diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
index b870872e020f1e0bd8e93c157b76d145bc2b2122..70fc43027a5c65b6f29f22dc9ec64c18db220323 100644
--- a/drivers/usb/dwc3/Kconfig
+++ b/drivers/usb/dwc3/Kconfig
@@ -1,7 +1,6 @@
 config USB_DWC3
 	tristate "DesignWare USB3 DRD Core Support"
 	depends on (USB || USB_GADGET) && HAS_DMA
-	depends on EXTCON
 	select USB_XHCI_PLATFORM if USB_SUPPORT && USB_XHCI_HCD
 	help
 	  Say Y or M here if your system has a Dual Role SuperSpeed
diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
index 9b138129e856aa22b27c4a83398adf55c8949247..997ebe420bc9f5ea780f0339fea0193235be1398 100644
--- a/drivers/usb/dwc3/dwc3-pci.c
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -28,6 +28,7 @@
 /* FIXME define these in <linux/pci_ids.h> */
 #define PCI_VENDOR_ID_SYNOPSYS		0x16c3
 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3	0xabcd
+#define PCI_DEVICE_ID_INTEL_BYT		0x0f37
 
 struct dwc3_pci {
 	struct device		*dev;
@@ -187,6 +188,7 @@ static DEFINE_PCI_DEVICE_TABLE(dwc3_pci_id_table) = {
 		PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 				PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 	},
+	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
 	{  }	/* Terminating Entry */
 };
 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index f168eaebdef8fc6731de7c6994c658737495fdce..5452c0fce36074d4238e3553bb00d879d8df9ac3 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2611,15 +2611,13 @@ int dwc3_gadget_init(struct dwc3 *dwc)
 	ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget);
 	if (ret) {
 		dev_err(dwc->dev, "failed to register udc\n");
-		goto err5;
+		goto err4;
 	}
 
 	return 0;
 
-err5:
-	dwc3_gadget_free_endpoints(dwc);
-
 err4:
+	dwc3_gadget_free_endpoints(dwc);
 	dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE,
 			dwc->ep0_bounce, dwc->ep0_bounce_addr);
 
diff --git a/drivers/usb/gadget/cdc2.c b/drivers/usb/gadget/cdc2.c
index 5a5acf22c694514f5b3ebede7903f9912e4138b5..e126b6b248e63cd1b412bea2561e90bd15a104d3 100644
--- a/drivers/usb/gadget/cdc2.c
+++ b/drivers/usb/gadget/cdc2.c
@@ -113,12 +113,6 @@ static int __init cdc_do_config(struct usb_configuration *c)
 		c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
 	}
 
-	fi_ecm = usb_get_function_instance("ecm");
-	if (IS_ERR(fi_ecm)) {
-		status = PTR_ERR(fi_ecm);
-		goto err_func_ecm;
-	}
-
 	f_ecm = usb_get_function(fi_ecm);
 	if (IS_ERR(f_ecm)) {
 		status = PTR_ERR(f_ecm);
@@ -129,35 +123,24 @@ static int __init cdc_do_config(struct usb_configuration *c)
 	if (status)
 		goto err_add_ecm;
 
-	fi_serial = usb_get_function_instance("acm");
-	if (IS_ERR(fi_serial)) {
-		status = PTR_ERR(fi_serial);
-		goto err_get_acm;
-	}
-
 	f_acm = usb_get_function(fi_serial);
 	if (IS_ERR(f_acm)) {
 		status = PTR_ERR(f_acm);
-		goto err_func_acm;
+		goto err_get_acm;
 	}
 
 	status = usb_add_function(c, f_acm);
 	if (status)
 		goto err_add_acm;
-
 	return 0;
 
 err_add_acm:
 	usb_put_function(f_acm);
-err_func_acm:
-	usb_put_function_instance(fi_serial);
 err_get_acm:
 	usb_remove_function(c, f_ecm);
 err_add_ecm:
 	usb_put_function(f_ecm);
 err_get_ecm:
-	usb_put_function_instance(fi_ecm);
-err_func_ecm:
 	return status;
 }
 
diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c
index 06ecd08fd57a3174022a3579f458c84f30440123..b8a2376971a47aa357794117f74390aaee01a594 100644
--- a/drivers/usb/gadget/dummy_hcd.c
+++ b/drivers/usb/gadget/dummy_hcd.c
@@ -923,8 +923,9 @@ static int dummy_udc_stop(struct usb_gadget *g,
 	struct dummy_hcd	*dum_hcd = gadget_to_dummy_hcd(g);
 	struct dummy		*dum = dum_hcd->dum;
 
