[PATCH 3.18 36/68] usb: gadget: dummy_hcd: Fix wrong power status bit clear/reset in dummy_hub_control()
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2018-03-19 18:06:14
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3.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Yuyang Du <redacted>
[ 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@rowland.harvard.edu>
Signed-off-by: Yuyang Du <redacted>
Signed-off-by: Felipe Balbi <redacted>
Signed-off-by: Sasha Levin <redacted>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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@@ -2001,16 +2001,13 @@ 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);
@@ -2181,14 +2178,13 @@ 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: