Merge tag 'usb-for-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next

Felipe writes:

usb: patches for v4.10 merge window

One big merge this time with a total of 166 non-merge commits.

Most of the work, by far, is on dwc2 this time (68.2%) with dwc3 a far
second (22.5%). The remaining 9.3% are scattered on gadget drivers.

The most important changes for dwc2 are the peripheral side DMA support
implemented by Synopsys folks and support for the new IOT dwc2
compatible core from Synopsys.

In dwc3 land we have support for high-bandwidth, high-speed isochronous
endpoints and some non-critical fixes for large scatter lists.

Apart from these, we have our usual set of cleanups, non-critical fixes,
etc.

24 files changed, 159 insertions, 114 deletions

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 32176f7..41ab61f 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -201,7 +201,12 @@ ep_found:
 	_ep->desc = chosen_desc;
 	_ep->comp_desc = NULL;
 	_ep->maxburst = 0;
-	_ep->mult = 0;
+	_ep->mult = 1;
+
+	if (g->speed == USB_SPEED_HIGH && (usb_endpoint_xfer_isoc(_ep->desc) ||
+				usb_endpoint_xfer_int(_ep->desc)))
+		_ep->mult = usb_endpoint_maxp_mult(_ep->desc);
+
 	if (!want_comp_desc)
 		return 0;
 
@@ -218,7 +223,7 @@ ep_found:
 		switch (usb_endpoint_type(_ep->desc)) {
 		case USB_ENDPOINT_XFER_ISOC:
 			/* mult: bits 1:0 of bmAttributes */
-			_ep->mult = comp_desc->bmAttributes & 0x3;
+			_ep->mult = (comp_desc->bmAttributes & 0x3) + 1;
 		case USB_ENDPOINT_XFER_BULK:
 		case USB_ENDPOINT_XFER_INT:
 			_ep->maxburst = comp_desc->bMaxBurst + 1;
@@ -2382,18 +2387,8 @@ EXPORT_SYMBOL_GPL(usb_composite_setup_continue);
 
 static char *composite_default_mfr(struct usb_gadget *gadget)
 {
-	char *mfr;
-	int len;
-
-	len = snprintf(NULL, 0, "%s %s with %s", init_utsname()->sysname,
-			init_utsname()->release, gadget->name);
-	len++;
-	mfr = kmalloc(len, GFP_KERNEL);
-	if (!mfr)
-		return NULL;
-	snprintf(mfr, len, "%s %s with %s", init_utsname()->sysname,
-			init_utsname()->release, gadget->name);
-	return mfr;
+	return kasprintf(GFP_KERNEL, "%s %s with %s", init_utsname()->sysname,
+			 init_utsname()->release, gadget->name);
 }
 
 void usb_composite_overwrite_options(struct usb_composite_dev *cdev,
diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index e40d47d..dff72a8 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -266,7 +266,7 @@ static void ffs_ep0_complete(struct usb_ep *ep, struct usb_request *req)
 {
 	struct ffs_data *ffs = req->context;
 
-	complete_all(&ffs->ep0req_completion);
+	complete(&ffs->ep0req_completion);
 }
 
 static int __ffs_ep0_queue_wait(struct ffs_data *ffs, char *data, size_t len)
diff --git a/drivers/usb/gadget/function/f_hid.c b/drivers/usb/gadget/function/f_hid.c
index e2966f8..7abd70b 100644
--- a/drivers/usb/gadget/function/f_hid.c
+++ b/drivers/usb/gadget/function/f_hid.c
@@ -98,6 +98,60 @@ static struct hid_descriptor hidg_desc = {
 	/*.desc[0].wDescriptorLenght	= DYNAMIC */
 };
 