-	dev_dbg(udc_dev(dum), "unregister gadget driver '%s'\n",
-			driver->driver.name);
+	if (driver)
+		dev_dbg(udc_dev(dum), "unregister gadget driver '%s'\n",
+				driver->driver.name);
 
 	dum->driver = NULL;
 
@@ -1000,8 +1001,8 @@ static int dummy_udc_remove(struct platform_device *pdev)
 {
 	struct dummy	*dum = platform_get_drvdata(pdev);
 
-	usb_del_gadget_udc(&dum->gadget);
 	device_remove_file(&dum->gadget.dev, &dev_attr_function);
+	usb_del_gadget_udc(&dum->gadget);
 	return 0;
 }
 
diff --git a/drivers/usb/gadget/f_ecm.c b/drivers/usb/gadget/f_ecm.c
index edab45da37417e16960b75033a46a8453475b77b..8d9e6f7e8f1a5a6c36965dfdd4c5a213f4f917aa 100644
--- a/drivers/usb/gadget/f_ecm.c
+++ b/drivers/usb/gadget/f_ecm.c
@@ -995,7 +995,7 @@ static void ecm_unbind(struct usb_configuration *c, struct usb_function *f)
 	usb_ep_free_request(ecm->notify, ecm->notify_req);
 }
 
-struct usb_function *ecm_alloc(struct usb_function_instance *fi)
+static struct usb_function *ecm_alloc(struct usb_function_instance *fi)
 {
 	struct f_ecm	*ecm;
 	struct f_ecm_opts *opts;
diff --git a/drivers/usb/gadget/f_eem.c b/drivers/usb/gadget/f_eem.c
index d00392d879db3aa3e75d093d4e26041fa42bcb54..d61c11d765d0a92b9e9e79270e9de4b3cb474ca3 100644
--- a/drivers/usb/gadget/f_eem.c
+++ b/drivers/usb/gadget/f_eem.c
@@ -624,7 +624,7 @@ static void eem_unbind(struct usb_configuration *c, struct usb_function *f)
 	usb_free_all_descriptors(f);
 }
 
-struct usb_function *eem_alloc(struct usb_function_instance *fi)
+static struct usb_function *eem_alloc(struct usb_function_instance *fi)
 {
 	struct f_eem	*eem;
 	struct f_eem_opts *opts;
diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
index 313b835eedfd58948d23a96a85ade673347e8114..a01d7d38c01685135a503885342be7f9ec63ebbd 100644
--- a/drivers/usb/gadget/f_mass_storage.c
+++ b/drivers/usb/gadget/f_mass_storage.c
@@ -2260,10 +2260,12 @@ static int do_set_interface(struct fsg_common *common, struct fsg_dev *new_fsg)
 		/* Disable the endpoints */
 		if (fsg->bulk_in_enabled) {
 			usb_ep_disable(fsg->bulk_in);
+			fsg->bulk_in->driver_data = NULL;
 			fsg->bulk_in_enabled = 0;
 		}
 		if (fsg->bulk_out_enabled) {
 			usb_ep_disable(fsg->bulk_out);
+			fsg->bulk_out->driver_data = NULL;
 			fsg->bulk_out_enabled = 0;
 		}
 
diff --git a/drivers/usb/gadget/fotg210-udc.c b/drivers/usb/gadget/fotg210-udc.c
index 32db2eee2d8738fe5388f8c00bd2c644ac2b5b20..bbbfd19487784c6ebbfb107a24a7233c45740a45 100644
--- a/drivers/usb/gadget/fotg210-udc.c
+++ b/drivers/usb/gadget/fotg210-udc.c
@@ -1214,6 +1214,6 @@ static struct platform_driver fotg210_driver = {
 
 module_platform_driver(fotg210_driver);
 
-MODULE_AUTHOR("Yuan-Hsin Chen <yhchen@faraday-tech.com>");
+MODULE_AUTHOR("Yuan-Hsin Chen, Feng-Hsin Chiang <john453@faraday-tech.com>");
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION(DRIVER_DESC);
diff --git a/drivers/usb/gadget/fusb300_udc.c b/drivers/usb/gadget/fusb300_udc.c
index f1dd6daabe217c0742140c1619c3be5aa22c8c54..b278abe524539640f14a29f70a1f3a9d25fa1747 100644
--- a/drivers/usb/gadget/fusb300_udc.c
+++ b/drivers/usb/gadget/fusb300_udc.c
@@ -22,7 +22,7 @@
 
 MODULE_DESCRIPTION("FUSB300  USB gadget driver");
 MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Yuan Hsin Chen <yhchen@faraday-tech.com>");
+MODULE_AUTHOR("Yuan-Hsin Chen, Feng-Hsin Chiang <john453@faraday-tech.com>");
 MODULE_ALIAS("platform:fusb300_udc");
 
 #define DRIVER_VERSION	"20 October 2010"
diff --git a/drivers/usb/gadget/multi.c b/drivers/usb/gadget/multi.c
index 2a1ebefd8f9eb31318fc861fbc010214148db18d..23393254a8a35593526062cc09880f50c809dced 100644
--- a/drivers/usb/gadget/multi.c
+++ b/drivers/usb/gadget/multi.c
@@ -179,7 +179,7 @@ static __init int rndis_do_config(struct usb_configuration *c)
 	return ret;
 }
 
-static int rndis_config_register(struct usb_composite_dev *cdev)
+static __ref int rndis_config_register(struct usb_composite_dev *cdev)
 {
 	static struct usb_configuration config = {
 		.bConfigurationValue	= MULTI_RNDIS_CONFIG_NUM,
@@ -194,7 +194,7 @@ static int rndis_config_register(struct usb_composite_dev *cdev)
 
 #else
 
-static int rndis_config_register(struct usb_composite_dev *cdev)
+static __ref int rndis_config_register(struct usb_composite_dev *cdev)
 {
 	return 0;
 }
@@ -241,7 +241,7 @@ static __init int cdc_do_config(struct usb_configuration *c)
 	return ret;
 }
 
-static int cdc_config_register(struct usb_composite_dev *cdev)
+static __ref int cdc_config_register(struct usb_composite_dev *cdev)
 {
 	static struct usb_configuration config = {
 		.bConfigurationValue	= MULTI_CDC_CONFIG_NUM,
@@ -256,7 +256,7 @@ static int cdc_config_register(struct usb_composite_dev *cdev)
 
 #else
 
-static int cdc_config_register(struct usb_composite_dev *cdev)
+static __ref int cdc_config_register(struct usb_composite_dev *cdev)
 {
 	return 0;
 }
diff --git a/drivers/usb/gadget/mv_u3d_core.c b/drivers/usb/gadget/mv_u3d_core.c
index bbb6e98c4384292d3446b62f8671decaf0a51c55..561b30efb8ee84de6fc37c33005cdadc6fbcc5ff 100644
--- a/drivers/usb/gadget/mv_u3d_core.c
+++ b/drivers/usb/gadget/mv_u3d_core.c
@@ -645,6 +645,7 @@ static int  mv_u3d_ep_disable(struct usb_ep *_ep)
 	struct mv_u3d_ep *ep;
 	struct mv_u3d_ep_context *ep_context;
 	u32 epxcr, direction;
+	unsigned long flags;
 
 	if (!_ep)
 		return -EINVAL;
@@ -661,7 +662,9 @@ static int  mv_u3d_ep_disable(struct usb_ep *_ep)
 	direction = mv_u3d_ep_dir(ep);
 
 	/* nuke all pending requests (does flush) */
+	spin_lock_irqsave(&u3d->lock, flags);
 	mv_u3d_nuke(ep, -ESHUTDOWN);
+	spin_unlock_irqrestore(&u3d->lock, flags);
 
 	/* Disable the endpoint for Rx or Tx and reset the endpoint type */
 	if (direction == MV_U3D_EP_DIR_OUT) {
diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index d69b36a99dbcd8ae5a1bc57275398be86a2562ca..6bddf1aa23479f388ac101355d500a858d8b02a4 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -2475,8 +2475,6 @@ static irqreturn_t s3c_hsotg_irq(int irq, void *pw)
 	if (gintsts & GINTSTS_ErlySusp) {
 		dev_dbg(hsotg->dev, "GINTSTS_ErlySusp\n");
 		writel(GINTSTS_ErlySusp, hsotg->regs + GINTSTS);
-
-		s3c_hsotg_disconnect(hsotg);
 	}
 
