Merge tag 'usb-for-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next

Felipe writes:

USB: changes for v5.1 merge window

Dwc3 now works on TI's AM6xx platforms. Also on dwc3 we have a few
changes which improve request cancellation and some improvements to
how we print to the trace buffer.

Renesas_usb3 got support for r8a774c0 device.

Dwc2 got scatter-gather support.

Apart from these, the usual set of minor fixes and all sorts of small
details.

* tag 'usb-for-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb: (40 commits)
  usb: phy: twl6030-usb: fix possible use-after-free on remove
  usb: misc: usbtest: add super-speed isoc support
  usb: dwc3: Reset num_trbs after skipping
  usb: dwc3: gadget: don't enable interrupt when disabling endpoint
  fotg210-udc: pass struct device to DMA API functions
  fotg210-udc: remove a bogus dma_sync_single_for_device call
  usb: gadget: Change Andrzej Pietrasiewicz's e-mail address
  usb: f_fs: Avoid crash due to out-of-scope stack ptr access
  usb: dwc3: haps: Workaround matching VID PID
  usb: gadget: f_fs: preserve wMaxPacketSize across usb_ep_autoconfig() call
  usb: gadget: move non-super speed code out of usb_ep_autoconfig_ss()
  usb: gadget: function: sync f_uac1 ac header baInterfaceNr
  usb: dwc2: gadget: Add scatter-gather mode
  usb: gadget: fix various indentation issues
  usb: dwc2: Fix EP TxFIFO number setting
  udc: net2280: Fix net2280_disable
  USB: gadget: Improve kerneldoc for usb_ep_dequeue()
  usb: dwc3: debug: purge usage of strcat
  usb: dwc3: trace: pass trace buffer size to decoding functions
  usb: dwc3: gadget: remove DWC3_EP_END_TRANSFER_PENDING
  ...

32 files changed, 116 insertions, 107 deletions

diff --git a/drivers/usb/gadget/epautoconf.c b/drivers/usb/gadget/epautoconf.c
index 71b15c65b90f..1eb4fa2e623f 100644
--- a/drivers/usb/gadget/epautoconf.c
+++ b/drivers/usb/gadget/epautoconf.c
@@ -67,9 +67,6 @@ struct usb_ep *usb_ep_autoconfig_ss(
 )
 {
 	struct usb_ep	*ep;
-	u8		type;
-
-	type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
 
 	if (gadget->ops->match_ep) {
 		ep = gadget->ops->match_ep(gadget, desc, ep_comp);
@@ -109,16 +106,6 @@ found_ep:
 		desc->bEndpointAddress |= gadget->out_epnum;
 	}
 
-	/* report (variable) full speed bulk maxpacket */
-	if ((type == USB_ENDPOINT_XFER_BULK) && !ep_comp) {
-		int size = ep->maxpacket_limit;
-
-		/* min() doesn't work on bitfields with gcc-3.5 */
-		if (size > 64)
-			size = 64;
-		desc->wMaxPacketSize = cpu_to_le16(size);
-	}
-
 	ep->address = desc->bEndpointAddress;
 	ep->desc = NULL;
 	ep->comp_desc = NULL;
@@ -152,9 +139,10 @@ EXPORT_SYMBOL_GPL(usb_ep_autoconfig_ss);
  *
  * On success, this returns an claimed usb_ep, and modifies the endpoint
  * descriptor bEndpointAddress.  For bulk endpoints, the wMaxPacket value
- * is initialized as if the endpoint were used at full speed.  To prevent
- * the endpoint from being returned by a later autoconfig call, claims it
- * by assigning ep->claimed to true.
+ * is initialized as if the endpoint were used at full speed. Because of
+ * that the users must consider adjusting the autoconfigured descriptor.
+ * To prevent the endpoint from being returned by a later autoconfig call,
+ * claims it by assigning ep->claimed to true.
  *
  * On failure, this returns a null endpoint descriptor.
  */
@@ -163,7 +151,26 @@ struct usb_ep *usb_ep_autoconfig(
 	struct usb_endpoint_descriptor	*desc
 )
 {
-	return usb_ep_autoconfig_ss(gadget, desc, NULL);
+	struct usb_ep	*ep;
+	u8		type;
+
+	ep = usb_ep_autoconfig_ss(gadget, desc, NULL);
+	if (!ep)
+		return NULL;
+
+	type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
+
+	/* report (variable) full speed bulk maxpacket */
+	if (type == USB_ENDPOINT_XFER_BULK) {
+		int size = ep->maxpacket_limit;
+
+		/* min() doesn't work on bitfields with gcc-3.5 */
+		if (size > 64)
+			size = 64;
+		desc->wMaxPacketSize = cpu_to_le16(size);
+	}
+
+	return ep;
 }
 EXPORT_SYMBOL_GPL(usb_ep_autoconfig);
 
diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index 1e5430438703..20413c276c61 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -1082,6 +1082,7 @@ static ssize_t ffs_epfile_io(struct file *file, struct ffs_io_data *io_data)
 			 * condition with req->complete callback.
 			 */
 			usb_ep_dequeue(ep->ep, req);
+			wait_for_completion(&done);
 			interrupted = ep->status < 0;
 		}
 