+/* Super-Speed Support */
+
+static struct usb_endpoint_descriptor hidg_ss_in_ep_desc = {
+	.bLength		= USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType	= USB_DT_ENDPOINT,
+	.bEndpointAddress	= USB_DIR_IN,
+	.bmAttributes		= USB_ENDPOINT_XFER_INT,
+	/*.wMaxPacketSize	= DYNAMIC */
+	.bInterval		= 4, /* FIXME: Add this field in the
+				      * HID gadget configuration?
+				      * (struct hidg_func_descriptor)
+				      */
+};
+
+static struct usb_ss_ep_comp_descriptor hidg_ss_in_comp_desc = {
+	.bLength                = sizeof(hidg_ss_in_comp_desc),
+	.bDescriptorType        = USB_DT_SS_ENDPOINT_COMP,
+
+	/* .bMaxBurst           = 0, */
+	/* .bmAttributes        = 0, */
+	/* .wBytesPerInterval   = DYNAMIC */
+};
+
+static struct usb_endpoint_descriptor hidg_ss_out_ep_desc = {
+	.bLength		= USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType	= USB_DT_ENDPOINT,
+	.bEndpointAddress	= USB_DIR_OUT,
+	.bmAttributes		= USB_ENDPOINT_XFER_INT,
+	/*.wMaxPacketSize	= DYNAMIC */
+	.bInterval		= 4, /* FIXME: Add this field in the
+				      * HID gadget configuration?
+				      * (struct hidg_func_descriptor)
+				      */
+};
+
+static struct usb_ss_ep_comp_descriptor hidg_ss_out_comp_desc = {
+	.bLength                = sizeof(hidg_ss_out_comp_desc),
+	.bDescriptorType        = USB_DT_SS_ENDPOINT_COMP,
+
+	/* .bMaxBurst           = 0, */
+	/* .bmAttributes        = 0, */
+	/* .wBytesPerInterval   = DYNAMIC */
+};
+
+static struct usb_descriptor_header *hidg_ss_descriptors[] = {
+	(struct usb_descriptor_header *)&hidg_interface_desc,
+	(struct usb_descriptor_header *)&hidg_desc,
+	(struct usb_descriptor_header *)&hidg_ss_in_ep_desc,
+	(struct usb_descriptor_header *)&hidg_ss_in_comp_desc,
+	(struct usb_descriptor_header *)&hidg_ss_out_ep_desc,
+	(struct usb_descriptor_header *)&hidg_ss_out_comp_desc,
+	NULL,
+};
+
 /* High-Speed Support */
 
 static struct usb_endpoint_descriptor hidg_hs_in_ep_desc = {
@@ -624,8 +678,14 @@ static int hidg_bind(struct usb_configuration *c, struct usb_function *f)
 	/* set descriptor dynamic values */
 	hidg_interface_desc.bInterfaceSubClass = hidg->bInterfaceSubClass;
 	hidg_interface_desc.bInterfaceProtocol = hidg->bInterfaceProtocol;
+	hidg_ss_in_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
+	hidg_ss_in_comp_desc.wBytesPerInterval =
+				cpu_to_le16(hidg->report_length);
 	hidg_hs_in_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
 	hidg_fs_in_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
+	hidg_ss_out_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
+	hidg_ss_out_comp_desc.wBytesPerInterval =
+				cpu_to_le16(hidg->report_length);
 	hidg_hs_out_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
 	hidg_fs_out_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
 	/*
@@ -641,8 +701,13 @@ static int hidg_bind(struct usb_configuration *c, struct usb_function *f)
 	hidg_hs_out_ep_desc.bEndpointAddress =
 		hidg_fs_out_ep_desc.bEndpointAddress;
 
+	hidg_ss_in_ep_desc.bEndpointAddress =
+		hidg_fs_in_ep_desc.bEndpointAddress;
+	hidg_ss_out_ep_desc.bEndpointAddress =
+		hidg_fs_out_ep_desc.bEndpointAddress;
+
 	status = usb_assign_descriptors(f, hidg_fs_descriptors,
-			hidg_hs_descriptors, NULL, NULL);
+			hidg_hs_descriptors, hidg_ss_descriptors, NULL);
 	if (status)
 		goto fail;
 
diff --git a/drivers/usb/gadget/function/f_ncm.c b/drivers/usb/gadget/function/f_ncm.c
index 6396037..e8008fa 100644
--- a/drivers/usb/gadget/function/f_ncm.c
+++ b/drivers/usb/gadget/function/f_ncm.c
@@ -998,7 +998,7 @@ static struct sk_buff *package_for_tx(struct f_ncm *ncm)
 	/* Merge the skbs */
 	swap(skb2, ncm->skb_tx_data);
 	if (ncm->skb_tx_data) {
-		dev_kfree_skb_any(ncm->skb_tx_data);
+		dev_consume_skb_any(ncm->skb_tx_data);
 		ncm->skb_tx_data = NULL;
 	}
 
@@ -1009,7 +1009,7 @@ static struct sk_buff *package_for_tx(struct f_ncm *ncm)
 	/* Copy NTB across. */
 	ntb_iter = (void *) skb_put(skb2, ncm->skb_tx_ndp->len);
 	memcpy(ntb_iter, ncm->skb_tx_ndp->data, ncm->skb_tx_ndp->len);
-	dev_kfree_skb_any(ncm->skb_tx_ndp);
+	dev_consume_skb_any(ncm->skb_tx_ndp);
 	ncm->skb_tx_ndp = NULL;
 
