7 files changed, 142 insertions, 140 deletions

diff --git a/drivers/usb/gadget/udc/aspeed-vhub/epn.c b/drivers/usb/gadget/udc/aspeed-vhub/epn.c
index 83340f4fdc6e..35941dc125f9 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/epn.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/epn.c
@@ -593,10 +593,6 @@ static int ast_vhub_epn_disable(struct usb_ep* u_ep)
 static int ast_vhub_epn_enable(struct usb_ep* u_ep,
 			       const struct usb_endpoint_descriptor *desc)
 {
-	static const char *ep_type_string[] __maybe_unused = { "ctrl",
-							       "isoc",
-							       "bulk",
-							       "intr" };
 	struct ast_vhub_ep *ep = to_ast_ep(u_ep);
 	struct ast_vhub_dev *dev;
 	struct ast_vhub *vhub;
@@ -646,7 +642,7 @@ static int ast_vhub_epn_enable(struct usb_ep* u_ep,
 	ep->epn.wedged = false;
 
 	EPDBG(ep, "Enabling [%s] %s num %d maxpacket=%d\n",
-	      ep->epn.is_in ? "in" : "out", ep_type_string[type],
+	      ep->epn.is_in ? "in" : "out", usb_ep_type_string(type),
 	      usb_endpoint_num(desc), maxpacket);
 
 	/* Can we use DMA descriptor mode ? */
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index 660712e0bf98..503d275bc4c4 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -358,8 +358,20 @@ static inline u32 usba_int_enb_get(struct usba_udc *udc)
 	return udc->int_enb_cache;
 }
 
-static inline void usba_int_enb_set(struct usba_udc *udc, u32 val)
+static inline void usba_int_enb_set(struct usba_udc *udc, u32 mask)
 {
+	u32 val;
+
+	val = udc->int_enb_cache | mask;
+	usba_writel(udc, INT_ENB, val);
+	udc->int_enb_cache = val;
+}
+
+static inline void usba_int_enb_clear(struct usba_udc *udc, u32 mask)
+{
+	u32 val;
+
+	val = udc->int_enb_cache & ~mask;
 	usba_writel(udc, INT_ENB, val);
 	udc->int_enb_cache = val;
 }
@@ -629,14 +641,12 @@ usba_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 	if (ep->can_dma) {
 		u32 ctrl;
 
-		usba_int_enb_set(udc, usba_int_enb_get(udc) |
-				      USBA_BF(EPT_INT, 1 << ep->index) |
+		usba_int_enb_set(udc, USBA_BF(EPT_INT, 1 << ep->index) |
 				      USBA_BF(DMA_INT, 1 << ep->index));
 		ctrl = USBA_AUTO_VALID | USBA_INTDIS_DMA;
 		usba_ep_writel(ep, CTL_ENB, ctrl);
 	} else {
-		usba_int_enb_set(udc, usba_int_enb_get(udc) |
-				      USBA_BF(EPT_INT, 1 << ep->index));
+		usba_int_enb_set(udc, USBA_BF(EPT_INT, 1 << ep->index));
 	}
 
 	spin_unlock_irqrestore(&udc->lock, flags);
@@ -680,8 +690,7 @@ static int usba_ep_disable(struct usb_ep *_ep)
 		usba_dma_readl(ep, STATUS);
 	}
 	usba_ep_writel(ep, CTL_DIS, USBA_EPT_ENABLE);
-	usba_int_enb_set(udc, usba_int_enb_get(udc) &
-			      ~USBA_BF(EPT_INT, 1 << ep->index));
+	usba_int_enb_clear(udc, USBA_BF(EPT_INT, 1 << ep->index));
 
 	request_complete_list(ep, &req_list, -ESHUTDOWN);
 
@@ -1694,6 +1703,9 @@ static void usba_dma_irq(struct usba_udc *udc, struct usba_ep *ep)
 	}
 }
 