@@ -2843,12 +2844,18 @@ static int __ffs_func_bind_do_descs(enum ffs_entity_type type, u8 *valuep,
 		struct usb_request *req;
 		struct usb_ep *ep;
 		u8 bEndpointAddress;
+		u16 wMaxPacketSize;
 
 		/*
 		 * We back up bEndpointAddress because autoconfig overwrites
 		 * it with physical endpoint address.
 		 */
 		bEndpointAddress = ds->bEndpointAddress;
+		/*
+		 * We back up wMaxPacketSize because autoconfig treats
+		 * endpoint descriptors as if they were full speed.
+		 */
+		wMaxPacketSize = ds->wMaxPacketSize;
 		pr_vdebug("autoconfig\n");
 		ep = usb_ep_autoconfig(func->gadget, ds);
 		if (unlikely(!ep))
@@ -2869,6 +2876,11 @@ static int __ffs_func_bind_do_descs(enum ffs_entity_type type, u8 *valuep,
 		 */
 		if (func->ffs->user_flags & FUNCTIONFS_VIRTUAL_ADDR)
 			ds->bEndpointAddress = bEndpointAddress;
+		/*
+		 * Restore wMaxPacketSize which was potentially
+		 * overwritten by autoconfig.
+		 */
+		ds->wMaxPacketSize = wMaxPacketSize;
 	}
 	ffs_dump_mem(": Rewritten ep desc", ds, ds->bLength);
 
diff --git a/drivers/usb/gadget/function/f_uac1.c b/drivers/usb/gadget/function/f_uac1.c
index 2746a926a8d9..00d346965f7a 100644
--- a/drivers/usb/gadget/function/f_uac1.c
+++ b/drivers/usb/gadget/function/f_uac1.c
@@ -459,10 +459,10 @@ static int f_audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 	} else if (intf == uac1->as_in_intf) {
 		uac1->as_in_alt = alt;
 
-			if (alt)
-				ret = u_audio_start_playback(&uac1->g_audio);
-			else
-				u_audio_stop_playback(&uac1->g_audio);
+		if (alt)
+			ret = u_audio_start_playback(&uac1->g_audio);
+		else
+			u_audio_stop_playback(&uac1->g_audio);
 	} else {
 		dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
 		return -EINVAL;
@@ -568,6 +568,7 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
 		goto fail;
 	as_out_interface_alt_0_desc.bInterfaceNumber = status;
 	as_out_interface_alt_1_desc.bInterfaceNumber = status;
+	ac_header_desc.baInterfaceNr[0] = status;
 	uac1->as_out_intf = status;
 	uac1->as_out_alt = 0;
 
@@ -576,6 +577,7 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
 		goto fail;
 	as_in_interface_alt_0_desc.bInterfaceNumber = status;
 	as_in_interface_alt_1_desc.bInterfaceNumber = status;
+	ac_header_desc.baInterfaceNr[1] = status;
 	uac1->as_in_intf = status;
 	uac1->as_in_alt = 0;
 
diff --git a/drivers/usb/gadget/function/u_ecm.h b/drivers/usb/gadget/function/u_ecm.h
index 050aa672ee7f..098ece573a5e 100644
--- a/drivers/usb/gadget/function/u_ecm.h
+++ b/drivers/usb/gadget/function/u_ecm.h
@@ -7,7 +7,7 @@
  * Copyright (c) 2013 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  */
 
 #ifndef U_ECM_H
diff --git a/drivers/usb/gadget/function/u_eem.h b/drivers/usb/gadget/function/u_eem.h
index de3828d3e8f0..921386a375cf 100644
--- a/drivers/usb/gadget/function/u_eem.h
+++ b/drivers/usb/gadget/function/u_eem.h
@@ -7,7 +7,7 @@
  * Copyright (c) 2013 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  */
 
 #ifndef U_EEM_H
diff --git a/drivers/usb/gadget/function/u_ether_configfs.h b/drivers/usb/gadget/function/u_ether_configfs.h
index cd33cee4d78b..d8b92485b727 100644
--- a/drivers/usb/gadget/function/u_ether_configfs.h
+++ b/drivers/usb/gadget/function/u_ether_configfs.h
@@ -7,7 +7,7 @@
  * Copyright (c) 2013 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  */
 