 	/* Insert zero'd datagram. */
@@ -1078,6 +1078,7 @@ static struct sk_buff *ncm_wrap_ntb(struct gether *port,
 			if (!ncm->skb_tx_data)
 				goto err;
 
+			ncm->skb_tx_data->dev = ncm->netdev;
 			ntb_data = (void *) skb_put(ncm->skb_tx_data, ncb_len);
 			memset(ntb_data, 0, ncb_len);
 			/* dwSignature */
@@ -1096,6 +1097,8 @@ static struct sk_buff *ncm_wrap_ntb(struct gether *port,
 						    GFP_ATOMIC);
 			if (!ncm->skb_tx_ndp)
 				goto err;
+
+			ncm->skb_tx_ndp->dev = ncm->netdev;
 			ntb_ndp = (void *) skb_put(ncm->skb_tx_ndp,
 						    opts->ndp_size);
 			memset(ntb_ndp, 0, ncb_len);
@@ -1133,7 +1136,7 @@ static struct sk_buff *ncm_wrap_ntb(struct gether *port,
 		memset(ntb_data, 0, dgram_pad);
 		ntb_data = (void *) skb_put(ncm->skb_tx_data, skb->len);
 		memcpy(ntb_data, skb->data, skb->len);
-		dev_kfree_skb_any(skb);
+		dev_consume_skb_any(skb);
 		skb = NULL;
 
 	} else if (ncm->skb_tx_data && ncm->timer_force_tx) {
@@ -1329,7 +1332,7 @@ static int ncm_unwrap_ntb(struct gether *port,
 		} while (ndp_len > 2 * (opts->dgram_item_len * 2));
 	} while (ndp_index);
 
-	dev_kfree_skb_any(skb);
+	dev_consume_skb_any(skb);
 
 	VDBG(port->func.config->cdev,
 	     "Parsed NTB with %d frames\n", dgram_counter);
diff --git a/drivers/usb/gadget/function/f_uac2.c b/drivers/usb/gadget/function/f_uac2.c
index cd214ec..969cfe7 100644
--- a/drivers/usb/gadget/function/f_uac2.c
+++ b/drivers/usb/gadget/function/f_uac2.c
@@ -1067,13 +1067,13 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
 	agdev->out_ep = usb_ep_autoconfig(gadget, &fs_epout_desc);
 	if (!agdev->out_ep) {
 		dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
-		goto err;
+		return ret;
 	}
 
 	agdev->in_ep = usb_ep_autoconfig(gadget, &fs_epin_desc);
 	if (!agdev->in_ep) {
 		dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
-		goto err;
+		return ret;
 	}
 
 	uac2->p_prm.uac2 = uac2;
@@ -1091,7 +1091,7 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
 	ret = usb_assign_descriptors(fn, fs_audio_desc, hs_audio_desc, NULL,
 				     NULL);
 	if (ret)
-		goto err;
+		return ret;
 
 	prm = &agdev->uac2.c_prm;
 	prm->max_psize = hs_epout_desc.wMaxPacketSize;
@@ -1106,19 +1106,19 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
 	prm->rbuf = kzalloc(prm->max_psize * USB_XFERS, GFP_KERNEL);
 	if (!prm->rbuf) {
 		prm->max_psize = 0;
-		goto err_free_descs;
+		goto err;
 	}
 
 	ret = alsa_uac2_init(agdev);
 	if (ret)
-		goto err_free_descs;
+		goto err;
 	return 0;
 
-err_free_descs:
-	usb_free_all_descriptors(fn);
 err:
 	kfree(agdev->uac2.p_prm.rbuf);
 	kfree(agdev->uac2.c_prm.rbuf);
+err_free_descs:
+	usb_free_all_descriptors(fn);
 	return -EINVAL;
 }
 
diff --git a/drivers/usb/gadget/function/rndis.c b/drivers/usb/gadget/function/rndis.c
index 766c328..a3b5e46 100644
--- a/drivers/usb/gadget/function/rndis.c
+++ b/drivers/usb/gadget/function/rndis.c
@@ -80,8 +80,7 @@ static const struct file_operations rndis_proc_fops;
 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */
 
 /* supported OIDs */
-static const u32 oid_supported_list[] =
-{
+static const u32 oid_supported_list[] = {
 	/* the general stuff */
 	RNDIS_OID_GEN_SUPPORTED_LIST,
 	RNDIS_OID_GEN_HARDWARE_STATUS,
diff --git a/drivers/usb/gadget/function/rndis.h b/drivers/usb/gadget/function/rndis.h
index ef92eb6..21e0430 100644
--- a/drivers/usb/gadget/function/rndis.h
+++ b/drivers/usb/gadget/function/rndis.h
@@ -22,8 +22,7 @@
 #define RNDIS_MAXIMUM_FRAME_SIZE	1518
 #define RNDIS_MAX_TOTAL_SIZE		1558
 
