linux-kernel - [PATCH] usb: cdns3: gadget: reset EP

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Date:   Tue, 29 Oct 2019 12:24:41 +0000
From:   Sanket Parmar <sparmar@...ence.com>
To:     <gregkh@...uxfoundation.org>, <felipe.balbi@...ux.intel.com>
CC:     <sparmar@...ence.com>, <pawell@...ence.com>,
        <linux-usb@...r.kernel.org>, <rogerq@...com>,
        <linux-kernel@...r.kernel.org>, <kurahul@...ence.com>,
        <peter.chen@....com>, <nsekhar@...com>
Subject: [PATCH] usb: cdns3: gadget: reset EP_CLAIMED flag while unloading

EP_CLAIMED flag is used to track the claimed endpoints. While unloading the
module, Reset EP_CLAIMED flag for all enabled endpoints. So that it can be
reused.

Signed-off-by: Sanket Parmar <sparmar@...ence.com>
---
Hi Greg/Felipe,

This can be used for -rc as it is bug fix.

Regards,
Sanket

 drivers/usb/cdns3/gadget.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c
index 9050b380ab83..2fb78322ed3c 100644
--- a/drivers/usb/cdns3/gadget.c
+++ b/drivers/usb/cdns3/gadget.c
@@ -2381,6 +2381,8 @@ static int cdns3_gadget_udc_stop(struct usb_gadget *gadget)
 		writel(EP_CMD_EPRST, &priv_dev->regs->ep_cmd);
 		readl_poll_timeout_atomic(&priv_dev->regs->ep_cmd, val,
 					  !(val & EP_CMD_EPRST), 1, 100);
+
+		priv_ep->flags &= ~EP_CLAIMED;
 	}
 
 	/* disable interrupt for device */
-- 
2.17.1