+static int start_clock(struct usba_udc *udc);
+static void stop_clock(struct usba_udc *udc);
+
 static irqreturn_t usba_udc_irq(int irq, void *devid)
 {
 	struct usba_udc *udc = devid;
@@ -1708,10 +1720,13 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
 	DBG(DBG_INT, "irq, status=%#08x\n", status);
 
 	if (status & USBA_DET_SUSPEND) {
+		usba_writel(udc, INT_CLR, USBA_DET_SUSPEND|USBA_WAKE_UP);
+		usba_int_enb_set(udc, USBA_WAKE_UP);
+		usba_int_enb_clear(udc, USBA_DET_SUSPEND);
+		udc->suspended = true;
 		toggle_bias(udc, 0);
-		usba_writel(udc, INT_CLR, USBA_DET_SUSPEND);
-		usba_int_enb_set(udc, int_enb | USBA_WAKE_UP);
 		udc->bias_pulse_needed = true;
+		stop_clock(udc);
 		DBG(DBG_BUS, "Suspend detected\n");
 		if (udc->gadget.speed != USB_SPEED_UNKNOWN
 				&& udc->driver && udc->driver->suspend) {
@@ -1722,14 +1737,17 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
 	}
 
 	if (status & USBA_WAKE_UP) {
+		start_clock(udc);
 		toggle_bias(udc, 1);
 		usba_writel(udc, INT_CLR, USBA_WAKE_UP);
-		usba_int_enb_set(udc, int_enb & ~USBA_WAKE_UP);
 		DBG(DBG_BUS, "Wake Up CPU detected\n");
 	}
 
 	if (status & USBA_END_OF_RESUME) {
+		udc->suspended = false;
 		usba_writel(udc, INT_CLR, USBA_END_OF_RESUME);
+		usba_int_enb_clear(udc, USBA_WAKE_UP);
+		usba_int_enb_set(udc, USBA_DET_SUSPEND);
 		generate_bias_pulse(udc);
 		DBG(DBG_BUS, "Resume detected\n");
 		if (udc->gadget.speed != USB_SPEED_UNKNOWN
@@ -1744,6 +1762,8 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
 	if (dma_status) {
 		int i;
 
+		usba_int_enb_set(udc, USBA_DET_SUSPEND);
+
 		for (i = 1; i <= USBA_NR_DMAS; i++)
 			if (dma_status & (1 << i))
 				usba_dma_irq(udc, &udc->usba_ep[i]);
@@ -1753,6 +1773,8 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
 	if (ep_status) {
 		int i;
 
+		usba_int_enb_set(udc, USBA_DET_SUSPEND);
+
 		for (i = 0; i < udc->num_ep; i++)
 			if (ep_status & (1 << i)) {
 				if (ep_is_control(&udc->usba_ep[i]))
@@ -1766,7 +1788,9 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
 		struct usba_ep *ep0, *ep;
 		int i, n;
 
-		usba_writel(udc, INT_CLR, USBA_END_OF_RESET);
+		usba_writel(udc, INT_CLR,
+			USBA_END_OF_RESET|USBA_END_OF_RESUME
+			|USBA_DET_SUSPEND|USBA_WAKE_UP);
 		generate_bias_pulse(udc);
 		reset_all_endpoints(udc);
 
@@ -1793,7 +1817,12 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
 				| USBA_BF(BK_NUMBER, USBA_BK_NUMBER_ONE)));
 		usba_ep_writel(ep0, CTL_ENB,
 				USBA_EPT_ENABLE | USBA_RX_SETUP);
-		usba_int_enb_set(udc, int_enb | USBA_BF(EPT_INT, 1) |
+
+		/* If we get reset while suspended... */
+		udc->suspended = false;
+		usba_int_enb_clear(udc, USBA_WAKE_UP);
+
+		usba_int_enb_set(udc, USBA_BF(EPT_INT, 1) |
 				      USBA_DET_SUSPEND | USBA_END_OF_RESUME);
 
 		/*
@@ -1827,6 +1856,8 @@ static int start_clock(struct usba_udc *udc)
 	if (udc->clocked)
 		return 0;
 
