linux-kernel - [RFC PATCH v3 3/5] usb: xhci-mtk: fix random remote wakeup

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Message-ID: <1608629682-8535-3-git-send-email-chunfeng.yun@mediatek.com>
Date:   Tue, 22 Dec 2020 17:34:40 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     Ikjoon Jang <ikjn@...omium.org>
CC:     Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Tianping Fang <tianping.fang@...iatek.com>,
        Zhanyong Wang <zhangyong.wang@...iatek.com>,
        <linux-mediatek@...ts.infradead.org>, <linux-usb@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [RFC PATCH v3 3/5] usb: xhci-mtk: fix random remote wakeup

Wakeup_signal will toggle status according to ssusb_ip_sleep
signal after debounc time, add a delay time to avoid spurious
wakeup event.

Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
---
v3: new patch
---
 drivers/usb/host/xhci-mtk.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index 565ce4c16206..34bd3de090b1 100755
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -172,7 +172,10 @@ static int xhci_mtk_host_disable(struct xhci_hcd_mtk *mtk)
 	if (ret) {
 		dev_err(mtk->dev, "ip sleep failed!!!\n");
 		return ret;
+	} else {
+		usleep_range(200, 250);
 	}
+
 	return 0;
 }
 
-- 
2.18.0