Merge tag 'usb-for-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next

Felipe writes:

usb: changes for v4.15 merge window

Not much going on this time around. With only 51 non-merge commits,
this was one of the smallest pull requests from the Gadget tree.

Most of the changes are in the mtu3 driver which added support for
36-bit DMA, support for USB 3.1 and support for dual-role (along with
some non-critical fixes).

The dwc2 driver got a few improvements to how we handle gadget state
tracking and also added support for STM32F7xx devices.

Other than that, we just some minor non-critical fixes and
improvements all over the place.

42 files changed, 862 insertions, 367 deletions

diff --git a/Documentation/devicetree/bindings/usb/dwc2.txt b/Documentation/devicetree/bindings/usb/dwc2.txt
index fcf199b64d3d..e64d903bcbe8 100644
--- a/Documentation/devicetree/bindings/usb/dwc2.txt
+++ b/Documentation/devicetree/bindings/usb/dwc2.txt
@@ -19,6 +19,8 @@ Required properties:
   configured in FS mode;
   - "st,stm32f4x9-hsotg": The DWC2 USB HS controller instance in STM32F4x9 SoCs
   configured in HS mode;
+  - "st,stm32f7xx-hsotg": The DWC2 USB HS controller instance in STM32F7xx SoCs
+    configured in HS mode;
 - reg : Should contain 1 register range (address and length)
 - interrupts : Should contain 1 interrupt
 - clocks: clock provider specifier
diff --git a/Documentation/devicetree/bindings/usb/mediatek,mtu3.txt b/Documentation/devicetree/bindings/usb/mediatek,mtu3.txt
index 49f54767cd21..b2271d8e6b50 100644
--- a/Documentation/devicetree/bindings/usb/mediatek,mtu3.txt
+++ b/Documentation/devicetree/bindings/usb/mediatek,mtu3.txt
@@ -14,9 +14,9 @@ Required properties:
  - vusb33-supply : regulator of USB avdd3.3v
  - clocks : a list of phandle + clock-specifier pairs, one for each
 	entry in clock-names
- - clock-names : must contain "sys_ck" and "ref_ck" for clock of controller;
-	"wakeup_deb_p0" and "wakeup_deb_p1" are optional, they are
-	depends on "mediatek,enable-wakeup"
+ - clock-names : must contain "sys_ck" for clock of controller,
+	the following clocks are optional:
+	"ref_ck", "mcu_ck" and "dam_ck";
  - phys : a list of phandle + phy specifier pairs
  - dr_mode : should be one of "host", "peripheral" or "otg",
 	refer to usb/generic.txt
@@ -30,9 +30,10 @@ Optional properties:
 	when supports dual-role mode.
  - vbus-supply : reference to the VBUS regulator, needed when supports
 	dual-role mode.
- - pinctl-names : a pinctrl state named "default" must be defined,
-	"id_float" and "id_ground" are optinal which depends on
-	"mediatek,enable-manual-drd"
+ - pinctrl-names : a pinctrl state named "default" is optional, and need be
+	defined if auto drd switch is enabled, that means the property dr_mode
+	is set as "otg", and meanwhile the property "mediatek,enable-manual-drd"
+	is not set.
  - pinctrl-0 : pin control group
 	See: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
 
@@ -44,6 +45,8 @@ Optional properties:
  - mediatek,enable-wakeup : supports ip sleep wakeup used by host mode
  - mediatek,syscon-wakeup : phandle to syscon used to access USB wakeup
 	control register, it depends on "mediatek,enable-wakeup".
+ - mediatek,u3p-dis-msk : mask to disable u3ports, bit0 for u3port0,
+	bit1 for u3port1, ... etc;
 