+	pm_stay_awake(&udc->pdev->dev);
+
 	ret = clk_prepare_enable(udc->pclk);
 	if (ret)
 		return ret;
@@ -1849,6 +1880,8 @@ static void stop_clock(struct usba_udc *udc)
 	clk_disable_unprepare(udc->pclk);
 
 	udc->clocked = false;
+
+	pm_relax(&udc->pdev->dev);
 }
 
 static int usba_start(struct usba_udc *udc)
@@ -1860,9 +1893,19 @@ static int usba_start(struct usba_udc *udc)
 	if (ret)
 		return ret;
 
+	if (udc->suspended)
+		return 0;
+
 	spin_lock_irqsave(&udc->lock, flags);
 	toggle_bias(udc, 1);
 	usba_writel(udc, CTRL, USBA_ENABLE_MASK);
+	/* Clear all requested and pending interrupts... */
+	usba_writel(udc, INT_ENB, 0);
+	udc->int_enb_cache = 0;
+	usba_writel(udc, INT_CLR,
+		USBA_END_OF_RESET|USBA_END_OF_RESUME
+		|USBA_DET_SUSPEND|USBA_WAKE_UP);
+	/* ...and enable just 'reset' IRQ to get us started */
 	usba_int_enb_set(udc, USBA_END_OF_RESET);
 	spin_unlock_irqrestore(&udc->lock, flags);
 
@@ -1873,6 +1916,9 @@ static void usba_stop(struct usba_udc *udc)
 {
 	unsigned long flags;
 
+	if (udc->suspended)
+		return;
+
 	spin_lock_irqsave(&udc->lock, flags);
 	udc->gadget.speed = USB_SPEED_UNKNOWN;
 	reset_all_endpoints(udc);
@@ -1900,6 +1946,7 @@ static irqreturn_t usba_vbus_irq_thread(int irq, void *devid)
 		if (vbus) {
 			usba_start(udc);
 		} else {
+			udc->suspended = false;
 			usba_stop(udc);
 
 			if (udc->driver->disconnect)
@@ -1963,6 +2010,7 @@ static int atmel_usba_stop(struct usb_gadget *gadget)
 	if (fifo_mode == 0)
 		udc->configured_ep = 1;
 
+	udc->suspended = false;
 	usba_stop(udc);
 
 	udc->driver = NULL;
@@ -2276,6 +2324,7 @@ static int usba_udc_suspend(struct device *dev)
 	mutex_lock(&udc->vbus_mutex);
 
 	if (!device_may_wakeup(dev)) {
+		udc->suspended = false;
 		usba_stop(udc);
 		goto out;
 	}
@@ -2285,10 +2334,13 @@ static int usba_udc_suspend(struct device *dev)
 	 * to request vbus irq, assuming always on.
 	 */
 	if (udc->vbus_pin) {
+		/* FIXME: right to stop here...??? */
 		usba_stop(udc);
 		enable_irq_wake(gpiod_to_irq(udc->vbus_pin));
 	}
 
+	enable_irq_wake(udc->irq);
+
 out:
 	mutex_unlock(&udc->vbus_mutex);
 	return 0;
@@ -2302,8 +2354,12 @@ static int usba_udc_resume(struct device *dev)
 	if (!udc->driver)
 		return 0;
 
-	if (device_may_wakeup(dev) && udc->vbus_pin)
-		disable_irq_wake(gpiod_to_irq(udc->vbus_pin));
+	if (device_may_wakeup(dev)) {
+		if (udc->vbus_pin)
+			disable_irq_wake(gpiod_to_irq(udc->vbus_pin));
+
+		disable_irq_wake(udc->irq);
+	}
 