 	/*
@@ -2962,9 +2960,6 @@ static int s3c_hsotg_udc_stop(struct usb_gadget *gadget,
 	if (!hsotg)
 		return -ENODEV;
 
-	if (!driver || driver != hsotg->driver || !driver->unbind)
-		return -EINVAL;
-
 	/* all endpoints should be shutdown */
 	for (ep = 0; ep < hsotg->num_of_eps; ep++)
 		s3c_hsotg_ep_disable(&hsotg->eps[ep].ep);
@@ -2972,15 +2967,15 @@ static int s3c_hsotg_udc_stop(struct usb_gadget *gadget,
 	spin_lock_irqsave(&hsotg->lock, flags);
 
 	s3c_hsotg_phy_disable(hsotg);
-	regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), hsotg->supplies);
 
-	hsotg->driver = NULL;
+	if (!driver)
+		hsotg->driver = NULL;
+
 	hsotg->gadget.speed = USB_SPEED_UNKNOWN;
 
 	spin_unlock_irqrestore(&hsotg->lock, flags);
 
-	dev_info(hsotg->dev, "unregistered gadget driver '%s'\n",
-		 driver->driver.name);
+	regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), hsotg->supplies);
 
 	return 0;
 }
diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
index 947b009009f111ba710954ea639962b4d4008463..4449f565d6c67ccb802aa7bc07f243802624f6ea 100644
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -669,7 +669,7 @@ static const struct hc_driver ehci_fsl_hc_driver = {
 	 * generic hardware linkage
 	 */
 	.irq = ehci_irq,
-	.flags = HCD_USB2 | HCD_MEMORY | HCD_BH,
+	.flags = HCD_USB2 | HCD_MEMORY,
 
 	/*
 	 * basic lifecycle operations
diff --git a/drivers/usb/host/ehci-grlib.c b/drivers/usb/host/ehci-grlib.c
index b52a66ce92e8592b123239aa24b724dddfd085fa..83ab51af250f158e735373760f8c008ce6fe0ad8 100644
--- a/drivers/usb/host/ehci-grlib.c
+++ b/drivers/usb/host/ehci-grlib.c
@@ -43,7 +43,7 @@ static const struct hc_driver ehci_grlib_hc_driver = {
 	 * generic hardware linkage
 	 */
 	.irq			= ehci_irq,
-	.flags			= HCD_MEMORY | HCD_USB2 | HCD_BH,
+	.flags			= HCD_MEMORY | HCD_USB2,
 
 	/*
 	 * basic lifecycle operations
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 5d6022f30ebe94b2228c6b38851217af1ee8f477..86ab9fd9fe9e938fc29cadeac72a935e8c26b8ff 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1158,7 +1158,7 @@ static const struct hc_driver ehci_hc_driver = {
 	 * generic hardware linkage
 	 */
 	.irq =			ehci_irq,
-	.flags =		HCD_MEMORY | HCD_USB2 | HCD_BH,
+	.flags =		HCD_MEMORY | HCD_USB2,
 
 	/*
 	 * basic lifecycle operations
diff --git a/drivers/usb/host/ehci-mv.c b/drivers/usb/host/ehci-mv.c
index 417c10da945078e37ddf20e7be290e996936074e..35cdbd88bbbef62a93a3aa869c12dbfda8183bf2 100644
--- a/drivers/usb/host/ehci-mv.c
+++ b/drivers/usb/host/ehci-mv.c
@@ -96,7 +96,7 @@ static const struct hc_driver mv_ehci_hc_driver = {
 	 * generic hardware linkage
 	 */
 	.irq = ehci_irq,
-	.flags = HCD_MEMORY | HCD_USB2 | HCD_BH,
+	.flags = HCD_MEMORY | HCD_USB2,
 
