This is a note to let you know that I've just added the patch titled
wifi: rtw89: limit the PPDU length for VHT rate to 0x40000
to the 6.11-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:
wifi-rtw89-limit-the-ppdu-length-for-vht-rate-to-0x4.patch
and it can be found in the queue-6.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 3979f089523887362aeecae11aaaa19c23acf323
Author: Chia-Yuan Li <leo.li@xxxxxxxxxxx>
Date: Thu Aug 15 21:40:54 2024 +0800
wifi: rtw89: limit the PPDU length for VHT rate to 0x40000
[ Upstream commit 124410976bf807e76c45e36685ed8bf959229545 ]
If the PPDU length for VHT rate exceeds 0x40000, calculating the PSDU
length will overflow. TMAC will determine the length to be too small and
as a result, all packets will be sent as ZLD (Zero Length Delimiter).
Fixes: 5f7e92c59b8e ("wifi: rtw89: 8852b: set AMSDU limit to 5000")
Signed-off-by: Chia-Yuan Li <leo.li@xxxxxxxxxxx>
Signed-off-by: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
Link: https://patch.msgid.link/20240815134054.44649-1-pkshih@xxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/wireless/realtek/rtw89/mac.c b/drivers/net/wireless/realtek/rtw89/mac.c
index e2399796aeb1e..facd32de37bce 100644
--- a/drivers/net/wireless/realtek/rtw89/mac.c
+++ b/drivers/net/wireless/realtek/rtw89/mac.c
@@ -2728,6 +2728,7 @@ bool rtw89_mac_is_qta_dbcc(struct rtw89_dev *rtwdev, enum rtw89_qta_mode mode)
static int ptcl_init_ax(struct rtw89_dev *rtwdev, u8 mac_idx)
{
+ enum rtw89_core_chip_id chip_id = rtwdev->chip->chip_id;
u32 val, reg;
int ret;
@@ -2766,6 +2767,12 @@ static int ptcl_init_ax(struct rtw89_dev *rtwdev, u8 mac_idx)
B_AX_SPE_RPT_PATH_MASK, FWD_TO_WLCPU);
}
+ if (chip_id == RTL8852A || rtw89_is_rtl885xb(rtwdev)) {
+ reg = rtw89_mac_reg_by_idx(rtwdev, R_AX_AGG_LEN_VHT_0, mac_idx);
+ rtw89_write32_mask(rtwdev, reg,
+ B_AX_AMPDU_MAX_LEN_VHT_MASK, 0x3FF80);
+ }
+
return 0;
}
diff --git a/drivers/net/wireless/realtek/rtw89/reg.h b/drivers/net/wireless/realtek/rtw89/reg.h
index 7df36f3bff0b0..b1c24eedc7e08 100644
--- a/drivers/net/wireless/realtek/rtw89/reg.h
+++ b/drivers/net/wireless/realtek/rtw89/reg.h
@@ -2440,6 +2440,10 @@
#define B_AX_RTS_TXTIME_TH_MASK GENMASK(15, 8)
#define B_AX_RTS_LEN_TH_MASK GENMASK(7, 0)
+#define R_AX_AGG_LEN_VHT_0 0xC618
+#define R_AX_AGG_LEN_VHT_0_C1 0xE618
+#define B_AX_AMPDU_MAX_LEN_VHT_MASK GENMASK(19, 0)
+
#define S_AX_CTS2S_TH_SEC_256B 1
#define R_AX_SIFS_SETTING 0xC624
#define R_AX_SIFS_SETTING_C1 0xE624
