linux-kernel - [PATCH 1/3] mwifiex: disable ps_mode explicitly by default instead

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Message-Id: <20201028142433.18501-2-kitakar@gmail.com>
Date:   Wed, 28 Oct 2020 23:24:31 +0900
From:   Tsuchiya Yuto <kitakar@...il.com>
To:     Amitkumar Karwar <amitkarwar@...il.com>,
        Ganapathi Bhat <ganapathi.bhat@....com>,
        Xinming Hu <huxinming820@...il.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Maximilian Luz <luzmaximilian@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...el.com>, verdre@...d.nl,
        Tsuchiya Yuto <kitakar@...il.com>
Subject: [PATCH 1/3] mwifiex: disable ps_mode explicitly by default instead

On Microsoft Surface devices (PCIe-88W8897), the ps_mode causes
connection unstable, especially with 5GHz APs. Then, it eventually causes
fw crash.

This commit disables ps_mode by default instead of enabling it.

Required code is extracted from mwifiex_drv_set_power().

Signed-off-by: Tsuchiya Yuto <kitakar@...il.com>
---
 drivers/net/wireless/marvell/mwifiex/sta_cmd.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/marvell/mwifiex/sta_cmd.c b/drivers/net/wireless/marvell/mwifiex/sta_cmd.c
index d3a968ef21ef9..9b7b52fbc9c45 100644
--- a/drivers/net/wireless/marvell/mwifiex/sta_cmd.c
+++ b/drivers/net/wireless/marvell/mwifiex/sta_cmd.c
@@ -2333,14 +2333,19 @@ int mwifiex_sta_init_cmd(struct mwifiex_private *priv, u8 first_sta, bool init)
 			return -1;
 
 		if (priv->bss_type != MWIFIEX_BSS_TYPE_UAP) {
-			/* Enable IEEE PS by default */
-			priv->adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_PSP;
+			/* Disable IEEE PS by default */
+			priv->adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
 			ret = mwifiex_send_cmd(priv,
 					       HostCmd_CMD_802_11_PS_MODE_ENH,
-					       EN_AUTO_PS, BITMAP_STA_PS, NULL,
+					       DIS_AUTO_PS, BITMAP_STA_PS, NULL,
 					       true);
 			if (ret)
 				return -1;
+			ret = mwifiex_send_cmd(priv,
+					       HostCmd_CMD_802_11_PS_MODE_ENH,
+					       GET_PS, 0, NULL, false);
+			if (ret)
+				return -1;
 		}
 
 		if (drcs) {
-- 
2.29.1