-typedef struct rndis_init_msg_type
-{
+typedef struct rndis_init_msg_type {
 	__le32	MessageType;
 	__le32	MessageLength;
 	__le32	RequestID;
@@ -32,8 +31,7 @@ typedef struct rndis_init_msg_type
 	__le32	MaxTransferSize;
 } rndis_init_msg_type;
 
-typedef struct rndis_init_cmplt_type
-{
+typedef struct rndis_init_cmplt_type {
 	__le32	MessageType;
 	__le32	MessageLength;
 	__le32	RequestID;
@@ -49,15 +47,13 @@ typedef struct rndis_init_cmplt_type
 	__le32	AFListSize;
 } rndis_init_cmplt_type;
 
-typedef struct rndis_halt_msg_type
-{
+typedef struct rndis_halt_msg_type {
 	__le32	MessageType;
 	__le32	MessageLength;
 	__le32	RequestID;
 } rndis_halt_msg_type;
 
-typedef struct rndis_query_msg_type
-{
+typedef struct rndis_query_msg_type {
 	__le32	MessageType;
 	__le32	MessageLength;
 	__le32	RequestID;
@@ -67,8 +63,7 @@ typedef struct rndis_query_msg_type
 	__le32	DeviceVcHandle;
 } rndis_query_msg_type;
 
-typedef struct rndis_query_cmplt_type
-{
+typedef struct rndis_query_cmplt_type {
 	__le32	MessageType;
 	__le32	MessageLength;
 	__le32	RequestID;
@@ -77,8 +72,7 @@ typedef struct rndis_query_cmplt_type
 	__le32	InformationBufferOffset;
 } rndis_query_cmplt_type;
 
-typedef struct rndis_set_msg_type
-{
+typedef struct rndis_set_msg_type {
 	__le32	MessageType;
 	__le32	MessageLength;
 	__le32	RequestID;
@@ -88,31 +82,27 @@ typedef struct rndis_set_msg_type
 	__le32	DeviceVcHandle;
 } rndis_set_msg_type;
 
-typedef struct rndis_set_cmplt_type
-{
+typedef struct rndis_set_cmplt_type {
 	__le32	MessageType;
 	__le32	MessageLength;
 	__le32	RequestID;
 	__le32	Status;
 } rndis_set_cmplt_type;
 
-typedef struct rndis_reset_msg_type
-{
+typedef struct rndis_reset_msg_type {
 	__le32	MessageType;
 	__le32	MessageLength;
 	__le32	Reserved;
 } rndis_reset_msg_type;
 
-typedef struct rndis_reset_cmplt_type
-{
+typedef struct rndis_reset_cmplt_type {
 	__le32	MessageType;
 	__le32	MessageLength;
 	__le32	Status;
 	__le32	AddressingReset;
 } rndis_reset_cmplt_type;
 
-typedef struct rndis_indicate_status_msg_type
-{
+typedef struct rndis_indicate_status_msg_type {
 	__le32	MessageType;
 	__le32	MessageLength;
 	__le32	Status;
@@ -120,23 +110,20 @@ typedef struct rndis_indicate_status_msg_type
 	__le32	StatusBufferOffset;
 } rndis_indicate_status_msg_type;
 
-typedef struct rndis_keepalive_msg_type
-{
+typedef struct rndis_keepalive_msg_type {
 	__le32	MessageType;
 	__le32	MessageLength;
 	__le32	RequestID;
 } rndis_keepalive_msg_type;
 
-typedef struct rndis_keepalive_cmplt_type
-{
+typedef struct rndis_keepalive_cmplt_type {
 	__le32	MessageType;
 	__le32	MessageLength;
 	__le32	RequestID;
 	__le32	Status;
 } rndis_keepalive_cmplt_type;
 
-struct rndis_packet_msg_type
-{
+struct rndis_packet_msg_type {
 	__le32	MessageType;
 	__le32	MessageLength;
 	__le32	DataOffset;
@@ -150,8 +137,7 @@ struct rndis_packet_msg_type
 	__le32	Reserved;
 } __attribute__ ((packed));
 
-struct rndis_config_parameter
-{
+struct rndis_config_parameter {
 	__le32	ParameterNameOffset;
 	__le32	ParameterNameLength;
 	__le32	ParameterType;
@@ -160,23 +146,20 @@ struct rndis_config_parameter
 };
 
 /* implementation specific */
-enum rndis_state
-{
+enum rndis_state {
 	RNDIS_UNINITIALIZED,
 	RNDIS_INITIALIZED,
 	RNDIS_DATA_INITIALIZED,
 };
 
