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From: Ping-Ke Shih <pkshih@realtek.com>
To: <tony0620emma@gmail.com>, <kvalo@codeaurora.org>
Cc: <linux-wireless@vger.kernel.org>, <timlee@realtek.com>
Subject: [PATCH 1/4] rtw88: use read_poll_timeout instead of fixed sleep
Date: Tue, 27 Jul 2021 18:00:43 +0800	[thread overview]
Message-ID: <20210727100046.30116-2-pkshih@realtek.com> (raw)
In-Reply-To: <20210727100046.30116-1-pkshih@realtek.com>

From: Chin-Yen Lee <timlee@realtek.com>

In current wow flow, driver calls rtw_wow_fw_start and sleep for 100ms,
to wait firmware finish preliminary work and then update the value of
WOWLAN_WAKE_REASON register to zero. But later firmware will start wow
function with power-saving mode, in which mode the value of
WOWLAN_WAKE_REASON register is 0xea. So driver may get 0xea value and
return fail. We use read_poll_timeout instead to check the value to avoid
this issue.

Signed-off-by: Chin-Yen Lee <timlee@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw88/wow.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw88/wow.c b/drivers/net/wireless/realtek/rtw88/wow.c
index fc9544f4e5e4..bdccfa70dddc 100644
--- a/drivers/net/wireless/realtek/rtw88/wow.c
+++ b/drivers/net/wireless/realtek/rtw88/wow.c
@@ -283,15 +283,26 @@ static void rtw_wow_rx_dma_start(struct rtw_dev *rtwdev)
 
 static int rtw_wow_check_fw_status(struct rtw_dev *rtwdev, bool wow_enable)
 {
-	/* wait 100ms for wow firmware to finish work */
-	msleep(100);
+	int ret;
+	u8 check;
+	u32 check_dis;
 
 	if (wow_enable) {
-		if (rtw_read8(rtwdev, REG_WOWLAN_WAKE_REASON))
+		ret = read_poll_timeout(rtw_read8, check, !check, 1000,
+					100000, true, rtwdev,
+					REG_WOWLAN_WAKE_REASON);
+		if (ret)
 			goto wow_fail;
 	} else {
-		if (rtw_read32_mask(rtwdev, REG_FE1IMR, BIT_FS_RXDONE) ||
-		    rtw_read32_mask(rtwdev, REG_RXPKT_NUM, BIT_RW_RELEASE))
+		ret = read_poll_timeout(rtw_read32_mask, check_dis,
+					!check_dis, 1000, 100000, true, rtwdev,
+					REG_FE1IMR, BIT_FS_RXDONE);
+		if (ret)
+			goto wow_fail;
+		ret = read_poll_timeout(rtw_read32_mask, check_dis,
+					!check_dis, 1000, 100000, false, rtwdev,
+					REG_RXPKT_NUM, BIT_RW_RELEASE);
+		if (ret)
 			goto wow_fail;
 	}
 
-- 
2.25.1


  reply	other threads:[~2021-07-27 10:01 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-27 10:00 [PATCH 0/4] rtw88: fix WoWLAN function and report reason to mac80211 Ping-Ke Shih
2021-07-27 10:00 ` Ping-Ke Shih [this message]
2021-07-27 10:00 ` [PATCH 2/4] rtw88: refine the setting of rsvd pages for different firmware Ping-Ke Shih
2021-07-27 10:00 ` [PATCH 3/4] rtw88: wow: report wow reason through mac80211 api Ping-Ke Shih
2021-07-28  0:53   ` kernel test robot
2021-07-28  1:52     ` Pkshih
2021-07-27 10:00 ` [PATCH 4/4] rtw88: wow: fix size access error of probe request Ping-Ke Shih

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