This is a note to let you know that I've just added the patch titled
mt76: mt7915: fix bit fields for HT rate idx
to the 5.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mt76-mt7915-fix-bit-fields-for-ht-rate-idx.patch
and it can be found in the queue-5.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 83ac973b521b4722803475c4ca8323bfcc32116d
Author: Shayne Chen <shayne.chen@xxxxxxxxxxxx>
Date: Tue Jul 20 21:00:14 2021 +0800
mt76: mt7915: fix bit fields for HT rate idx
[ Upstream commit 47f1c08db7f3aaa2d13f8e56209375462ace7b8a ]
The bit fields of tx rate idx should be 6 bits, otherwise it might be
incorrect in HT mode.
For VHT/HE rates, only 4 bits are actually used by rate idx, the other
2 bits are used for other functions.
Fixes: c31d94af1843 ("mt76: mt7915: fix tx rate related fields in tx descriptor")
Signed-off-by: Shayne Chen <shayne.chen@xxxxxxxxxxxx>
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.h b/drivers/net/wireless/mediatek/mt76/mt7915/mac.h
index eb1885f4bd8eb..fee7741b5d421 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.h
@@ -272,7 +272,8 @@ enum tx_mcu_port_q_idx {
#define MT_TX_RATE_MODE GENMASK(9, 6)
#define MT_TX_RATE_SU_EXT_TONE BIT(5)
#define MT_TX_RATE_DCM BIT(4)
-#define MT_TX_RATE_IDX GENMASK(3, 0)
+/* VHT/HE only use bits 0-3 */
+#define MT_TX_RATE_IDX GENMASK(5, 0)
#define MT_TXP_MAX_BUF_NUM 6