 #ifndef __U_ETHER_CONFIGFS_H
diff --git a/drivers/usb/gadget/function/u_fs.h b/drivers/usb/gadget/function/u_fs.h
index c3aba4dfa958..f9b0cf67360d 100644
--- a/drivers/usb/gadget/function/u_fs.h
+++ b/drivers/usb/gadget/function/u_fs.h
@@ -7,7 +7,7 @@
  * Copyright (c) 2013 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  */
 
 #ifndef U_FFS_H
diff --git a/drivers/usb/gadget/function/u_gether.h b/drivers/usb/gadget/function/u_gether.h
index 5b7e2eb90336..ce4f07626f96 100644
--- a/drivers/usb/gadget/function/u_gether.h
+++ b/drivers/usb/gadget/function/u_gether.h
@@ -7,7 +7,7 @@
  * Copyright (c) 2013 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  */
 
 #ifndef U_GETHER_H
diff --git a/drivers/usb/gadget/function/u_hid.h b/drivers/usb/gadget/function/u_hid.h
index 2f5ca4bfa7ff..1594bfa312eb 100644
--- a/drivers/usb/gadget/function/u_hid.h
+++ b/drivers/usb/gadget/function/u_hid.h
@@ -7,7 +7,7 @@
  * Copyright (c) 2014 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  */
 
 #ifndef U_HID_H
diff --git a/drivers/usb/gadget/function/u_midi.h b/drivers/usb/gadget/function/u_midi.h
index 5599aa5fc977..29bf006c0a13 100644
--- a/drivers/usb/gadget/function/u_midi.h
+++ b/drivers/usb/gadget/function/u_midi.h
@@ -7,7 +7,7 @@
  * Copyright (c) 2014 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  */
 
 #ifndef U_MIDI_H
diff --git a/drivers/usb/gadget/function/u_ncm.h b/drivers/usb/gadget/function/u_ncm.h
index 67324f983343..d483e45c0f77 100644
--- a/drivers/usb/gadget/function/u_ncm.h
+++ b/drivers/usb/gadget/function/u_ncm.h
@@ -7,7 +7,7 @@
  * Copyright (c) 2013 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  */
 
 #ifndef U_NCM_H
diff --git a/drivers/usb/gadget/function/u_printer.h b/drivers/usb/gadget/function/u_printer.h
index 6088ff744194..78797764f478 100644
--- a/drivers/usb/gadget/function/u_printer.h
+++ b/drivers/usb/gadget/function/u_printer.h
@@ -7,7 +7,7 @@
  * Copyright (c) 2015 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  */
 
 #ifndef U_PRINTER_H
diff --git a/drivers/usb/gadget/function/u_rndis.h b/drivers/usb/gadget/function/u_rndis.h
index d65fb4ebac3c..1e148b76f339 100644
--- a/drivers/usb/gadget/function/u_rndis.h
+++ b/drivers/usb/gadget/function/u_rndis.h
@@ -7,7 +7,7 @@
  * Copyright (c) 2013 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  */
 
 #ifndef U_RNDIS_H
diff --git a/drivers/usb/gadget/function/u_serial.c b/drivers/usb/gadget/function/u_serial.c
index 29436f75bbe0..65f634ec7fc2 100644
--- a/drivers/usb/gadget/function/u_serial.c
+++ b/drivers/usb/gadget/function/u_serial.c
@@ -16,7 +16,6 @@
 
 #include <linux/kernel.h>
 #include <linux/sched.h>
-#include <linux/interrupt.h>
 #include <linux/device.h>
 #include <linux/delay.h>
 #include <linux/tty.h>
@@ -26,6 +25,7 @@
 #include <linux/module.h>
 #include <linux/console.h>
 #include <linux/kthread.h>
+#include <linux/workqueue.h>
 #include <linux/kfifo.h>
 
 #include "u_serial.h"
@@ -110,7 +110,7 @@ struct gs_port {
 	int read_allocated;
 	struct list_head	read_queue;
 	unsigned		n_read;
-	struct tasklet_struct	push;
+	struct delayed_work	push;
 
 	struct list_head	write_pool;
 	int write_started;
@@ -352,9 +352,10 @@ __acquires(&port->port_lock)
  * So QUEUE_SIZE packets plus however many the FIFO holds (usually two)
  * can be buffered before the TTY layer's buffers (currently 64 KB).
  */
-static void gs_rx_push(unsigned long _port)
+static void gs_rx_push(struct work_struct *work)
 {
-	struct gs_port		*port = (void *)_port;
+	struct delayed_work	*w = to_delayed_work(work);
+	struct gs_port		*port = container_of(w, struct gs_port, push);
 	struct tty_struct	*tty;
 	struct list_head	*queue = &port->read_queue;
 	bool			disconnect = false;
@@ -429,21 +430,13 @@ static void gs_rx_push(unsigned long _port)
 
