From: Peter Chen <peter.chen@nxp.com>
Date: Tue, 1 Sep 2020 02:33:50 +0000 (+0800)
Subject: usb: cdns3: gadget: clear the interrupt status when disconnect the host
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=0eeda059956d57b16143cc1dd0aed7e5fc383d5d;p=linux.git

usb: cdns3: gadget: clear the interrupt status when disconnect the host

It is meaningless to handle any interrupts after disconnecting
with host

Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
---

diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c
index 081447bf73134..4c939dad9c339 100644
--- a/drivers/usb/cdns3/gadget.c
+++ b/drivers/usb/cdns3/gadget.c
@@ -2739,10 +2739,13 @@ static int cdns3_gadget_pullup(struct usb_gadget *gadget, int is_on)
 {
 	struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
 
-	if (is_on)
+	if (is_on) {
 		writel(USB_CONF_DEVEN, &priv_dev->regs->usb_conf);
-	else
+	} else {
+		writel(~0, &priv_dev->regs->ep_ists);
+		writel(~0, &priv_dev->regs->usb_ists);
 		writel(USB_CONF_DEVDS, &priv_dev->regs->usb_conf);
+	}
 
 	return 0;
 }