+ continue;
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+
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+ local->rx_chains =
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+ max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
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+ local->rx_chains);
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+
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+ sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
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+ IEEE80211_HT_CAP_SM_PS_SHIFT;
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/* TODO: consider VHT for RX chains, hopefully it's the same */
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}
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