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 <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Sun Mar 18 16:55:33 CET 2018 From: Yuyang Du <yuyang.du@xxxxxxxxx> 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 <yuyang.du@xxxxxxxxx> [ 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. Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Yuyang Du <yuyang.du@xxxxxxxxx> Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/usb/gadget/udc/dummy_hcd.c | 20 ++++++++------------ 1 file changed, 8 insertions(+), 12 deletions(-) --- a/drivers/usb/gadget/udc/dummy_hcd.c +++ b/drivers/usb/gadget/udc/dummy_hcd.c @@ -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 yuyang.du@xxxxxxxxx are queue-4.9/usb-gadget-dummy_hcd-fix-wrong-power-status-bit-clear-reset-in-dummy_hub_control.patch