 Sub-nodes:
 The xhci should be added as subnode to mtu3 as shown in the following example
@@ -63,9 +66,7 @@ ssusb: usb@11271000 {
 	clocks = <&topckgen CLK_TOP_USB30_SEL>, <&clk26m>,
 		 <&pericfg CLK_PERI_USB0>,
 		 <&pericfg CLK_PERI_USB1>;
-	clock-names = "sys_ck", "ref_ck",
-		      "wakeup_deb_p0",
-		      "wakeup_deb_p1";
+	clock-names = "sys_ck", "ref_ck";
 	vusb33-supply = <&mt6397_vusb_reg>;
 	vbus-supply = <&usb_p0_vbus>;
 	extcon = <&extcon_usb>;
diff --git a/Documentation/devicetree/bindings/usb/renesas_usb3.txt b/Documentation/devicetree/bindings/usb/renesas_usb3.txt
index e28025883b79..87a45e2f9b7f 100644
--- a/Documentation/devicetree/bindings/usb/renesas_usb3.txt
+++ b/Documentation/devicetree/bindings/usb/renesas_usb3.txt
@@ -15,6 +15,10 @@ Required properties:
   - interrupts: Interrupt specifier for the USB3.0 Peripheral
   - clocks: clock phandle and specifier pair
 
+Optional properties:
+  - phys: phandle + phy specifier pair
+  - phy-names: must be "usb"
+
 Example of R-Car H3 ES1.x:
 	usb3_peri0: usb@ee020000 {
 		compatible = "renesas,r8a7795-usb3-peri",
diff --git a/Documentation/devicetree/bindings/usb/renesas_usbhs.txt b/Documentation/devicetree/bindings/usb/renesas_usbhs.txt
index 9e18e000339e..47394ab788e3 100644
--- a/Documentation/devicetree/bindings/usb/renesas_usbhs.txt
+++ b/Documentation/devicetree/bindings/usb/renesas_usbhs.txt
@@ -3,6 +3,8 @@ Renesas Electronics USBHS driver
 Required properties:
   - compatible: Must contain one or more of the following:
 
+	- "renesas,usbhs-r8a7743" for r8a7743 (RZ/G1M) compatible device
+	- "renesas,usbhs-r8a7745" for r8a7745 (RZ/G1E) compatible device
 	- "renesas,usbhs-r8a7790" for r8a7790 (R-Car H2) compatible device
 	- "renesas,usbhs-r8a7791" for r8a7791 (R-Car M2-W) compatible device
 	- "renesas,usbhs-r8a7792" for r8a7792 (R-Car V2H) compatible device
@@ -10,7 +12,8 @@ Required properties:
 	- "renesas,usbhs-r8a7794" for r8a7794 (R-Car E2) compatible device
 	- "renesas,usbhs-r8a7795" for r8a7795 (R-Car H3) compatible device
 	- "renesas,usbhs-r8a7796" for r8a7796 (R-Car M3-W) compatible device
-	- "renesas,rcar-gen2-usbhs" for R-Car Gen2 compatible device
+	- "renesas,usbhs-r8a77995" for r8a77995 (R-Car D3) compatible device
+	- "renesas,rcar-gen2-usbhs" for R-Car Gen2 or RZ/G1 compatible devices
 	- "renesas,rcar-gen3-usbhs" for R-Car Gen3 compatible device
 
 	When compatible with the generic version, nodes must list the
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index 8367d4f985c1..730d7eb449bb 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -395,6 +395,9 @@ enum dwc2_ep0_state {
  *                           (default when phy_type is UTMI+ or ULPI)
  *                       1 - 6 MHz
  *                           (default when phy_type is Full Speed)
+ * @oc_disable:		Flag to disable overcurrent condition.
+ *			0 - Allow overcurrent condition to get detected
+ *			1 - Disable overcurrent condtion to get detected
  * @ts_dline:           Enable Term Select Dline pulsing
  *                       0 - No (default)
  *                       1 - Yes
@@ -492,6 +495,7 @@ struct dwc2_core_params {
 	bool dma_desc_fs_enable;
 	bool host_support_fs_ls_low_power;
 	bool host_ls_low_power_phy_clk;
+	bool oc_disable;
 
 	u8 host_channels;
 	u16 host_rx_fifo_size;
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 0d8e09ccb59c..603c21612051 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -3202,6 +3202,8 @@ void dwc2_hsotg_disconnect(struct dwc2_hsotg *hsotg)
 
 	call_gadget(hsotg, disconnect);
 	hsotg->lx_state = DWC2_L3;
+
+	usb_gadget_set_state(&hsotg->gadget, USB_STATE_NOTATTACHED);
 }
 
