openwrt/target/linux/bcm53xx/patches-4.3/190-usb-xhci-plat-fix-adding-usb3-lpm-capable-quirk.patch

From 1420e53fc88673683f8990aa5342e7b2640ce165 Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Sun, 18 Oct 2015 19:13:27 +0200
Subject: [PATCH v3 1/6] usb: xhci: plat: fix adding usb3-lpm-capable quirk

The xhci->quirks member is overwritten in xhci_gen_setup() with the
quirks given through the module load parameter. Without this patch the
usb3-lpm-capable quirk will be over written before it gets used. This
patch moves the quirks code to the xhci_plat_quirks() callback function
which gets called directly after the quirks member variable is
overwritten with the module load parameter.

I do not have any hardware which is using usb3-lpm-capabls so I can not
test this on real hardware.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
 drivers/usb/host/xhci-plat.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -37,12 +37,20 @@ static const struct xhci_driver_override
 
 static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
 {
+	struct platform_device	*pdev = to_platform_device(dev);
+	struct device_node	*node = pdev->dev.of_node;
+	struct usb_xhci_pdata	*pdata = dev_get_platdata(&pdev->dev);
+
 	/*
 	 * As of now platform drivers don't provide MSI support so we ensure
 	 * here that the generic code does not try to make a pci_dev from our
 	 * dev struct in order to setup MSI
 	 */
 	xhci->quirks |= XHCI_PLAT;
+
+	if ((node && of_property_read_bool(node, "usb3-lpm-capable")) ||
+			(pdata && pdata->usb3_lpm_capable))
+		xhci->quirks |= XHCI_LPM_SUPPORT;
 }
 
 /* called during probe() after chip reset completes */
@@ -74,8 +82,6 @@ static int xhci_plat_start(struct usb_hc
 
 static int xhci_plat_probe(struct platform_device *pdev)
 {
-	struct device_node	*node = pdev->dev.of_node;
-	struct usb_xhci_pdata	*pdata = dev_get_platdata(&pdev->dev);
 	const struct hc_driver	*driver;
 	struct xhci_hcd		*xhci;
 	struct resource         *res;
@@ -148,10 +154,6 @@ static int xhci_plat_probe(struct platfo
 		goto disable_clk;
 	}
 
-	if ((node && of_property_read_bool(node, "usb3-lpm-capable")) ||
-			(pdata && pdata->usb3_lpm_capable))
-		xhci->quirks |= XHCI_LPM_SUPPORT;
-
 	if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
 		xhci->shared_hcd->can_do_streams = 1;