 	/* If Vbus is present, enable the controller and wait for reset */
 	mutex_lock(&udc->vbus_mutex);
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.h b/drivers/usb/gadget/udc/atmel_usba_udc.h
index 030bf797cd25..a0225e4543d4 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.h
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.h
@@ -331,6 +331,7 @@ struct usba_udc {
 	struct usba_ep *usba_ep;
 	bool bias_pulse_needed;
 	bool clocked;
+	bool suspended;
 
 	u16 devstatus;
 
diff --git a/drivers/usb/gadget/udc/dummy_hcd.c b/drivers/usb/gadget/udc/dummy_hcd.c
index 213b52508621..8414fac74493 100644
--- a/drivers/usb/gadget/udc/dummy_hcd.c
+++ b/drivers/usb/gadget/udc/dummy_hcd.c
@@ -617,21 +617,7 @@ static int dummy_enable(struct usb_ep *_ep,
 		_ep->name,
 		desc->bEndpointAddress & 0x0f,
 		(desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
-		({ char *val;
-		 switch (usb_endpoint_type(desc)) {
-		 case USB_ENDPOINT_XFER_BULK:
-			 val = "bulk";
-			 break;
-		 case USB_ENDPOINT_XFER_ISOC:
-			 val = "iso";
-			 break;
-		 case USB_ENDPOINT_XFER_INT:
-			 val = "intr";
-			 break;
-		 default:
-			 val = "ctrl";
-			 break;
-		 } val; }),
+		usb_ep_type_string(usb_endpoint_type(desc)),
 		max, ep->stream_en ? "enabled" : "disabled");
 
 	/* at this point real hardware should be NAKing transfers
diff --git a/drivers/usb/gadget/udc/lpc32xx_udc.c b/drivers/usb/gadget/udc/lpc32xx_udc.c
index b0781771704e..d8f1c60793ed 100644
--- a/drivers/usb/gadget/udc/lpc32xx_udc.c
+++ b/drivers/usb/gadget/udc/lpc32xx_udc.c
@@ -115,6 +115,11 @@ struct lpc32xx_ep {
 	bool			wedge;
 };
 
+enum atx_type {
+	ISP1301,
+	STOTG04,
+};
+
 /*
  * Common UDC structure
  */
@@ -129,8 +134,6 @@ struct lpc32xx_udc {
 
 	/* Board and device specific */
 	struct lpc32xx_usbd_cfg	*board;
-	u32			io_p_start;
-	u32			io_p_size;
 	void __iomem		*udp_baseaddr;
 	int			udp_irq[4];
 	struct clk		*usb_slv_clk;
@@ -151,10 +154,10 @@ struct lpc32xx_udc {
 	u8			last_vbus;
 	int			pullup;
 	int			poweron;
+	enum atx_type		atx;
 
 	/* Work queues related to I2C support */
 	struct work_struct	pullup_job;
-	struct work_struct	vbus_job;
 	struct work_struct	power_job;
 
 	/* USB device peripheral - various */
@@ -553,6 +556,15 @@ static inline void remove_debug_file(struct lpc32xx_udc *udc) {}
 /* Primary initialization sequence for the ISP1301 transceiver */
 static void isp1301_udc_configure(struct lpc32xx_udc *udc)
 {
+	u8 value;
+	s32 vendor, product;
+
+	vendor = i2c_smbus_read_word_data(udc->isp1301_i2c_client, 0x00);
+	product = i2c_smbus_read_word_data(udc->isp1301_i2c_client, 0x02);
+
+	if (vendor == 0x0483 && product == 0xa0c4)
+		udc->atx = STOTG04;
+
 	/* LPC32XX only supports DAT_SE0 USB mode */
 	/* This sequence is important */
 
@@ -572,8 +584,12 @@ static void isp1301_udc_configure(struct lpc32xx_udc *udc)
 	 */
 	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
 		(ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR), ~0);
+
+	value = MC2_BI_DI;
+	if (udc->atx != STOTG04)
+		value |= MC2_SPD_SUSP_CTRL;
 	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
-		ISP1301_I2C_MODE_CONTROL_2, (MC2_BI_DI | MC2_SPD_SUSP_CTRL));
+		ISP1301_I2C_MODE_CONTROL_2, value);
 