 	/*
 	 * basic lifecycle operations
diff --git a/drivers/usb/host/ehci-octeon.c b/drivers/usb/host/ehci-octeon.c
index ab0397e4d8f3eadae916d07434f4431f3d59def3..45cc00158412ac8a380cda88a28a4bb7536d62fa 100644
--- a/drivers/usb/host/ehci-octeon.c
+++ b/drivers/usb/host/ehci-octeon.c
@@ -51,7 +51,7 @@ static const struct hc_driver ehci_octeon_hc_driver = {
 	 * generic hardware linkage
 	 */
 	.irq			= ehci_irq,
-	.flags			= HCD_MEMORY | HCD_USB2 | HCD_BH,
+	.flags			= HCD_MEMORY | HCD_USB2,
 
 	/*
 	 * basic lifecycle operations
diff --git a/drivers/usb/host/ehci-pmcmsp.c b/drivers/usb/host/ehci-pmcmsp.c
index 893b707f0000abf0e323f39b28b6060a3293bcef..601e208bd782c07e9d0bb1b60d238ccbb7774758 100644
--- a/drivers/usb/host/ehci-pmcmsp.c
+++ b/drivers/usb/host/ehci-pmcmsp.c
@@ -286,7 +286,7 @@ static const struct hc_driver ehci_msp_hc_driver = {
 #else
 	.irq =			ehci_irq,
 #endif
-	.flags =		HCD_MEMORY | HCD_USB2 | HCD_BH,
+	.flags =		HCD_MEMORY | HCD_USB2,
 
 	/*
 	 * basic lifecycle operations
diff --git a/drivers/usb/host/ehci-ppc-of.c b/drivers/usb/host/ehci-ppc-of.c
index 6cc5567bf9c87faaa8c4a21dcb4202e8e6e7fb94..932293fa32de657de2e36ba091127e50009a6ff7 100644
--- a/drivers/usb/host/ehci-ppc-of.c
+++ b/drivers/usb/host/ehci-ppc-of.c
@@ -28,7 +28,7 @@ static const struct hc_driver ehci_ppc_of_hc_driver = {
 	 * generic hardware linkage
 	 */
 	.irq			= ehci_irq,
-	.flags			= HCD_MEMORY | HCD_USB2 | HCD_BH,
+	.flags			= HCD_MEMORY | HCD_USB2,
 
 	/*
 	 * basic lifecycle operations
diff --git a/drivers/usb/host/ehci-ps3.c b/drivers/usb/host/ehci-ps3.c
index 8188542ba17ea01214a3ab0f269fe07cb6cb1744..fd983771b02559cb56c6210e6813d9b223a80f7a 100644
--- a/drivers/usb/host/ehci-ps3.c
+++ b/drivers/usb/host/ehci-ps3.c
@@ -71,7 +71,7 @@ static const struct hc_driver ps3_ehci_hc_driver = {
 	.product_desc		= "PS3 EHCI Host Controller",
 	.hcd_priv_size		= sizeof(struct ehci_hcd),
 	.irq			= ehci_irq,
-	.flags			= HCD_MEMORY | HCD_USB2 | HCD_BH,
+	.flags			= HCD_MEMORY | HCD_USB2,
 	.reset			= ps3_ehci_hc_reset,
 	.start			= ehci_run,
 	.stop			= ehci_stop,
diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c
index e321804c34755553afcf3c1ceab38678ed27af1b..a7f776a13eb17133459f23ac584b60287e544197 100644
--- a/drivers/usb/host/ehci-q.c
+++ b/drivers/usb/host/ehci-q.c
@@ -247,6 +247,8 @@ static int qtd_copy_status (
 
 static void
 ehci_urb_done(struct ehci_hcd *ehci, struct urb *urb, int status)
+__releases(ehci->lock)
+__acquires(ehci->lock)
 {
 	if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT) {
 		/* ... update hc-wide periodic stats */
@@ -272,8 +274,11 @@ ehci_urb_done(struct ehci_hcd *ehci, struct urb *urb, int status)
 		urb->actual_length, urb->transfer_buffer_length);
 #endif
 
