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From:   Wesley Cheng <quic_wcheng@quicinc.com>
To:     <balbi@kernel.org>, <gregkh@linuxfoundation.org>
CC:     <linux-kernel@vger.kernel.org>, <linux-usb@vger.kernel.org>,
        <Thinh.Nguyen@synopsys.com>, <quic_jackp@quicinc.com>,
        Wesley Cheng <quic_wcheng@quicinc.com>
Subject: [PATCH 5/5] usb: dwc3: gadget: Increase DWC3 controller halt timeout
Date:   Fri, 8 Jul 2022 11:50:07 -0700
Message-ID: <20220708185007.21743-6-quic_wcheng@quicinc.com>
In-Reply-To: <20220708185007.21743-1-quic_wcheng@quicinc.com>
References: <20220708185007.21743-1-quic_wcheng@quicinc.com>
MIME-Version: 1.0
Content-Type: text/plain
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Since EP0 transactions need to be completed before the controller halt
sequence is finished, this may take some time depending on the host and the
enabled functions.  Increase the controller halt timeout, so that we give
the controller sufficient time to handle EP0 transfers.

Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com>
---
 drivers/usb/dwc3/gadget.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index fba2797ad9ae..a5c0e39bd002 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2487,6 +2487,7 @@ static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend)
 	do {
 		reg = dwc3_readl(dwc->regs, DWC3_DSTS);
 		reg &= DWC3_DSTS_DEVCTRLHLT;
+		msleep(1);
 	} while (--timeout && !(!is_on ^ !reg));
 
 	if (!timeout)