From: Ping-Ke Shih pkshih@realtek.com
[ 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: Goldwyn Rodrigues rgoldwyn@suse.com Signed-off-by: Ping-Ke Shih pkshih@realtek.com Link: https://lore.kernel.org/r/20220103013623.17052-1-pkshih@realtek.com Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/mac80211/rx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index e0baa563a4dea..c42cc79895202 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -4620,7 +4620,7 @@ 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",