-typedef struct rndis_resp_t
-{
+typedef struct rndis_resp_t {
 	struct list_head	list;
 	u8			*buf;
 	u32			length;
 	int			send;
 } rndis_resp_t;
 
-typedef struct rndis_params
-{
+typedef struct rndis_params {
 	int			confignr;
 	u8			used;
 	u16			saved_filter;
diff --git a/drivers/usb/gadget/function/u_ether.c b/drivers/usb/gadget/function/u_ether.c
index 5d1bd13..119a2e5 100644
--- a/drivers/usb/gadget/function/u_ether.c
+++ b/drivers/usb/gadget/function/u_ether.c
@@ -224,7 +224,7 @@ rx_submit(struct eth_dev *dev, struct usb_request *req, gfp_t gfp_flags)
 	if (dev->port_usb->is_fixed)
 		size = max_t(size_t, size, dev->port_usb->fixed_out_len);
 
-	skb = alloc_skb(size + NET_IP_ALIGN, gfp_flags);
+	skb = __netdev_alloc_skb(dev->net, size + NET_IP_ALIGN, gfp_flags);
 	if (skb == NULL) {
 		DBG(dev, "no rx skb\n");
 		goto enomem;
@@ -455,16 +455,17 @@ static void tx_complete(struct usb_ep *ep, struct usb_request *req)
 		/* FALLTHROUGH */
 	case -ECONNRESET:		/* unlink */
 	case -ESHUTDOWN:		/* disconnect etc */
+		dev_kfree_skb_any(skb);
 		break;
 	case 0:
 		dev->net->stats.tx_bytes += skb->len;
+		dev_consume_skb_any(skb);
 	}
 	dev->net->stats.tx_packets++;
 
 	spin_lock(&dev->req_lock);
 	list_add(&req->list, &dev->tx_reqs);
 	spin_unlock(&dev->req_lock);
-	dev_kfree_skb_any(skb);
 
 	atomic_dec(&dev->tx_qlen);
 	if (netif_carrier_ok(dev->net))
diff --git a/drivers/usb/gadget/function/u_serial.c b/drivers/usb/gadget/function/u_serial.c
index 62ec842..000677c 100644
--- a/drivers/usb/gadget/function/u_serial.c
+++ b/drivers/usb/gadget/function/u_serial.c
@@ -1256,7 +1256,8 @@ static void gserial_console_exit(void)
 	struct gscons_info *info = &gscons_info;
 
 	unregister_console(&gserial_cons);
-	kthread_stop(info->console_thread);
+	if (info->console_thread != NULL)
+		kthread_stop(info->console_thread);
 	gs_buf_free(&info->con_buf);
 }
 
diff --git a/drivers/usb/gadget/function/uvc.h b/drivers/usb/gadget/function/uvc.h
index 7d3bb62..11d70de 100644
--- a/drivers/usb/gadget/function/uvc.h
+++ b/drivers/usb/gadget/function/uvc.h
@@ -26,14 +26,12 @@
 #define UVC_EVENT_DATA			(V4L2_EVENT_PRIVATE_START + 5)
 #define UVC_EVENT_LAST			(V4L2_EVENT_PRIVATE_START + 5)
 
-struct uvc_request_data
-{
+struct uvc_request_data {
 	__s32 length;
 	__u8 data[60];
 };
 
-struct uvc_event
-{
+struct uvc_event {
 	union {
 		enum usb_device_speed speed;
 		struct usb_ctrlrequest req;
@@ -104,8 +102,7 @@ extern unsigned int uvc_gadget_trace_param;
  * Structures
  */
 
-struct uvc_video
-{
+struct uvc_video {
 	struct usb_ep *ep;
 
 	/* Frame parameters */
@@ -134,15 +131,13 @@ struct uvc_video
 	unsigned int fid;
 };
 
-enum uvc_state
-{
+enum uvc_state {
 	UVC_STATE_DISCONNECTED,
 	UVC_STATE_CONNECTED,
 	UVC_STATE_STREAMING,
 };
 
-struct uvc_device
-{
+struct uvc_device {
 	struct video_device vdev;
 	struct v4l2_device v4l2_dev;
 	enum uvc_state state;
@@ -175,8 +170,7 @@ static inline struct uvc_device *to_uvc(struct usb_function *f)
 	return container_of(f, struct uvc_device, func);
 }
 