+	/* complete() can reenter this HCD */
 	usb_hcd_unlink_urb_from_ep(ehci_to_hcd(ehci), urb);
+	spin_unlock (&ehci->lock);
 	usb_hcd_giveback_urb(ehci_to_hcd(ehci), urb, status);
+	spin_lock (&ehci->lock);
 }
 
 static int qh_schedule (struct ehci_hcd *ehci, struct ehci_qh *qh);
diff --git a/drivers/usb/host/ehci-sead3.c b/drivers/usb/host/ehci-sead3.c
index 8a734498079bc176938c57a6b132c146e9be00dd..b2de52d3961488f249aeb9d4026efe2d603b72bb 100644
--- a/drivers/usb/host/ehci-sead3.c
+++ b/drivers/usb/host/ehci-sead3.c
@@ -55,7 +55,7 @@ const struct hc_driver ehci_sead3_hc_driver = {
 	 * generic hardware linkage
 	 */
 	.irq			= ehci_irq,
-	.flags			= HCD_MEMORY | HCD_USB2 | HCD_BH,
+	.flags			= HCD_MEMORY | HCD_USB2,
 
 	/*
 	 * basic lifecycle operations
diff --git a/drivers/usb/host/ehci-sh.c b/drivers/usb/host/ehci-sh.c
index dc899eb2b86183561351d78e8dba1ceffc9cbb18..93e59a13bc1fec919ef81690bbce9f4bdcd3e951 100644
--- a/drivers/usb/host/ehci-sh.c
+++ b/drivers/usb/host/ehci-sh.c
@@ -36,7 +36,7 @@ static const struct hc_driver ehci_sh_hc_driver = {
 	 * generic hardware linkage
 	 */
 	.irq				= ehci_irq,
-	.flags				= HCD_USB2 | HCD_MEMORY | HCD_BH,
+	.flags				= HCD_USB2 | HCD_MEMORY,
 
 	/*
 	 * basic lifecycle operations
diff --git a/drivers/usb/host/ehci-tilegx.c b/drivers/usb/host/ehci-tilegx.c
index 67026ffbf9a871c9780a4b0b7f0d6c739c904e73..cca4be90a864dba009c852f606653fb5fe60d568 100644
--- a/drivers/usb/host/ehci-tilegx.c
+++ b/drivers/usb/host/ehci-tilegx.c
@@ -61,7 +61,7 @@ static const struct hc_driver ehci_tilegx_hc_driver = {
 	 * Generic hardware linkage.
 	 */
 	.irq			= ehci_irq,
-	.flags			= HCD_MEMORY | HCD_USB2 | HCD_BH,
+	.flags			= HCD_MEMORY | HCD_USB2,
 
 	/*
 	 * Basic lifecycle operations.
diff --git a/drivers/usb/host/ehci-w90x900.c b/drivers/usb/host/ehci-w90x900.c
index 1c370dfbee0d35e6a3cf2b1288836df2116599c5..59e0e24c753febfb76369be8f872cb3731c2f365 100644
--- a/drivers/usb/host/ehci-w90x900.c
+++ b/drivers/usb/host/ehci-w90x900.c
@@ -108,7 +108,7 @@ static const struct hc_driver ehci_w90x900_hc_driver = {
 	 * generic hardware linkage
 	 */
 	.irq = ehci_irq,
-	.flags = HCD_USB2|HCD_MEMORY|HCD_BH,
+	.flags = HCD_USB2|HCD_MEMORY,
 
 	/*
 	 * basic lifecycle operations
diff --git a/drivers/usb/host/ehci-xilinx-of.c b/drivers/usb/host/ehci-xilinx-of.c
index 95979f9f4381d8e8e573c7e0fe254d5585d23ab8..eba962e6ebfbbd8ffdd46a85e0fed5ec9b18b78a 100644
--- a/drivers/usb/host/ehci-xilinx-of.c
+++ b/drivers/usb/host/ehci-xilinx-of.c
@@ -79,7 +79,7 @@ static const struct hc_driver ehci_xilinx_of_hc_driver = {
 	 * generic hardware linkage
 	 */
 	.irq			= ehci_irq,
-	.flags			= HCD_MEMORY | HCD_USB2 | HCD_BH,
+	.flags			= HCD_MEMORY | HCD_USB2,
 
 	/*
 	 * basic lifecycle operations
diff --git a/drivers/usb/host/fsl-mph-dr-of.c b/drivers/usb/host/fsl-mph-dr-of.c
index 9e0020d9e4c8cc01353ef4b804a9ba9d50bc8cfd..abd5050a4899bdb4518294175477a418583c4e83 100644
--- a/drivers/usb/host/fsl-mph-dr-of.c
+++ b/drivers/usb/host/fsl-mph-dr-of.c
@@ -24,7 +24,7 @@ struct fsl_usb2_dev_data {
 	enum fsl_usb2_operating_modes op_mode;	/* operating mode */
 };
 
