Commit d59d2f99 authored Jul 06, 2018 by Ping-Ke Shih Committed by Greg Kroah-Hartman Jul 06, 2018

staging: r8822be: Fix RTL8822be can't find any wireless AP



RTL8822be can't bring up properly on ASUS X530UN, and dmesg says:
[ 8.591333] r8822be: module is from the staging directory, the quality
is unknown, you have been warned.
[ 8.593122] r8822be 0000:02:00.0: enabling device (0000 -> 0003)
[ 8.669163] r8822be: Using firmware rtlwifi/rtl8822befw.bin
[ 9.289939] r8822be: rtlwifi: wireless switch is on
[ 10.056426] r8822be 0000:02:00.0 wlp2s0: renamed from wlan0
...
[ 11.952534] r8822be: halmac_init_hal failed
[ 11.955933] r8822be: halmac_init_hal failed
[ 11.956227] r8822be: halmac_init_hal failed
[ 22.007942] r8822be: halmac_init_hal failed

Jian-Hong reported it works if turn off ASPM with module parameter aspm=0.
In order to fix this problem kindly, this commit don't turn off aspm but
enlarge ASPM L1 latency to 7.

Reported-by: Jian-Hong Pan <jian-hong@endlessm.com>
Tested-by: Jian-Hong Pan <jian-hong@endlessm.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 920c9244

drivers/staging/rtlwifi/rtl8822be/hw.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -803,7 +803,7 @@ static void _rtl8822be_enable_aspm_back_door(struct ieee80211_hw *hw)
		return;

		pci_read_config_byte(rtlpci->pdev, 0x70f, &tmp);
		pci_write_config_byte(rtlpci->pdev, 0x70f, tmp \| BIT(7));
		pci_write_config_byte(rtlpci->pdev, 0x70f, tmp \| ASPM_L1_LATENCY << 3);

		pci_read_config_byte(rtlpci->pdev, 0x719, &tmp);
		pci_write_config_byte(rtlpci->pdev, 0x719, tmp \| BIT(3) \| BIT(4));

drivers/staging/rtlwifi/wifi.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -88,6 +88,7 @@
		#define RTL_USB_MAX_RX_COUNT 100
		#define QBSS_LOAD_SIZE 5
		#define MAX_WMMELE_LENGTH 64
		#define ASPM_L1_LATENCY 7

		#define TOTAL_CAM_ENTRY 32