-struct uvc_file_handle
-{
+struct uvc_file_handle {
 	struct v4l2_fh vfh;
 	struct uvc_video *device;
 };
diff --git a/drivers/usb/gadget/function/uvc_v4l2.c b/drivers/usb/gadget/function/uvc_v4l2.c
index f4ccbd5..3e22b45 100644
--- a/drivers/usb/gadget/function/uvc_v4l2.c
+++ b/drivers/usb/gadget/function/uvc_v4l2.c
@@ -53,8 +53,7 @@ uvc_send_response(struct uvc_device *uvc, struct uvc_request_data *data)
  * V4L2 ioctls
  */
 
-struct uvc_format
-{
+struct uvc_format {
 	u8 bpp;
 	u32 fcc;
 };
diff --git a/drivers/usb/gadget/function/uvc_video.c b/drivers/usb/gadget/function/uvc_video.c
index 3d0d5d9..0f01c04 100644
--- a/drivers/usb/gadget/function/uvc_video.c
+++ b/drivers/usb/gadget/function/uvc_video.c
@@ -243,7 +243,7 @@ uvc_video_alloc_requests(struct uvc_video *video)
 
 	req_size = video->ep->maxpacket
 		 * max_t(unsigned int, video->ep->maxburst, 1)
-		 * (video->ep->mult + 1);
+		 * (video->ep->mult);
 
 	for (i = 0; i < UVC_NUM_REQUESTS; ++i) {
 		video->req_buffer[i] = kmalloc(req_size, GFP_KERNEL);
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index 1ef7a9a..f3212db 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -529,7 +529,7 @@ usba_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 
 	DBG(DBG_GADGET, "%s: ep_enable: desc=%p\n", ep->ep.name, desc);
 
-	maxpacket = usb_endpoint_maxp(desc) & 0x7ff;
+	maxpacket = usb_endpoint_maxp(desc);
 
 	if (((desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK) != ep->index)
 			|| ep->index == 0
@@ -573,7 +573,7 @@ usba_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 		 * Bits 11:12 specify number of _additional_
 		 * transactions per microframe.
 		 */
-		nr_trans = ((usb_endpoint_maxp(desc) >> 11) & 3) + 1;
+		nr_trans = usb_endpoint_maxp_mult(desc);
 		if (nr_trans > 3)
 			return -EINVAL;
 
diff --git a/drivers/usb/gadget/udc/bdc/bdc_cmd.c b/drivers/usb/gadget/udc/bdc/bdc_cmd.c
index 4d5e918..6e920f1 100644
--- a/drivers/usb/gadget/udc/bdc/bdc_cmd.c
+++ b/drivers/usb/gadget/udc/bdc/bdc_cmd.c
@@ -182,7 +182,7 @@ int bdc_config_ep(struct bdc *bdc, struct bdc_ep *ep)
 					usb_endpoint_xfer_int(desc)) {
 			param2 |= si;
 
-			mbs = (usb_endpoint_maxp(desc) & 0x1800) >> 11;
+			mbs = usb_endpoint_maxp_mult(desc);
 			param2 |= mbs << MB_SHIFT;
 		}
 		break;
diff --git a/drivers/usb/gadget/udc/bdc/bdc_ep.c b/drivers/usb/gadget/udc/bdc/bdc_ep.c
index ccaa74a..ff1ef24 100644
--- a/drivers/usb/gadget/udc/bdc/bdc_ep.c
+++ b/drivers/usb/gadget/udc/bdc/bdc_ep.c
@@ -446,7 +446,7 @@ static int setup_bd_list_xfr(struct bdc *bdc, struct bdc_req *req, int num_bds)
 	bd_xfr->start_bdi = bd_list->eqp_bdi;
 	bd = bdi_to_bd(ep, bd_list->eqp_bdi);
 	req_len = req->usb_req.length;
-	maxp = usb_endpoint_maxp(ep->desc) & 0x7ff;
+	maxp = usb_endpoint_maxp(ep->desc);
 	tfs = roundup(req->usb_req.length, maxp);
 	tfs = tfs/maxp;
 	dev_vdbg(bdc->dev, "%s ep:%s num_bds:%d tfs:%d r_len:%d bd:%p\n",
diff --git a/drivers/usb/gadget/udc/dummy_hcd.c b/drivers/usb/gadget/udc/dummy_hcd.c
index 77d0790..02b14e9 100644
--- a/drivers/usb/gadget/udc/dummy_hcd.c
+++ b/drivers/usb/gadget/udc/dummy_hcd.c
@@ -503,7 +503,7 @@ static int dummy_enable(struct usb_ep *_ep,
 	 * maximum packet size.
 	 * For SS devices the wMaxPacketSize is limited by 1024.
 	 */
-	max = usb_endpoint_maxp(desc) & 0x7ff;
+	max = usb_endpoint_maxp(desc);
 