 /**
@@ -4004,6 +4006,11 @@ static int dwc2_hsotg_ep_disable(struct usb_ep *ep)
 		return -EINVAL;
 	}
 
+	if (hsotg->op_state != OTG_STATE_B_PERIPHERAL) {
+		dev_err(hsotg->dev, "%s: called in host mode?\n", __func__);
+		return -EINVAL;
+	}
+
 	epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index);
 
 	spin_lock_irqsave(&hsotg->lock, flags);
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index c2631145f404..e8fee0f969f0 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -213,6 +213,11 @@ static int dwc2_hs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
 		usbcfg &= ~(GUSBCFG_PHYIF16 | GUSBCFG_DDRSEL);
 		if (hsotg->params.phy_ulpi_ddr)
 			usbcfg |= GUSBCFG_DDRSEL;
+
+		/* Set external VBUS indicator as needed. */
+		if (hsotg->params.oc_disable)
+			usbcfg |= (GUSBCFG_ULPI_INT_VBUS_IND |
+				   GUSBCFG_INDICATORPASSTHROUGH);
 		break;
 	case DWC2_PHY_TYPE_PARAM_UTMI:
 		/* UTMI+ interface */
@@ -3277,7 +3282,6 @@ static void dwc2_conn_id_status_change(struct work_struct *work)
 		dwc2_core_init(hsotg, false);
 		dwc2_enable_global_interrupts(hsotg);
 		spin_lock_irqsave(&hsotg->lock, flags);
-		dwc2_hsotg_disconnect(hsotg);
 		dwc2_hsotg_core_init_disconnected(hsotg, false);
 		spin_unlock_irqrestore(&hsotg->lock, flags);
 		dwc2_hsotg_core_connect(hsotg);
@@ -3296,8 +3300,12 @@ host:
 		if (count > 250)
 			dev_err(hsotg->dev,
 				"Connection id status change timed out\n");
-		hsotg->op_state = OTG_STATE_A_HOST;
 
+		spin_lock_irqsave(&hsotg->lock, flags);
+		dwc2_hsotg_disconnect(hsotg);
+		spin_unlock_irqrestore(&hsotg->lock, flags);
+
+		hsotg->op_state = OTG_STATE_A_HOST;
 		/* Initialize the Core for Host mode */
 		dwc2_core_init(hsotg, false);
 		dwc2_enable_global_interrupts(hsotg);
diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
index a3ffe97170ff..fe770a2834d2 100644
--- a/drivers/usb/dwc2/params.c
+++ b/drivers/usb/dwc2/params.c
@@ -136,6 +136,15 @@ static void dwc2_set_stm32f4x9_fsotg_params(struct dwc2_hsotg *hsotg)
 	p->activate_stm_fs_transceiver = true;
 }
 
+static void dwc2_set_stm32f7xx_hsotg_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->host_rx_fifo_size = 622;
+	p->host_nperio_tx_fifo_size = 128;
+	p->host_perio_tx_fifo_size = 256;
+}
+
 const struct of_device_id dwc2_of_match_table[] = {
 	{ .compatible = "brcm,bcm2835-usb", .data = dwc2_set_bcm_params },
 	{ .compatible = "hisilicon,hi6220-usb", .data = dwc2_set_his_params  },
@@ -154,6 +163,8 @@ const struct of_device_id dwc2_of_match_table[] = {
 	{ .compatible = "st,stm32f4x9-fsotg",
 	  .data = dwc2_set_stm32f4x9_fsotg_params },
 	{ .compatible = "st,stm32f4x9-hsotg" },
+	{ .compatible = "st,stm32f7xx-hsotg",
+	  .data = dwc2_set_stm32f7xx_hsotg_params },
 	{},
 };
 MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
@@ -335,6 +346,9 @@ static void dwc2_get_device_properties(struct dwc2_hsotg *hsotg)
 						       num);
 		}
 	}
+
+	if (of_find_property(hsotg->dev->of_node, "disable-over-current", NULL))
+		p->oc_disable = true;
 }
 