 	/* Driver VBUS_DRV high or low depending on board setup */
 	if (udc->board->vbus_drv_pol != 0)
@@ -601,24 +617,19 @@ static void isp1301_udc_configure(struct lpc32xx_udc *udc)
 		(ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
 		OTG1_VBUS_DISCHRG);
 
-	/* Clear and enable VBUS high edge interrupt */
 	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
 		ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
+
 	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
 		ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
 	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
-		ISP1301_I2C_INTERRUPT_FALLING, INT_VBUS_VLD);
-	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
 		ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
-	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
-		ISP1301_I2C_INTERRUPT_RISING, INT_VBUS_VLD);
 
-	dev_info(udc->dev, "ISP1301 Vendor ID  : 0x%04x\n",
-		 i2c_smbus_read_word_data(udc->isp1301_i2c_client, 0x00));
-	dev_info(udc->dev, "ISP1301 Product ID : 0x%04x\n",
-		 i2c_smbus_read_word_data(udc->isp1301_i2c_client, 0x02));
+	dev_info(udc->dev, "ISP1301 Vendor ID  : 0x%04x\n", vendor);
+	dev_info(udc->dev, "ISP1301 Product ID : 0x%04x\n", product);
 	dev_info(udc->dev, "ISP1301 Version ID : 0x%04x\n",
 		 i2c_smbus_read_word_data(udc->isp1301_i2c_client, 0x14));
+
 }
 
 /* Enables or disables the USB device pullup via the ISP1301 transceiver */
@@ -661,6 +672,10 @@ static void isp1301_pullup_enable(struct lpc32xx_udc *udc, int en_pullup,
 /* Powers up or down the ISP1301 transceiver */
 static void isp1301_set_powerstate(struct lpc32xx_udc *udc, int enable)
 {
+	/* There is no "global power down" register for stotg04 */
+	if (udc->atx == STOTG04)
+		return;
+
 	if (enable != 0)
 		/* Power up ISP1301 - this ISP1301 will automatically wakeup
 		   when VBUS is detected */
@@ -2830,11 +2845,9 @@ static irqreturn_t lpc32xx_usb_devdma_irq(int irq, void *_udc)
  * VBUS detection, pullup handler, and Gadget cable state notification
  *
  */
-static void vbus_work(struct work_struct *work)
+static void vbus_work(struct lpc32xx_udc *udc)
 {
 	u8 value;
-	struct lpc32xx_udc *udc = container_of(work, struct lpc32xx_udc,
-					       vbus_job);
 
 	if (udc->enabled != 0) {
 		/* Discharge VBUS real quick */
@@ -2870,18 +2883,13 @@ static void vbus_work(struct work_struct *work)
 			lpc32xx_vbus_session(&udc->gadget, udc->vbus);
 		}
 	}
-
-	/* Re-enable after completion */
-	enable_irq(udc->udp_irq[IRQ_USB_ATX]);
 }
 
 static irqreturn_t lpc32xx_usb_vbus_irq(int irq, void *_udc)
 {
 	struct lpc32xx_udc *udc = _udc;
 
-	/* Defer handling of VBUS IRQ to work queue */
-	disable_irq_nosync(udc->udp_irq[IRQ_USB_ATX]);
-	schedule_work(&udc->vbus_job);
+	vbus_work(udc);
 
 	return IRQ_HANDLED;
 }
@@ -2890,7 +2898,6 @@ static int lpc32xx_start(struct usb_gadget *gadget,
 			 struct usb_gadget_driver *driver)
 {
 	struct lpc32xx_udc *udc = to_udc(gadget);
-	int i;
 
 	if (!driver || driver->max_speed < USB_SPEED_FULL || !driver->setup) {
 		dev_err(udc->dev, "bad parameter.\n");
@@ -2910,22 +2917,25 @@ static int lpc32xx_start(struct usb_gadget *gadget,
 
 	/* Force VBUS process once to check for cable insertion */
 	udc->last_vbus = udc->vbus = 0;
-	schedule_work(&udc->vbus_job);
+	vbus_work(udc);
 
