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Date:   Tue, 22 Aug 2017 17:14:47 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     mathias.nyman@...el.com
Cc:     gregkh@...uxfoundation.org, Lars_Chang@...edia.com.tw,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Kai-Heng Feng <kai.heng.feng@...onical.com>
Subject: [PATCH] Revert "xhci: Limit USB2 port wake support for AMD Promontory hosts"

This reverts commit dec08194ffeccfa1cf085906b53d301930eae18f.

Commit dec08194ffec ("xhci: Limit USB2 port wake support for AMD Promontory
hosts") makes all high speed USB ports on ASUS PRIME B350M-A cease to
function after enabling runtime PM.

All boards with this chipsets will be affected, so revert the commit.

Conflicts:
	drivers/usb/host/xhci-pci.c
	drivers/usb/host/xhci.h

Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
---
 drivers/usb/host/xhci-hub.c |  3 ---
 drivers/usb/host/xhci-pci.c | 12 ------------
 drivers/usb/host/xhci.h     |  2 +-
 3 files changed, 1 insertion(+), 16 deletions(-)

diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 00721e8807ab..4bd8654b1233 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -1473,9 +1473,6 @@ int xhci_bus_suspend(struct usb_hcd *hcd)
 				t2 |= PORT_WKOC_E | PORT_WKCONN_E;
 				t2 &= ~PORT_WKDISC_E;
 			}
-			if ((xhci->quirks & XHCI_U2_DISABLE_WAKE) &&
-			    (hcd->speed < HCD_USB3))
-				t2 &= ~PORT_WAKE_BITS;
 		} else
 			t2 &= ~PORT_WAKE_BITS;
 
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 8071c8fdd15e..76f392954733 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -54,11 +54,6 @@
 #define PCI_DEVICE_ID_INTEL_APL_XHCI			0x5aa8
 #define PCI_DEVICE_ID_INTEL_DNV_XHCI			0x19d0
 
-#define PCI_DEVICE_ID_AMD_PROMONTORYA_4			0x43b9
-#define PCI_DEVICE_ID_AMD_PROMONTORYA_3			0x43ba
-#define PCI_DEVICE_ID_AMD_PROMONTORYA_2			0x43bb
-#define PCI_DEVICE_ID_AMD_PROMONTORYA_1			0x43bc
-
 #define PCI_DEVICE_ID_ASMEDIA_1042A_XHCI		0x1142
 
 static const char hcd_name[] = "xhci_hcd";
@@ -142,13 +137,6 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
 	if (pdev->vendor == PCI_VENDOR_ID_AMD)
 		xhci->quirks |= XHCI_TRUST_TX_LENGTH;
 
-	if ((pdev->vendor == PCI_VENDOR_ID_AMD) &&
-		((pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_4) ||
-		(pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_3) ||
-		(pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_2) ||
-		(pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_1)))
-		xhci->quirks |= XHCI_U2_DISABLE_WAKE;
-
 	if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
 		xhci->quirks |= XHCI_LPM_SUPPORT;
 		xhci->quirks |= XHCI_INTEL_HOST;
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index e3e935291ed6..d6b471823a0b 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1819,7 +1819,7 @@ struct xhci_hcd {
 /* For controller with a broken Port Disable implementation */
 #define XHCI_BROKEN_PORT_PED	(1 << 25)
 #define XHCI_LIMIT_ENDPOINT_INTERVAL_7	(1 << 26)
-#define XHCI_U2_DISABLE_WAKE	(1 << 27)
+/* Reserved. It was XHCI_U2_DISABLE_WAKE */
 #define XHCI_ASMEDIA_MODIFY_FLOWCONTROL	(1 << 28)
 
 	unsigned int		num_active_eps;
-- 
2.14.1

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