 static void dwc2_check_param_otg_cap(struct dwc2_hsotg *hsotg)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 03474d3575ab..dabfa16fa267 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -156,9 +156,8 @@ static void __dwc3_set_mode(struct work_struct *work)
 		} else {
 			if (dwc->usb2_phy)
 				otg_set_vbus(dwc->usb2_phy->otg, true);
-			if (dwc->usb2_generic_phy)
-				phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
-
+			phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
+			phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST);
 		}
 		break;
 	case DWC3_GCTL_PRTCAP_DEVICE:
@@ -166,8 +165,8 @@ static void __dwc3_set_mode(struct work_struct *work)
 
 		if (dwc->usb2_phy)
 			otg_set_vbus(dwc->usb2_phy->otg, false);
-		if (dwc->usb2_generic_phy)
-			phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
+		phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
+		phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE);
 
 		ret = dwc3_gadget_init(dwc);
 		if (ret)
@@ -927,12 +926,13 @@ static int dwc3_core_init_mode(struct dwc3 *dwc)
 
 	switch (dwc->dr_mode) {
 	case USB_DR_MODE_PERIPHERAL:
+		dwc->current_dr_role = DWC3_GCTL_PRTCAP_DEVICE;
 		dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE);
 
 		if (dwc->usb2_phy)
 			otg_set_vbus(dwc->usb2_phy->otg, false);
-		if (dwc->usb2_generic_phy)
-			phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
+		phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
+		phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE);
 
 		ret = dwc3_gadget_init(dwc);
 		if (ret) {
@@ -942,12 +942,13 @@ static int dwc3_core_init_mode(struct dwc3 *dwc)
 		}
 		break;
 	case USB_DR_MODE_HOST:
+		dwc->current_dr_role = DWC3_GCTL_PRTCAP_HOST;
 		dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST);
 
 		if (dwc->usb2_phy)
 			otg_set_vbus(dwc->usb2_phy->otg, true);
-		if (dwc->usb2_generic_phy)
-			phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
+		phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
+		phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST);
 
 		ret = dwc3_host_init(dwc);
 		if (ret) {
@@ -1293,21 +1294,19 @@ static int dwc3_suspend_common(struct dwc3 *dwc)
 {
 	unsigned long	flags;
 
-	switch (dwc->dr_mode) {
-	case USB_DR_MODE_PERIPHERAL:
-	case USB_DR_MODE_OTG:
+	switch (dwc->current_dr_role) {
+	case DWC3_GCTL_PRTCAP_DEVICE:
 		spin_lock_irqsave(&dwc->lock, flags);
 		dwc3_gadget_suspend(dwc);
 		spin_unlock_irqrestore(&dwc->lock, flags);
+		dwc3_core_exit(dwc);
 		break;
-	case USB_DR_MODE_HOST:
+	case DWC3_GCTL_PRTCAP_HOST:
 	default:
 		/* do nothing */
 		break;
 	}
 
-	dwc3_core_exit(dwc);
-
 	return 0;
 }
 
@@ -1316,18 +1315,17 @@ static int dwc3_resume_common(struct dwc3 *dwc)
 	unsigned long	flags;
 	int		ret;
 
-	ret = dwc3_core_init(dwc);
-	if (ret)
-		return ret;
+	switch (dwc->current_dr_role) {
+	case DWC3_GCTL_PRTCAP_DEVICE:
+		ret = dwc3_core_init(dwc);
+		if (ret)
+			return ret;
 