-	/* Do not re-enable ATX IRQ (3) */
-	for (i = IRQ_USB_LP; i < IRQ_USB_ATX; i++)
-		enable_irq(udc->udp_irq[i]);
+	/* enable interrupts */
+	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
+		ISP1301_I2C_INTERRUPT_FALLING, INT_SESS_VLD | INT_VBUS_VLD);
+	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
+		ISP1301_I2C_INTERRUPT_RISING, INT_SESS_VLD | INT_VBUS_VLD);
 
 	return 0;
 }
 
 static int lpc32xx_stop(struct usb_gadget *gadget)
 {
-	int i;
 	struct lpc32xx_udc *udc = to_udc(gadget);
 
-	for (i = IRQ_USB_LP; i <= IRQ_USB_ATX; i++)
-		disable_irq(udc->udp_irq[i]);
+	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
+		ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
+	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
+		ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
 
 	if (udc->clocked) {
 		spin_lock(&udc->lock);
@@ -2999,7 +3009,7 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
 	dma_addr_t dma_handle;
 	struct device_node *isp1301_node;
 
-	udc = kmemdup(&controller_template, sizeof(*udc), GFP_KERNEL);
+	udc = devm_kmemdup(dev, &controller_template, sizeof(*udc), GFP_KERNEL);
 	if (!udc)
 		return -ENOMEM;
 
@@ -3022,8 +3032,7 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
 
 	udc->isp1301_i2c_client = isp1301_get_client(isp1301_node);
 	if (!udc->isp1301_i2c_client) {
-		retval = -EPROBE_DEFER;
-		goto phy_fail;
+		return -EPROBE_DEFER;
 	}
 
 	dev_info(udc->dev, "ISP1301 I2C device at address 0x%x\n",
@@ -3032,7 +3041,7 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
 	pdev->dev.dma_mask = &lpc32xx_usbd_dmamask;
 	retval = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
 	if (retval)
-		goto resource_fail;
+		return retval;
 
 	udc->board = &lpc32xx_usbddata;
 
@@ -3045,10 +3054,8 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
 	 *  IORESOURCE_IRQ, USB transceiver interrupt number
 	 */
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		retval = -ENXIO;
-		goto resource_fail;
-	}
+	if (!res)
+		return -ENXIO;
 
 	spin_lock_init(&udc->lock);
 
@@ -3058,45 +3065,33 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
 		if (udc->udp_irq[i] < 0) {
 			dev_err(udc->dev,
 				"irq resource %d not available!\n", i);
-			retval = udc->udp_irq[i];
-			goto irq_fail;
+			return udc->udp_irq[i];
 		}
 	}
 
-	udc->io_p_start = res->start;
-	udc->io_p_size = resource_size(res);
-	if (!request_mem_region(udc->io_p_start, udc->io_p_size, driver_name)) {
-		dev_err(udc->dev, "someone's using UDC memory\n");
-		retval = -EBUSY;
-		goto request_mem_region_fail;
-	}
-
-	udc->udp_baseaddr = ioremap(udc->io_p_start, udc->io_p_size);
+	udc->udp_baseaddr = devm_ioremap_resource(dev, res);
 	if (!udc->udp_baseaddr) {
-		retval = -ENOMEM;
 		dev_err(udc->dev, "IO map failure\n");
-		goto io_map_fail;
+		return -ENOMEM;
 	}
 
 	/* Get USB device clock */
-	udc->usb_slv_clk = clk_get(&pdev->dev, NULL);
+	udc->usb_slv_clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(udc->usb_slv_clk)) {
 		dev_err(udc->dev, "failed to acquire USB device clock\n");
-		retval = PTR_ERR(udc->usb_slv_clk);
-		goto usb_clk_get_fail;
+		return PTR_ERR(udc->usb_slv_clk);
 	}
 
