diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index 9fae0291cd69..d64551243789 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -868,6 +868,7 @@ struct dwc2_hsotg {
 	void *priv;
 	int     irq;
 	struct clk *clk;
+	struct reset_control *reset;
 
 	unsigned int queuing_high_bandwidth:1;
 	unsigned int srp_success:1;
diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
index fc6f5251de5d..530959a8a6d1 100644
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -45,6 +45,7 @@
 #include <linux/platform_device.h>
 #include <linux/phy/phy.h>
 #include <linux/platform_data/s3c-hsotg.h>
+#include <linux/reset.h>
 
 #include <linux/usb/of.h>
 
@@ -337,6 +338,24 @@ static int dwc2_lowlevel_hw_init(struct dwc2_hsotg *hsotg)
 {
 	int i, ret;
 
+	hsotg->reset = devm_reset_control_get_optional(hsotg->dev, "dwc2");
+	if (IS_ERR(hsotg->reset)) {
+		ret = PTR_ERR(hsotg->reset);
+		switch (ret) {
+		case -ENOENT:
+		case -ENOTSUPP:
+			hsotg->reset = NULL;
+			break;
+		default:
+			dev_err(hsotg->dev, "error getting reset control %d\n",
+				ret);
+			return ret;
+		}
+	}
+
+	if (hsotg->reset)
+		reset_control_deassert(hsotg->reset);
+
 	/* Set default UTMI width */
 	hsotg->phyif = GUSBCFG_PHYIF16;
 
@@ -434,6 +453,9 @@ static int dwc2_driver_remove(struct platform_device *dev)
 	if (hsotg->ll_hw_enabled)
 		dwc2_lowlevel_hw_disable(hsotg);
 
+	if (hsotg->reset)
+		reset_control_assert(hsotg->reset);
+
 	return 0;
 }
 
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 946643157b78..35d092456bec 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -1192,6 +1192,7 @@ static int dwc3_runtime_resume(struct device *dev)
 	}
 
 	pm_runtime_mark_last_busy(dev);
+	pm_runtime_put(dev);
 
 	return 0;
 }
diff --git a/drivers/usb/dwc3/debug.h b/drivers/usb/dwc3/debug.h
index 22dfc3dd6a13..33ab2a203c1b 100644
--- a/drivers/usb/dwc3/debug.h
+++ b/drivers/usb/dwc3/debug.h
@@ -192,7 +192,7 @@ dwc3_ep_event_string(const struct dwc3_event_depevt *event)
 	int ret;
 
 	ret = sprintf(str, "ep%d%s: ", epnum >> 1,
-			(epnum & 1) ? "in" : "in");
+			(epnum & 1) ? "in" : "out");
 	if (ret < 0)
 		return "UNKNOWN";
 
diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
index 2eb84d6c24a6..0a32430f4c41 100644
--- a/drivers/usb/dwc3/dwc3-pci.c
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -243,6 +243,13 @@ static int dwc3_pci_runtime_suspend(struct device *dev)
 	return -EBUSY;
 }
 
+static int dwc3_pci_runtime_resume(struct device *dev)
+{
+	struct platform_device *dwc3 = dev_get_drvdata(dev);
+
+	return pm_runtime_get(&dwc3->dev);
+}
+
 static int dwc3_pci_pm_dummy(struct device *dev)
 {
 	/*
@@ -259,7 +266,7 @@ static int dwc3_pci_pm_dummy(struct device *dev)
 
 static struct dev_pm_ops dwc3_pci_dev_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_pm_dummy, dwc3_pci_pm_dummy)
-	SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_pm_dummy,
+	SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_runtime_resume,
 		NULL)
 };
 
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 1f5597ef945d..7a8d3d822b54 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -884,12 +884,9 @@ static u32 dwc3_calc_trbs_left(struct dwc3_ep *dep)
 		return DWC3_TRB_NUM - 1;
 	}
 
-	trbs_left = dep->trb_dequeue - dep->trb_enqueue;
+	trbs_left = dep->trb_dequeue - dep->trb_enqueue - 1;
 	trbs_left &= (DWC3_TRB_NUM - 1);
 
-	if (dep->trb_dequeue < dep->trb_enqueue)
-		trbs_left--;
-
 	return trbs_left;
 }
 
@@ -1433,7 +1430,7 @@ static int dwc3_gadget_get_frame(struct usb_gadget *g)
 
 static int __dwc3_gadget_wakeup(struct dwc3 *dwc)
 {
-	unsigned long		timeout;
+	int			retries;
 
 	int			ret;
 	u32			reg;
@@ -1484,9 +1481,9 @@ static int __dwc3_gadget_wakeup(struct dwc3 *dwc)
 	}
 
 	/* poll until Link State changes to ON */
-	timeout = jiffies + msecs_to_jiffies(100);
+	retries = 20000;
 