-	switch (dwc->dr_mode) {
-	case USB_DR_MODE_PERIPHERAL:
-	case USB_DR_MODE_OTG:
 		spin_lock_irqsave(&dwc->lock, flags);
 		dwc3_gadget_resume(dwc);
 		spin_unlock_irqrestore(&dwc->lock, flags);
-		/* FALLTHROUGH */
-	case USB_DR_MODE_HOST:
+		break;
+	case DWC3_GCTL_PRTCAP_HOST:
 	default:
 		/* do nothing */
 		break;
@@ -1338,7 +1336,7 @@ static int dwc3_resume_common(struct dwc3 *dwc)
 
 static int dwc3_runtime_checks(struct dwc3 *dwc)
 {
-	switch (dwc->dr_mode) {
+	switch (dwc->current_dr_role) {
 	case USB_DR_MODE_PERIPHERAL:
 	case USB_DR_MODE_OTG:
 		if (dwc->connected)
@@ -1381,19 +1379,17 @@ static int dwc3_runtime_resume(struct device *dev)
 	if (ret)
 		return ret;
 
-	switch (dwc->dr_mode) {
-	case USB_DR_MODE_PERIPHERAL:
-	case USB_DR_MODE_OTG:
+	switch (dwc->current_dr_role) {
+	case DWC3_GCTL_PRTCAP_DEVICE:
 		dwc3_gadget_process_pending_events(dwc);
 		break;
-	case USB_DR_MODE_HOST:
+	case DWC3_GCTL_PRTCAP_HOST:
 	default:
 		/* do nothing */
 		break;
 	}
 
 	pm_runtime_mark_last_busy(dev);
-	pm_runtime_put(dev);
 
 	return 0;
 }
@@ -1402,13 +1398,12 @@ static int dwc3_runtime_idle(struct device *dev)
 {
 	struct dwc3     *dwc = dev_get_drvdata(dev);
 
-	switch (dwc->dr_mode) {
-	case USB_DR_MODE_PERIPHERAL:
-	case USB_DR_MODE_OTG:
+	switch (dwc->current_dr_role) {
+	case DWC3_GCTL_PRTCAP_DEVICE:
 		if (dwc3_runtime_checks(dwc))
 			return -EBUSY;
 		break;
-	case USB_DR_MODE_HOST:
+	case DWC3_GCTL_PRTCAP_HOST:
 	default:
 		/* do nothing */
 		break;
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index ea910acb4bb0..e33cc10121be 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -529,6 +529,7 @@ struct dwc3_event_buffer {
  * @number: endpoint number (1 - 15)
  * @type: set to bmAttributes & USB_ENDPOINT_XFERTYPE_MASK
  * @resource_index: Resource transfer index
+ * @frame_number: set to the frame number we want this transfer to start (ISOC)
  * @interval: the interval on which the ISOC transfer is started
  * @allocated_requests: number of requests allocated
  * @queued_requests: number of requests queued for transfer
@@ -581,6 +582,7 @@ struct dwc3_ep {
 	u8			resource_index;
 	u32			allocated_requests;
 	u32			queued_requests;
+	u32			frame_number;
 	u32			interval;
 
 	char			name[20];
diff --git a/drivers/usb/dwc3/dwc3-of-simple.c b/drivers/usb/dwc3/dwc3-of-simple.c
index a26d1fde0f5e..ceea1619f8aa 100644
--- a/drivers/usb/dwc3/dwc3-of-simple.c
+++ b/drivers/usb/dwc3/dwc3-of-simple.c
@@ -28,11 +28,13 @@
 #include <linux/of.h>
 #include <linux/of_platform.h>
 #include <linux/pm_runtime.h>
+#include <linux/reset.h>
 
 struct dwc3_of_simple {
 	struct device		*dev;
 	struct clk		**clks;
 	int			num_clocks;
+	struct reset_control	*resets;
 };
 
 static int dwc3_of_simple_clk_init(struct dwc3_of_simple *simple, int count)
@@ -95,10 +97,21 @@ static int dwc3_of_simple_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, simple);
 	simple->dev = dev;
 
+	simple->resets = of_reset_control_array_get_optional_exclusive(np);
+	if (IS_ERR(simple->resets)) {
+		ret = PTR_ERR(simple->resets);
+		dev_err(dev, "failed to get device resets, err=%d\n", ret);
+		return ret;
+	}
+
+	ret = reset_control_deassert(simple->resets);
+	if (ret)
+		goto err_resetc_put;
+
 	ret = dwc3_of_simple_clk_init(simple, of_count_phandle_with_args(np,
 						"clocks", "#clock-cells"));
 	if (ret)
-		return ret;
+		goto err_resetc_assert;
 
 	ret = of_platform_populate(np, NULL, NULL, dev);
 	if (ret) {
@@ -107,7 +120,7 @@ static int dwc3_of_simple_probe(struct platform_device *pdev)
 			clk_put(simple->clks[i]);
 		}
 
