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Commit aaefb183 authored by Ping-Ke Shih's avatar Ping-Ke Shih Committed by Greg Kroah-Hartman
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mac80211: allow non-standard VHT MCS-10/11 

[ Upstream commit 04be6d337d37400ad5b3d5f27ca87645ee5a18a3 ]

Some AP can possibly try non-standard VHT rate and mac80211 warns and drops
packets, and leads low TCP throughput.

    Rate marked as a VHT rate but data is invalid: MCS: 10, NSS: 2
    WARNING: CPU: 1 PID: 7817 at net/mac80211/rx.c:4856 ieee80211_rx_list+0x223/0x2f0 [mac8021

Since commit c27aa56a72b8 ("cfg80211: add VHT rate entries for MCS-10 and MCS-11")
has added, mac80211 adds this support as well.

After this patch, throughput is good and iw can get the bitrate:
    rx bitrate:	975.1 MBit/s VHT-MCS 10 80MHz short GI VHT-NSS 2
or
    rx bitrate:	1083.3 MBit/s VHT-MCS 11 80MHz short GI VHT-NSS 2

Buglink: https://bugzilla.suse.com/show_bug.cgi?id=1192891


Reported-by: default avatarGoldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: default avatarPing-Ke Shih <pkshih@realtek.com>
Link: https://lore.kernel.org/r/20220103013623.17052-1-pkshih@realtek.com


Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 5253794b

net/mac80211/rx.c

+1 −1
Original line number Diff line number Diff line
@@ -4693,7 +4693,7 @@ void ieee80211_rx_napi(struct ieee80211_hw *hw, struct ieee80211_sta *pubsta, 
				goto drop;

			break;

		case RX_ENC_VHT:

			if (WARN_ONCE(status->rate_idx > 9 ||

			if (WARN_ONCE(status->rate_idx > 11 ||

				      !status->nss ||

				      status->nss > 8,

				      "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n",