-struct fsl_usb2_dev_data dr_mode_data[] = {
+static struct fsl_usb2_dev_data dr_mode_data[] = {
 	{
 		.dr_mode = "host",
 		.drivers = { "fsl-ehci", NULL, NULL, },
@@ -42,7 +42,7 @@ struct fsl_usb2_dev_data dr_mode_data[] = {
 	},
 };
 
-struct fsl_usb2_dev_data *get_dr_mode_data(struct device_node *np)
+static struct fsl_usb2_dev_data *get_dr_mode_data(struct device_node *np)
 {
 	const unsigned char *prop;
 	int i;
@@ -75,7 +75,7 @@ static enum fsl_usb2_phy_modes determine_usb_phy(const char *phy_type)
 	return FSL_USB2_PHY_NONE;
 }
 
-struct platform_device *fsl_usb2_device_register(
+static struct platform_device *fsl_usb2_device_register(
 					struct platform_device *ofdev,
 					struct fsl_usb2_platform_data *pdata,
 					const char *name, int id)
diff --git a/drivers/usb/phy/phy-omap-usb3.c b/drivers/usb/phy/phy-omap-usb3.c
index fc15694d3031bbf83b76e932914e44251280d491..4e8a0405f956c478491a1ed6f18d65a9afc07e9a 100644
--- a/drivers/usb/phy/phy-omap-usb3.c
+++ b/drivers/usb/phy/phy-omap-usb3.c
@@ -79,7 +79,7 @@ static struct usb_dpll_params *omap_usb3_get_dpll_params(unsigned long rate)
 			return &dpll_map[i].params;
 	}
 
-	return 0;
+	return NULL;
 }
 
 static int omap_usb3_suspend(struct usb_phy *x, int suspend)
diff --git a/drivers/usb/serial/Kconfig b/drivers/usb/serial/Kconfig
index c454bfa22a106184bbaee567e4f49fbad5d8d057..ddb9c51f2c999c04a27aab9d7a2924c429205672 100644
--- a/drivers/usb/serial/Kconfig
+++ b/drivers/usb/serial/Kconfig
@@ -60,7 +60,7 @@ config USB_SERIAL_SIMPLE
 		- Suunto ANT+ USB device.
 		- Fundamental Software dongle.
 		- HP4x calculators
-		- a number of Motoroloa phones
+		- a number of Motorola phones
 		- Siemens USB/MPI adapter.
 		- ViVOtech ViVOpay USB device.
 		- Infineon Modem Flashloader USB interface
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index e7a84f0f517969fec4bbb59ac270eeb97fbf22d3..bedf8e47713be02dfc80b8a2e3512cb24a455a15 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -139,6 +139,7 @@ enum pl2303_type {
 	HX_TA,		/* HX(A) / X(A) / TA version  */ /* TODO: improve */
 	HXD_EA_RA_SA,	/* HXD / EA / RA / SA version */ /* TODO: improve */
 	TB,		/* TB version */
+	HX_CLONE,	/* Cheap and less functional clone of the HX chip */
 };
 /*
  * NOTE: don't know the difference between type 0 and type 1,
@@ -206,8 +207,23 @@ static int pl2303_startup(struct usb_serial *serial)
 		 * the device descriptors of the X/HX, HXD, EA, RA, SA, TA, TB
 		 */
 		if (le16_to_cpu(serial->dev->descriptor.bcdDevice) == 0x300) {
-			type = HX_TA;
-			type_str = "X/HX/TA";
+			/* Check if the device is a clone */
+			pl2303_vendor_read(0x9494, 0, serial, buf);
+			/*
+			 * NOTE: Not sure if this read is really needed.
+			 * The HX returns 0x00, the clone 0x02, but the Windows
+			 * driver seems to ignore the value and continues.
+			 */
+			pl2303_vendor_write(0x0606, 0xaa, serial);
+			pl2303_vendor_read(0x8686, 0, serial, buf);
+			if (buf[0] != 0xaa) {
+				type = HX_CLONE;
+				type_str = "X/HX clone (limited functionality)";
+			} else {
+				type = HX_TA;
+				type_str = "X/HX/TA";
+			}
+			pl2303_vendor_write(0x0606, 0x00, serial);
 		} else if (le16_to_cpu(serial->dev->descriptor.bcdDevice)
 								     == 0x400) {
 			type = HXD_EA_RA_SA;
@@ -305,8 +321,9 @@ static int pl2303_baudrate_encode_direct(int baud, enum pl2303_type type,
 {
 	/*
 	 * NOTE: Only the values defined in baud_sup are supported !
-	 *       => if unsupported values are set, the PL2303 seems to
-	 *	    use 9600 baud (at least my PL2303X always does)
+	 * => if unsupported values are set, the PL2303 uses 9600 baud instead
+	 * => HX clones just don't work at unsupported baud rates < 115200 baud,
+	 *    for baud rates > 115200 they run at 115200 baud
 	 */
 	const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600,
 				 4800, 7200, 9600, 14400, 19200, 28800, 38400,
@@ -316,14 +333,14 @@ static int pl2303_baudrate_encode_direct(int baud, enum pl2303_type type,
 	 * NOTE: With the exception of type_0/1 devices, the following
 	 * additional baud rates are supported (tested with HX rev. 3A only):
 	 * 110*, 56000*, 128000, 134400, 161280, 201600, 256000*, 268800,
-	 * 403200, 806400.	(*: not HX)
+	 * 403200, 806400.	(*: not HX and HX clones)
 	 *
 	 * Maximum values: HXD, TB: 12000000; HX, TA: 6000000;
-	 *                 type_0+1: 1228800; RA: 921600; SA: 115200
+	 *                 type_0+1: 1228800; RA: 921600; HX clones, SA: 115200
 	 *
 	 * As long as we are not using this encoding method for anything else
-	 * than the type_0+1 and HX chips, there is no point in complicating
-	 * the code to support them.
+	 * than the type_0+1, HX and HX clone chips, there is no point in
+	 * complicating the code to support them.
 	 */
 	int i;
 
