From: Kai-Heng Feng <kai.heng.feng@canonical.com>
To: yhchuang@realtek.com
Cc: Kai-Heng Feng <kai.heng.feng@canonical.com>,
Kalle Valo <kvalo@codeaurora.org>,
"David S. Miller" <davem@davemloft.net>,
linux-wireless@vger.kernel.org (open list:REALTEK WIRELESS
DRIVER (rtw88)),
netdev@vger.kernel.org (open list:NETWORKING DRIVERS),
linux-kernel@vger.kernel.org (open list)
Subject: [PATCH] rtw88: Add delay on polling h2c command status bit
Date: Mon, 6 Apr 2020 17:36:22 +0800 [thread overview]
Message-ID: <20200406093623.3980-1-kai.heng.feng@canonical.com> (raw)
On some systems we can constanly see rtw88 complains:
[39584.721375] rtw_pci 0000:03:00.0: failed to send h2c command
Increase interval of each check to wait the status bit really changes.
While at it, add some helpers so we can use standarized
readx_poll_timeout() macro.
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
---
drivers/net/wireless/realtek/rtw88/fw.c | 12 ++++++------
drivers/net/wireless/realtek/rtw88/hci.h | 4 ++++
2 files changed, 10 insertions(+), 6 deletions(-)
diff --git a/drivers/net/wireless/realtek/rtw88/fw.c b/drivers/net/wireless/realtek/rtw88/fw.c
index 05c430b3489c..bc9982e77524 100644
--- a/drivers/net/wireless/realtek/rtw88/fw.c
+++ b/drivers/net/wireless/realtek/rtw88/fw.c
@@ -2,6 +2,8 @@
/* Copyright(c) 2018-2019 Realtek Corporation
*/
+#include <linux/iopoll.h>
+
#include "main.h"
#include "coex.h"
#include "fw.h"
@@ -193,8 +195,8 @@ static void rtw_fw_send_h2c_command(struct rtw_dev *rtwdev,
u8 box;
u8 box_state;
u32 box_reg, box_ex_reg;
- u32 h2c_wait;
int idx;
+ int ret;
rtw_dbg(rtwdev, RTW_DBG_FW,
"send H2C content %02x%02x%02x%02x %02x%02x%02x%02x\n",
@@ -226,12 +228,10 @@ static void rtw_fw_send_h2c_command(struct rtw_dev *rtwdev,
goto out;
}
- h2c_wait = 20;
- do {
- box_state = rtw_read8(rtwdev, REG_HMETFR);
- } while ((box_state >> box) & 0x1 && --h2c_wait > 0);
+ ret = readx_poll_timeout(rr8, REG_HMETFR, box_state,
+ !((box_state >> box) & 0x1), 100, 3000);
- if (!h2c_wait) {
+ if (ret) {
rtw_err(rtwdev, "failed to send h2c command\n");
goto out;
}
diff --git a/drivers/net/wireless/realtek/rtw88/hci.h b/drivers/net/wireless/realtek/rtw88/hci.h
index 2cba327e6218..24062c7079c6 100644
--- a/drivers/net/wireless/realtek/rtw88/hci.h
+++ b/drivers/net/wireless/realtek/rtw88/hci.h
@@ -253,6 +253,10 @@ rtw_write8_mask(struct rtw_dev *rtwdev, u32 addr, u32 mask, u8 data)
rtw_write8(rtwdev, addr, set);
}
+#define rr8(addr) rtw_read8(rtwdev, addr)
+#define rr16(addr) rtw_read16(rtwdev, addr)
+#define rr32(addr) rtw_read32(rtwdev, addr)
+
static inline enum rtw_hci_type rtw_hci_type(struct rtw_dev *rtwdev)
{
return rtwdev->hci.type;
--
2.17.1
next reply other threads:[~2020-04-06 9:36 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-06 9:36 Kai-Heng Feng [this message]
2020-04-06 11:01 ` [PATCH] rtw88: Add delay on polling h2c command status bit Tony Chuang
2020-04-06 11:56 ` Kai-Heng Feng
2020-04-06 12:17 ` Kalle Valo
2020-04-06 13:18 ` Kai-Heng Feng
2020-04-06 13:24 ` Kalle Valo
2020-04-06 13:35 ` Kai-Heng Feng
2020-04-06 14:03 ` Kalle Valo
2020-04-07 7:20 ` Kai-Heng Feng
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