linux-kernel - [PATCH 2/2] rtw88: Use udelay instead of usleep in atomic context

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Message-Id: <20200423063811.2636-2-kai.heng.feng@canonical.com>
Date:   Thu, 23 Apr 2020 14:38:10 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     yhchuang@...ltek.com, kvalo@...eaurora.org
Cc:     Kai-Heng Feng <kai.heng.feng@...onical.com>,
        "David S. Miller" <davem@...emloft.net>,
        linux-wireless@...r.kernel.org (open list:REALTEK WIRELESS DRIVER
        (rtw88)), netdev@...r.kernel.org (open list:NETWORKING DRIVERS),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 2/2] rtw88: Use udelay instead of usleep in atomic context

It's incorrect to use usleep in atomic context.

Switch to a macro which uses udelay instead of usleep to prevent the issue.

Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
---
 drivers/net/wireless/realtek/rtw88/fw.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw88/fw.c b/drivers/net/wireless/realtek/rtw88/fw.c
index 245da96dfddc..8f998b4a7234 100644
--- a/drivers/net/wireless/realtek/rtw88/fw.c
+++ b/drivers/net/wireless/realtek/rtw88/fw.c
@@ -228,9 +228,9 @@ static void rtw_fw_send_h2c_command(struct rtw_dev *rtwdev,
 		goto out;
 	}
 
-	ret = read_poll_timeout(rtw_read8, box_state,
-				!((box_state >> box) & 0x1), 100, 3000, false,
-				rtwdev, REG_HMETFR);
+	ret = read_poll_timeout_atomic(rtw_read8, box_state,
+				       !((box_state >> box) & 0x1), 100, 3000,
+				       false, rtwdev, REG_HMETFR);
 
 	if (ret) {
 		rtw_err(rtwdev, "failed to send h2c command\n");
-- 
2.17.1