 	/* Enable USB device clock */
 	retval = clk_prepare_enable(udc->usb_slv_clk);
 	if (retval < 0) {
 		dev_err(udc->dev, "failed to start USB device clock\n");
-		goto usb_clk_enable_fail;
+		return retval;
 	}
 
 	/* Setup deferred workqueue data */
 	udc->poweron = udc->pullup = 0;
 	INIT_WORK(&udc->pullup_job, pullup_work);
-	INIT_WORK(&udc->vbus_job, vbus_work);
 #ifdef CONFIG_PM
 	INIT_WORK(&udc->power_job, power_work);
 #endif
@@ -3134,47 +3129,44 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
 
 	/* Request IRQs - low and high priority USB device IRQs are routed to
 	 * the same handler, while the DMA interrupt is routed elsewhere */
-	retval = request_irq(udc->udp_irq[IRQ_USB_LP], lpc32xx_usb_lp_irq,
-			     0, "udc_lp", udc);
+	retval = devm_request_irq(dev, udc->udp_irq[IRQ_USB_LP],
+				  lpc32xx_usb_lp_irq, 0, "udc_lp", udc);
 	if (retval < 0) {
 		dev_err(udc->dev, "LP request irq %d failed\n",
 			udc->udp_irq[IRQ_USB_LP]);
-		goto irq_lp_fail;
+		goto irq_req_fail;
 	}
-	retval = request_irq(udc->udp_irq[IRQ_USB_HP], lpc32xx_usb_hp_irq,
-			     0, "udc_hp", udc);
+	retval = devm_request_irq(dev, udc->udp_irq[IRQ_USB_HP],
+				  lpc32xx_usb_hp_irq, 0, "udc_hp", udc);
 	if (retval < 0) {
 		dev_err(udc->dev, "HP request irq %d failed\n",
 			udc->udp_irq[IRQ_USB_HP]);
-		goto irq_hp_fail;
+		goto irq_req_fail;
 	}
 
-	retval = request_irq(udc->udp_irq[IRQ_USB_DEVDMA],
-			     lpc32xx_usb_devdma_irq, 0, "udc_dma", udc);
+	retval = devm_request_irq(dev, udc->udp_irq[IRQ_USB_DEVDMA],
+				  lpc32xx_usb_devdma_irq, 0, "udc_dma", udc);
 	if (retval < 0) {
 		dev_err(udc->dev, "DEV request irq %d failed\n",
 			udc->udp_irq[IRQ_USB_DEVDMA]);
-		goto irq_dev_fail;
+		goto irq_req_fail;
 	}
 
 	/* The transceiver interrupt is used for VBUS detection and will
 	   kick off the VBUS handler function */
-	retval = request_irq(udc->udp_irq[IRQ_USB_ATX], lpc32xx_usb_vbus_irq,
-			     0, "udc_otg", udc);
+	retval = devm_request_threaded_irq(dev, udc->udp_irq[IRQ_USB_ATX], NULL,
+					   lpc32xx_usb_vbus_irq, IRQF_ONESHOT,
+					   "udc_otg", udc);
 	if (retval < 0) {
 		dev_err(udc->dev, "VBUS request irq %d failed\n",
 			udc->udp_irq[IRQ_USB_ATX]);
-		goto irq_xcvr_fail;
+		goto irq_req_fail;
 	}
 
 	/* Initialize wait queue */
 	init_waitqueue_head(&udc->ep_disable_wait_queue);
 	atomic_set(&udc->enabled_ep_cnt, 0);
 
-	/* Keep all IRQs disabled until GadgetFS starts up */
-	for (i = IRQ_USB_LP; i <= IRQ_USB_ATX; i++)
-		disable_irq(udc->udp_irq[i]);
-
 	retval = usb_add_gadget_udc(dev, &udc->gadget);
 	if (retval < 0)
 		goto add_gadget_fail;
@@ -3190,32 +3182,15 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
 	return 0;
 