-	while (!time_after(jiffies, timeout)) {
+	while (retries--) {
 		reg = dwc3_readl(dwc->regs, DWC3_DSTS);
 
 		/* in HS, means ON */
diff --git a/drivers/usb/gadget/function/f_eem.c b/drivers/usb/gadget/function/f_eem.c
index d58bfc32be9e..8741fd740174 100644
--- a/drivers/usb/gadget/function/f_eem.c
+++ b/drivers/usb/gadget/function/f_eem.c
@@ -341,11 +341,15 @@ static struct sk_buff *eem_wrap(struct gether *port, struct sk_buff *skb)
 {
 	struct sk_buff	*skb2 = NULL;
 	struct usb_ep	*in = port->in_ep;
-	int		padlen = 0;
+	int		headroom, tailroom, padlen = 0;
 	u16		len = skb->len;
 
-	int headroom = skb_headroom(skb);
-	int tailroom = skb_tailroom(skb);
+	if (!skb)
+		return NULL;
+
+	len = skb->len;
+	headroom = skb_headroom(skb);
+	tailroom = skb_tailroom(skb);
 
 	/* When (len + EEM_HLEN + ETH_FCS_LEN) % in->maxpacket) is 0,
 	 * stick two bytes of zero-length EEM packet on the end.
diff --git a/drivers/usb/gadget/function/f_rndis.c b/drivers/usb/gadget/function/f_rndis.c
index c8005823b190..16562e461121 100644
--- a/drivers/usb/gadget/function/f_rndis.c
+++ b/drivers/usb/gadget/function/f_rndis.c
@@ -374,6 +374,9 @@ static struct sk_buff *rndis_add_header(struct gether *port,
 {
 	struct sk_buff *skb2;
 
+	if (!skb)
+		return NULL;
+
 	skb2 = skb_realloc_headroom(skb, sizeof(struct rndis_packet_msg_type));
 	rndis_add_hdr(skb2);
 
diff --git a/drivers/usb/gadget/function/u_serial.c b/drivers/usb/gadget/function/u_serial.c
index 6ded6345cd09..e0cd1e4c8892 100644
--- a/drivers/usb/gadget/function/u_serial.c
+++ b/drivers/usb/gadget/function/u_serial.c
@@ -375,10 +375,15 @@ __acquires(&port->port_lock)
 */
 {
 	struct list_head	*pool = &port->write_pool;
-	struct usb_ep		*in = port->port_usb->in;
+	struct usb_ep		*in;
 	int			status = 0;
 	bool			do_tty_wake = false;
 
+	if (!port->port_usb)
+		return status;
+
+	in = port->port_usb->in;
+
 	while (!port->write_busy && !list_empty(pool)) {
 		struct usb_request	*req;
 		int			len;
diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
index 934f83881c30..40c04bb25f2f 100644
--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -827,7 +827,7 @@ void usb_gadget_unmap_request_by_dev(struct device *dev,
 		return;
 
 	if (req->num_mapped_sgs) {
-		dma_unmap_sg(dev, req->sg, req->num_mapped_sgs,
+		dma_unmap_sg(dev, req->sg, req->num_sgs,
 				is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
 
 		req->num_mapped_sgs = 0;
diff --git a/drivers/usb/gadget/udc/fsl_qe_udc.c b/drivers/usb/gadget/udc/fsl_qe_udc.c
index cf8819a5c5b2..8bb011ea78f7 100644
--- a/drivers/usb/gadget/udc/fsl_qe_udc.c
+++ b/drivers/usb/gadget/udc/fsl_qe_udc.c
@@ -1878,11 +1878,8 @@ static int qe_get_frame(struct usb_gadget *gadget)
 
 	tmp = in_be16(&udc->usb_param->frame_n);
 	if (tmp & 0x8000)
-		tmp = tmp & 0x07ff;
-	else
-		tmp = -EINVAL;
-
-	return (int)tmp;
+		return tmp & 0x07ff;
+	return -EINVAL;
 }
 
 static int fsl_qe_start(struct usb_gadget *gadget,
diff --git a/drivers/usb/renesas_usbhs/mod_gadget.c b/drivers/usb/renesas_usbhs/mod_gadget.c
index 92bc83b92d10..c4c64740a3e7 100644
--- a/drivers/usb/renesas_usbhs/mod_gadget.c
+++ b/drivers/usb/renesas_usbhs/mod_gadget.c
@@ -1076,7 +1076,7 @@ int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
 
 	gpriv->transceiver = usb_get_phy(USB_PHY_TYPE_UNDEFINED);
 	dev_info(dev, "%stransceiver found\n",
-		 gpriv->transceiver ? "" : "no ");
+		 !IS_ERR(gpriv->transceiver) ? "" : "no ");
 
 	/*
 	 * CAUTION