Patch "usb: gadget: dummy_hcd: Fix wrong power status bit clear/reset in dummy_hub_control()" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

usb: gadget: dummy_hcd: Fix wrong power status bit clear/reset in dummy_hub_control()

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
usb-gadget-dummy_hcd-fix-wrong-power-status-bit-clear-reset-in-dummy_hub_control.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Yuyang Du <[email protected]>
Date: Fri, 24 Mar 2017 04:06:11 +0800
Subject: usb: gadget: dummy_hcd: Fix wrong power status bit clear/reset in dummy_hub_control()

From: Yuyang Du <[email protected]>

[ Upstream commit 9f20dfb44d03745d0d3cef2ffb3abf8d8024fa61 ]

This fixes the commit: 1cd8fd2887e1 ("usb: gadget: dummy_hcd: add SuperSpeed support").

In the case of ClearPortFeature and USB_PORT_FEAT_POWER, simply clear the right bit regardless of what the wValue is.

---
 drivers/usb/gadget/udc/dummy_hcd.c |   20 ++++++++------------
 1 file changed, 8 insertions(+), 12 deletions(-)

@@ -2103,16 +2103,13 @@ static int dummy_hub_control(
 			}
 			break;
 		case USB_PORT_FEAT_POWER:
-			if (hcd->speed == HCD_USB3) {
-				if (dum_hcd->port_status & USB_PORT_STAT_POWER)
-					dev_dbg(dummy_dev(dum_hcd),
-						"power-off\n");
-			} else
-				if (dum_hcd->port_status &
-							USB_SS_PORT_STAT_POWER)
-					dev_dbg(dummy_dev(dum_hcd),
-						"power-off\n");
-			/* FALLS THROUGH */
+			dev_dbg(dummy_dev(dum_hcd), "power-off\n");
+			if (hcd->speed == HCD_USB3)
+				dum_hcd->port_status &= ~USB_SS_PORT_STAT_POWER;
+			else
+				dum_hcd->port_status &= ~USB_PORT_STAT_POWER;
+			set_link_state(dum_hcd);
+			break;
 		default:
 			dum_hcd->port_status &= ~(1 << wValue);
 			set_link_state(dum_hcd);

@@ -2283,14 +2280,13 @@ static int dummy_hub_control(
 				if ((dum_hcd->port_status &
 				     USB_SS_PORT_STAT_POWER) != 0) {
 					dum_hcd->port_status |= (1 << wValue);
-					set_link_state(dum_hcd);
 				}
 			} else
 				if ((dum_hcd->port_status &
 				     USB_PORT_STAT_POWER) != 0) {
 					dum_hcd->port_status |= (1 << wValue);
-					set_link_state(dum_hcd);
 				}
+			set_link_state(dum_hcd);
 		}
 		break;
 	case GetPortErrorCount:

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/usb-gadget-dummy_hcd-fix-wrong-power-status-bit-clear-reset-in-dummy_hub_control.patch