-		return ret;
+		goto err_resetc_assert;
 	}
 
 	pm_runtime_set_active(dev);
@@ -115,6 +128,13 @@ static int dwc3_of_simple_probe(struct platform_device *pdev)
 	pm_runtime_get_sync(dev);
 
 	return 0;
+
+err_resetc_assert:
+	reset_control_assert(simple->resets);
+
+err_resetc_put:
+	reset_control_put(simple->resets);
+	return ret;
 }
 
 static int dwc3_of_simple_remove(struct platform_device *pdev)
@@ -123,12 +143,15 @@ static int dwc3_of_simple_remove(struct platform_device *pdev)
 	struct device		*dev = &pdev->dev;
 	int			i;
 
+	of_platform_depopulate(dev);
+
 	for (i = 0; i < simple->num_clocks; i++) {
 		clk_disable_unprepare(simple->clks[i]);
 		clk_put(simple->clks[i]);
 	}
 
-	of_platform_depopulate(dev);
+	reset_control_assert(simple->resets);
+	reset_control_put(simple->resets);
 
 	pm_runtime_put_sync(dev);
 	pm_runtime_disable(dev);
diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
index 54343fbd85ee..261ee805763f 100644
--- a/drivers/usb/dwc3/dwc3-pci.c
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -20,6 +20,7 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/pci.h>
+#include <linux/workqueue.h>
 #include <linux/pm_runtime.h>
 #include <linux/platform_device.h>
 #include <linux/gpio/consumer.h>
@@ -61,6 +62,7 @@ struct dwc3_pci {
 	guid_t guid;
 
 	unsigned int has_dsm_for_pm:1;
+	struct work_struct wakeup_work;
 };
 
 static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
@@ -174,6 +176,22 @@ static int dwc3_pci_quirks(struct dwc3_pci *dwc)
 	return 0;
 }
 
+#ifdef CONFIG_PM
+static void dwc3_pci_resume_work(struct work_struct *work)
+{
+	struct dwc3_pci *dwc = container_of(work, struct dwc3_pci, wakeup_work);
+	struct platform_device *dwc3 = dwc->dwc3;
+	int ret;
+
+	ret = pm_runtime_get_sync(&dwc3->dev);
+	if (ret)
+		return;
+
+	pm_runtime_mark_last_busy(&dwc3->dev);
+	pm_runtime_put_sync_autosuspend(&dwc3->dev);
+}
+#endif
+
 static int dwc3_pci_probe(struct pci_dev *pci,
 		const struct pci_device_id *id)
 {
@@ -232,6 +250,9 @@ static int dwc3_pci_probe(struct pci_dev *pci,
 	device_init_wakeup(dev, true);
 	pci_set_drvdata(pci, dwc);
 	pm_runtime_put(dev);
+#ifdef CONFIG_PM
+	INIT_WORK(&dwc->wakeup_work, dwc3_pci_resume_work);
+#endif
 
 	return 0;
 err:
@@ -243,6 +264,9 @@ static void dwc3_pci_remove(struct pci_dev *pci)
 {
 	struct dwc3_pci		*dwc = pci_get_drvdata(pci);
 
+#ifdef CONFIG_PM
+	cancel_work_sync(&dwc->wakeup_work);
+#endif
 	device_init_wakeup(&pci->dev, false);
 	pm_runtime_get(&pci->dev);
 	platform_device_unregister(dwc->dwc3);
@@ -318,14 +342,15 @@ static int dwc3_pci_runtime_suspend(struct device *dev)
 static int dwc3_pci_runtime_resume(struct device *dev)
 {
 	struct dwc3_pci		*dwc = dev_get_drvdata(dev);
-	struct platform_device	*dwc3 = dwc->dwc3;
 	int			ret;
 
 	ret = dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0);
 	if (ret)
 		return ret;
 