 	/* drivers must not request bad settings, since lower levels
 	 * (hardware or its drivers) may not check.  some endpoints
@@ -1483,8 +1483,7 @@ static int periodic_bytes(struct dummy *dum, struct dummy_ep *ep)
 		int	tmp;
 
 		/* high bandwidth mode */
-		tmp = usb_endpoint_maxp(ep->desc);
-		tmp = (tmp >> 11) & 0x03;
+		tmp = usb_endpoint_maxp_mult(ep->desc);
 		tmp *= 8 /* applies to entire frame */;
 		limit += limit * tmp;
 	}
diff --git a/drivers/usb/gadget/udc/fsl_udc_core.c b/drivers/usb/gadget/udc/fsl_udc_core.c
index aab5221..71094e4 100644
--- a/drivers/usb/gadget/udc/fsl_udc_core.c
+++ b/drivers/usb/gadget/udc/fsl_udc_core.c
@@ -585,8 +585,7 @@ static int fsl_ep_enable(struct usb_ep *_ep,
 		break;
 	case USB_ENDPOINT_XFER_ISOC:
 		/* Calculate transactions needed for high bandwidth iso */
-		mult = (unsigned char)(1 + ((max >> 11) & 0x03));
-		max = max & 0x7ff;	/* bit 0~10 */
+		mult = usb_endpoint_maxp_mult(desc);
 		/* 3 transactions at most */
 		if (mult > 3)
 			goto en_done;
diff --git a/drivers/usb/gadget/udc/fusb300_udc.c b/drivers/usb/gadget/udc/fusb300_udc.c
index 948845c..42ff308 100644
--- a/drivers/usb/gadget/udc/fusb300_udc.c
+++ b/drivers/usb/gadget/udc/fusb300_udc.c
@@ -218,7 +218,7 @@ static int config_ep(struct fusb300_ep *ep,
 	   (info.type == USB_ENDPOINT_XFER_ISOC)) {
 		info.interval = desc->bInterval;
 		if (info.type == USB_ENDPOINT_XFER_ISOC)
-			info.bw_num = ((desc->wMaxPacketSize & 0x1800) >> 11);
+			info.bw_num = usb_endpoint_maxp_mult(desc);
 	}
 
 	ep_fifo_setting(fusb300, info);
diff --git a/drivers/usb/gadget/udc/gr_udc.c b/drivers/usb/gadget/udc/gr_udc.c
index 39b7136..b16f8af 100644
--- a/drivers/usb/gadget/udc/gr_udc.c
+++ b/drivers/usb/gadget/udc/gr_udc.c
@@ -1539,7 +1539,7 @@ static int gr_ep_enable(struct usb_ep *_ep,
 	 * additional transactions.
 	 */
 	max = 0x7ff & usb_endpoint_maxp(desc);
-	nt = 0x3 & (usb_endpoint_maxp(desc) >> 11);
+	nt = usb_endpoint_maxp_mult(desc) - 1;
 	buffer_size = GR_BUFFER_SIZE(epctrl);
 	if (nt && (mode == 0 || mode == 2)) {
 		dev_err(dev->dev,
diff --git a/drivers/usb/gadget/udc/mv_u3d_core.c b/drivers/usb/gadget/udc/mv_u3d_core.c
index b9e19a5..8d726bd 100644
--- a/drivers/usb/gadget/udc/mv_u3d_core.c
+++ b/drivers/usb/gadget/udc/mv_u3d_core.c
@@ -462,6 +462,12 @@ static int mv_u3d_req_to_trb(struct mv_u3d_req *req)
 					req->trb_head->trb_hw,
 					trb_num * sizeof(*trb_hw),
 					DMA_BIDIRECTIONAL);
+		if (dma_mapping_error(u3d->gadget.dev.parent,
+					req->trb_head->trb_dma)) {
+			kfree(req->trb_head->trb_hw);
+			kfree(req->trb_head);
+			return -EFAULT;
+		}
 
 		req->chain = 1;
 	}
@@ -487,30 +493,32 @@ mv_u3d_start_queue(struct mv_u3d_ep *ep)
 	ret = usb_gadget_map_request(&u3d->gadget, &req->req,
 					mv_u3d_ep_dir(ep));
 	if (ret)
-		return ret;
+		goto break_processing;
 
 	req->req.status = -EINPROGRESS;
 	req->req.actual = 0;
 	req->trb_count = 0;
 
-	/* build trbs and push them to device queue */
-	if (!mv_u3d_req_to_trb(req)) {
-		ret = mv_u3d_queue_trb(ep, req);
-		if (ret) {
-			ep->processing = 0;
-			return ret;
-		}
-	} else {
-		ep->processing = 0;
+	/* build trbs */
+	ret = mv_u3d_req_to_trb(req);
+	if (ret) {
 		dev_err(u3d->dev, "%s, mv_u3d_req_to_trb fail\n", __func__);
-		return -ENOMEM;
+		goto break_processing;
 	}
 