@@ -347,6 +364,8 @@ static int pl2303_baudrate_encode_direct(int baud, enum pl2303_type type,
 		baud = min_t(int, baud, 6000000);
 	else if (type == type_0 || type == type_1)
 		baud = min_t(int, baud, 1228800);
+	else if (type == HX_CLONE)
+		baud = min_t(int, baud, 115200);
 	/* Direct (standard) baud rate encoding method */
 	put_unaligned_le32(baud, buf);
 
@@ -359,7 +378,8 @@ static int pl2303_baudrate_encode_divisor(int baud, enum pl2303_type type,
 	/*
 	 * Divisor based baud rate encoding method
 	 *
-	 * NOTE: it's not clear if the type_0/1 chips support this method
+	 * NOTE: HX clones do NOT support this method.
+	 * It's not clear if the type_0/1 chips support it.
 	 *
 	 * divisor = 12MHz * 32 / baudrate = 2^A * B
 	 *
@@ -452,7 +472,7 @@ static void pl2303_encode_baudrate(struct tty_struct *tty,
 	 * 1) Direct method: encodes the baud rate value directly
 	 *    => supported by all chip types
 	 * 2) Divisor based method: encodes a divisor to a base value (12MHz*32)
-	 *    => supported by HX chips (and likely not by type_0/1 chips)
+	 *    => not supported by HX clones (and likely type_0/1 chips)
 	 *
 	 * NOTE: Although the divisor based baud rate encoding method is much
 	 * more flexible, some of the standard baud rate values can not be
@@ -460,7 +480,7 @@ static void pl2303_encode_baudrate(struct tty_struct *tty,
 	 * the device likely uses the same baud rate generator for both methods
 	 * so that there is likley no difference.
 	 */
-	if (type == type_0 || type == type_1)
+	if (type == type_0 || type == type_1 || type == HX_CLONE)
 		baud = pl2303_baudrate_encode_direct(baud, type, buf);
 	else
 		baud = pl2303_baudrate_encode_divisor(baud, type, buf);
@@ -813,6 +833,7 @@ static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
 	result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
 				 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
 				 0, NULL, 0, 100);
+	/* NOTE: HX clones don't support sending breaks, -EPIPE is returned */
 	if (result)
 		dev_err(&port->dev, "error sending break = %d\n", result);
 }