wifi: rtw89: fix 8852AE disconnection caused by RX full flags

commit b74bb07cdab6859e1a3fc9fe7351052176322ddf upstream.

RX full flags are raised if certain types of RX FIFO are full, and then
drop all following MPDU of AMPDU. In order to resume to receive MPDU
when RX FIFO becomes available, we clear the register bits by the
commit a0d99ebb3ecd ("wifi: rtw89: initialize DMA of CMAC"). But, 8852AE
needs more settings to support this. To quickly fix disconnection problem,
revert the behavior as before.

Fixes: a0d99ebb3ecd ("wifi: rtw89: initialize DMA of CMAC")
Reported-by: Damian B <bronecki.damian@gmail.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=217710
Cc: <Stable@vger.kernel.org>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Tested-by: Damian B <bronecki.damian@gmail.com>
Link: https://lore.kernel.org/r/20230808005426.5327-1-pkshih@realtek.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/wireless/realtek/rtw89/mac.c b/drivers/net/wireless/realtek/rtw89/mac.c
index 077fddc..4a1c9e1 100644 (file)
--- a/drivers/net/wireless/realtek/rtw89/mac.c
+++ b/drivers/net/wireless/realtek/rtw89/mac.c
@@ -2209,7 +2209,7 @@ static int cmac_dma_init(struct rtw89_dev *rtwdev, u8 mac_idx)
        u32 reg;
        int ret;
 
-       if (chip_id != RTL8852A && chip_id != RTL8852B)
+       if (chip_id != RTL8852B)
                return 0;
 
        ret = rtw89_mac_check_mac_en(rtwdev, mac_idx, RTW89_CMAC_SEL);