 add_gadget_fail:
-	free_irq(udc->udp_irq[IRQ_USB_ATX], udc);
-irq_xcvr_fail:
-	free_irq(udc->udp_irq[IRQ_USB_DEVDMA], udc);
-irq_dev_fail:
-	free_irq(udc->udp_irq[IRQ_USB_HP], udc);
-irq_hp_fail:
-	free_irq(udc->udp_irq[IRQ_USB_LP], udc);
-irq_lp_fail:
+irq_req_fail:
 	dma_pool_destroy(udc->dd_cache);
 dma_alloc_fail:
 	dma_free_coherent(&pdev->dev, UDCA_BUFF_SIZE,
 			  udc->udca_v_base, udc->udca_p_base);
 i2c_fail:
 	clk_disable_unprepare(udc->usb_slv_clk);
-usb_clk_enable_fail:
-	clk_put(udc->usb_slv_clk);
-usb_clk_get_fail:
-	iounmap(udc->udp_baseaddr);
-io_map_fail:
-	release_mem_region(udc->io_p_start, udc->io_p_size);
 	dev_err(udc->dev, "%s probe failed, %d\n", driver_name, retval);
-request_mem_region_fail:
-irq_fail:
-resource_fail:
-phy_fail:
-	kfree(udc);
+
 	return retval;
 }
 
@@ -3231,24 +3206,14 @@ static int lpc32xx_udc_remove(struct platform_device *pdev)
 	udc_disable(udc);
 	pullup(udc, 0);
 
-	free_irq(udc->udp_irq[IRQ_USB_ATX], udc);
-
 	device_init_wakeup(&pdev->dev, 0);
 	remove_debug_file(udc);
 
 	dma_pool_destroy(udc->dd_cache);
 	dma_free_coherent(&pdev->dev, UDCA_BUFF_SIZE,
 			  udc->udca_v_base, udc->udca_p_base);
-	free_irq(udc->udp_irq[IRQ_USB_DEVDMA], udc);
-	free_irq(udc->udp_irq[IRQ_USB_HP], udc);
-	free_irq(udc->udp_irq[IRQ_USB_LP], udc);
 
 	clk_disable_unprepare(udc->usb_slv_clk);
-	clk_put(udc->usb_slv_clk);
-
-	iounmap(udc->udp_baseaddr);
-	release_mem_region(udc->io_p_start, udc->io_p_size);
-	kfree(udc);
 
 	return 0;
 }
diff --git a/drivers/usb/gadget/udc/net2272.c b/drivers/usb/gadget/udc/net2272.c
index c2011cd7df8c..564aeee1a1fe 100644
--- a/drivers/usb/gadget/udc/net2272.c
+++ b/drivers/usb/gadget/udc/net2272.c
@@ -573,8 +573,7 @@ net2272_read_fifo(struct net2272_ep *ep, struct net2272_request *req)
 
 		/* completion */
 		if (unlikely(cleanup || is_short ||
-				((req->req.actual == req->req.length)
-				 && !req->req.zero))) {
+				req->req.actual == req->req.length)) {
 
 			if (cleanup) {
 				net2272_out_flush(ep);
diff --git a/drivers/usb/gadget/udc/net2280.c b/drivers/usb/gadget/udc/net2280.c
index 898339e5df10..b6bbe2e448ba 100644
--- a/drivers/usb/gadget/udc/net2280.c
+++ b/drivers/usb/gadget/udc/net2280.c
@@ -789,8 +789,7 @@ static int read_fifo(struct net2280_ep *ep, struct net2280_request *req)
 		(void) readl(&ep->regs->ep_rsp);
 	}
 
-	return is_short || ((req->req.actual == req->req.length) &&
-			!req->req.zero);
+	return is_short || req->req.actual == req->req.length;
 }
 
 /* fill out dma descriptor to match a given request */
@@ -1058,7 +1057,7 @@ net2280_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 			/* PIO ... stuff the fifo, or unblock it.  */
 			if (ep->is_in)
 				write_fifo(ep, _req);
-			else if (list_empty(&ep->queue)) {
+			else {
 				u32	s;
 
 				/* OUT FIFO might have packet(s) buffered */