-	return pm_runtime_get(&dwc3->dev);
+	queue_work(pm_wq, &dwc->wakeup_work);
+
+	return 0;
 }
 #endif /* CONFIG_PM */
 
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 75e6cb044eb2..a4dceae4bdc7 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -487,14 +487,10 @@ static int dwc3_ep0_handle_device(struct dwc3 *dwc,
 static int dwc3_ep0_handle_intf(struct dwc3 *dwc,
 		struct usb_ctrlrequest *ctrl, int set)
 {
-	enum usb_device_state	state;
 	u32			wValue;
-	u32			wIndex;
 	int			ret = 0;
 
 	wValue = le16_to_cpu(ctrl->wValue);
-	wIndex = le16_to_cpu(ctrl->wIndex);
-	state = dwc->gadget.state;
 
 	switch (wValue) {
 	case USB_INTRF_FUNC_SUSPEND:
@@ -517,14 +513,10 @@ static int dwc3_ep0_handle_endpoint(struct dwc3 *dwc,
 		struct usb_ctrlrequest *ctrl, int set)
 {
 	struct dwc3_ep		*dep;
-	enum usb_device_state	state;
 	u32			wValue;
-	u32			wIndex;
 	int			ret;
 
 	wValue = le16_to_cpu(ctrl->wValue);
-	wIndex = le16_to_cpu(ctrl->wIndex);
-	state = dwc->gadget.state;
 
 	switch (wValue) {
 	case USB_ENDPOINT_HALT:
@@ -551,10 +543,8 @@ static int dwc3_ep0_handle_feature(struct dwc3 *dwc,
 {
 	u32			recip;
 	int			ret;
-	enum usb_device_state	state;
 
 	recip = ctrl->bRequestType & USB_RECIP_MASK;
-	state = dwc->gadget.state;
 
 	switch (recip) {
 	case USB_RECIP_DEVICE:
@@ -712,12 +702,10 @@ static int dwc3_ep0_set_sel(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
 	struct dwc3_ep	*dep;
 	enum usb_device_state state = dwc->gadget.state;
 	u16		wLength;
-	u16		wValue;
 
 	if (state == USB_STATE_DEFAULT)
 		return -EINVAL;
 
-	wValue = le16_to_cpu(ctrl->wValue);
 	wLength = le16_to_cpu(ctrl->wLength);
 
 	if (wLength != 6) {
@@ -842,9 +830,6 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc,
 	struct usb_request	*ur;
 	struct dwc3_trb		*trb;
 	struct dwc3_ep		*ep0;
-	unsigned		maxp;
-	unsigned		remaining_ur_length;
-	void			*buf;
 	u32			transferred = 0;
 	u32			status;
 	u32			length;
@@ -871,11 +856,8 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc,
 	}
 
 	ur = &r->request;
-	buf = ur->buf;
-	remaining_ur_length = ur->length;
 
 	length = trb->size & DWC3_TRB_SIZE_MASK;
-	maxp = ep0->endpoint.maxpacket;
 	transferred = ur->length - length;
 	ur->actual += transferred;
 
@@ -1001,7 +983,6 @@ static void __dwc3_ep0_do_control_data(struct dwc3 *dwc,
 	} else if (IS_ALIGNED(req->request.length, dep->endpoint.maxpacket) &&
 		   req->request.length && req->request.zero) {
 		u32	maxpacket;
-		u32	rem;
 
 		ret = usb_gadget_map_request_by_dev(dwc->sysdev,
 				&req->request, dep->number);
@@ -1009,7 +990,6 @@ static void __dwc3_ep0_do_control_data(struct dwc3 *dwc,
 			return;
 
 		maxpacket = dep->endpoint.maxpacket;
-		rem = req->request.length % maxpacket;
 
 		/* prepare normal TRB */
 		dwc3_ep0_prepare_one_trb(dep, req->request.dma,
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index f064f1549333..66dc99b9525a 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1151,9 +1151,6 @@ static void dwc3_prepare_trbs(struct dwc3_ep *dep)