From: Gregory Herrero <gregory.herrero@intel.com>
Date: Tue, 22 Sep 2015 13:16:46 +0000 (+0200)
Subject: usb: dwc2: host: disconnect hcd prior stopping it
X-Git-Tag: firefly_0821_release~176^2~804^2~12^2~65
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=091473ad9b402f9e1b08a68a78b54e0d3c9affb6;p=firefly-linux-kernel-4.4.55.git

usb: dwc2: host: disconnect hcd prior stopping it

In case controller is asked to stop while devices are connected,
disconnect all devices and clean up before stopping.

Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: John Youn <johnyoun@synopsys.com>
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---

diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index 856e21cb6683..257f9579705d 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -2350,7 +2350,12 @@ static void _dwc2_hcd_stop(struct usb_hcd *hcd)
 	struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
 	unsigned long flags;
 
+	/* Wait for interrupt processing to finish */
+	synchronize_irq(hcd->irq);
+
 	spin_lock_irqsave(&hsotg->lock, flags);
+	/* Ensure hcd is disconnected */
+	dwc2_hcd_disconnect(hsotg);
 	dwc2_hcd_stop(hsotg);
 	hsotg->lx_state = DWC2_L3;
 	hcd->state = HC_STATE_HALT;