+	/* and push them to device queue */
+	ret = mv_u3d_queue_trb(ep, req);
+	if (ret)
+		goto break_processing;
+
 	/* irq handler advances the queue */
-	if (req)
-		list_add_tail(&req->queue, &ep->queue);
+	list_add_tail(&req->queue, &ep->queue);
 
 	return 0;
+
+break_processing:
+	ep->processing = 0;
+	return ret;
 }
 
 static int mv_u3d_ep_enable(struct usb_ep *_ep,
diff --git a/drivers/usb/gadget/udc/mv_udc_core.c b/drivers/usb/gadget/udc/mv_udc_core.c
index ce73b35..d82a91b 100644
--- a/drivers/usb/gadget/udc/mv_udc_core.c
+++ b/drivers/usb/gadget/udc/mv_udc_core.c
@@ -494,8 +494,7 @@ static int mv_ep_enable(struct usb_ep *_ep,
 		break;
 	case USB_ENDPOINT_XFER_ISOC:
 		/* Calculate transactions needed for high bandwidth iso */
-		mult = (unsigned char)(1 + ((max >> 11) & 0x03));
-		max = max & 0x7ff;	/* bit 0~10 */
+		mult = usb_endpoint_maxp_mult(desc);
 		/* 3 transactions at most */
 		if (mult > 3)
 			goto en_done;
diff --git a/drivers/usb/gadget/udc/net2272.c b/drivers/usb/gadget/udc/net2272.c
index 7c61134..078c91d 100644
--- a/drivers/usb/gadget/udc/net2272.c
+++ b/drivers/usb/gadget/udc/net2272.c
@@ -202,10 +202,10 @@ net2272_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 	if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
 		return -ESHUTDOWN;
 
-	max = usb_endpoint_maxp(desc) & 0x1fff;
+	max = usb_endpoint_maxp(desc);
 
 	spin_lock_irqsave(&dev->lock, flags);
-	_ep->maxpacket = max & 0x7fff;
+	_ep->maxpacket = max;
 	ep->desc = desc;
 
 	/* net2272_ep_reset() has already been called */
diff --git a/drivers/usb/gadget/udc/net2280.c b/drivers/usb/gadget/udc/net2280.c
index 61c938c..8550441 100644
--- a/drivers/usb/gadget/udc/net2280.c
+++ b/drivers/usb/gadget/udc/net2280.c
@@ -224,14 +224,14 @@ net2280_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 	}
 
 	/* sanity check ep-e/ep-f since their fifos are small */
-	max = usb_endpoint_maxp(desc) & 0x1fff;
+	max = usb_endpoint_maxp(desc);
 	if (ep->num > 4 && max > 64 && (dev->quirks & PLX_LEGACY)) {
 		ret = -ERANGE;
 		goto print_err;
 	}
 
 	spin_lock_irqsave(&dev->lock, flags);
-	_ep->maxpacket = max & 0x7ff;
+	_ep->maxpacket = max;
 	ep->desc = desc;
 
 	/* ep_reset() has already been called */
@@ -1839,7 +1839,7 @@ static ssize_t queues_show(struct device *_dev, struct device_attribute *attr,
 				ep->ep.name, t & USB_ENDPOINT_NUMBER_MASK,
 				(t & USB_DIR_IN) ? "in" : "out",
 				type_string(d->bmAttributes),
-				usb_endpoint_maxp(d) & 0x1fff,
+				usb_endpoint_maxp(d),
 				ep->dma ? "dma" : "pio", ep->fifo_size
 				);
 		} else /* ep0 should only have one transfer queued */
diff --git a/drivers/usb/gadget/udc/s3c2410_udc.c b/drivers/usb/gadget/udc/s3c2410_udc.c
index eb3571e..4643a01 100644
--- a/drivers/usb/gadget/udc/s3c2410_udc.c
+++ b/drivers/usb/gadget/udc/s3c2410_udc.c
@@ -1047,10 +1047,10 @@ static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
 	if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
 		return -ESHUTDOWN;
 
-	max = usb_endpoint_maxp(desc) & 0x1fff;
+	max = usb_endpoint_maxp(desc);
 
 	local_irq_save(flags);
-	_ep->maxpacket = max & 0x7ff;
+	_ep->maxpacket = max;
 	ep->ep.desc = desc;
 	ep->halted = 0;
 	ep->bEndpointAddress = desc->bEndpointAddress;