 	/* We want our data queue to become empty ASAP, keeping data
 	 * in the tty and ldisc (not here).  If we couldn't push any
-	 * this time around, there may be trouble unless there's an
-	 * implicit tty_unthrottle() call on its way...
+	 * this time around, RX may be starved, so wait until next jiffy.
 	 *
-	 * REVISIT we should probably add a timer to keep the tasklet
-	 * from starving ... but it's not clear that case ever happens.
+	 * We may leave non-empty queue only when there is a tty, and
+	 * either it is throttled or there is no more room in flip buffer.
 	 */
-	if (!list_empty(queue) && tty) {
-		if (!tty_throttled(tty)) {
-			if (do_push)
-				tasklet_schedule(&port->push);
-			else
-				pr_warn("ttyGS%d: RX not scheduled?\n",
-					port->port_num);
-		}
-	}
+	if (!list_empty(queue) && !tty_throttled(tty))
+		schedule_delayed_work(&port->push, 1);
 
 	/* If we're still connected, refill the USB RX queue. */
 	if (!disconnect && port->port_usb)
@@ -459,7 +452,7 @@ static void gs_read_complete(struct usb_ep *ep, struct usb_request *req)
 	/* Queue all received data until the tty layer is ready for it. */
 	spin_lock(&port->port_lock);
 	list_add_tail(&req->list, &port->read_queue);
-	tasklet_schedule(&port->push);
+	schedule_delayed_work(&port->push, 0);
 	spin_unlock(&port->port_lock);
 }
 
@@ -854,8 +847,8 @@ static void gs_unthrottle(struct tty_struct *tty)
 		 * rts/cts, or other handshaking with the host, but if the
 		 * read queue backs up enough we'll be NAKing OUT packets.
 		 */
-		tasklet_schedule(&port->push);
 		pr_vdebug("ttyGS%d: unthrottle\n", port->port_num);
+		schedule_delayed_work(&port->push, 0);
 	}
 	spin_unlock_irqrestore(&port->port_lock, flags);
 }
@@ -1159,7 +1152,7 @@ gs_port_alloc(unsigned port_num, struct usb_cdc_line_coding *coding)
 	init_waitqueue_head(&port->drain_wait);
 	init_waitqueue_head(&port->close_wait);
 
-	tasklet_init(&port->push, gs_rx_push, (unsigned long) port);
+	INIT_DELAYED_WORK(&port->push, gs_rx_push);
 
 	INIT_LIST_HEAD(&port->read_pool);
 	INIT_LIST_HEAD(&port->read_queue);
@@ -1186,7 +1179,7 @@ static int gs_closed(struct gs_port *port)
 
 static void gserial_free_port(struct gs_port *port)
 {
-	tasklet_kill(&port->push);
+	cancel_delayed_work_sync(&port->push);
 	/* wait for old opens to finish */
 	wait_event(port->close_wait, gs_closed(port));
 	WARN_ON(port->port_usb != NULL);
diff --git a/drivers/usb/gadget/function/u_uac2.h b/drivers/usb/gadget/function/u_uac2.h
index 8362ee572e1e..82048791eb6e 100644
--- a/drivers/usb/gadget/function/u_uac2.h
+++ b/drivers/usb/gadget/function/u_uac2.h
@@ -7,7 +7,7 @@
  * Copyright (c) 2014 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  */
 
 #ifndef U_UAC2_H
diff --git a/drivers/usb/gadget/function/u_uvc.h b/drivers/usb/gadget/function/u_uvc.h
index 5242d489e20a..16da49a2fcf2 100644
--- a/drivers/usb/gadget/function/u_uvc.h
+++ b/drivers/usb/gadget/function/u_uvc.h
@@ -7,7 +7,7 @@
  * Copyright (c) 2013-2014 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  */
 
 #ifndef U_UVC_H
diff --git a/drivers/usb/gadget/function/uvc.h b/drivers/usb/gadget/function/uvc.h
index 099d650082e5..1473d25ff17a 100644
--- a/drivers/usb/gadget/function/uvc.h
+++ b/drivers/usb/gadget/function/uvc.h
@@ -56,6 +56,8 @@ extern unsigned int uvc_gadget_trace_param;
 	dev_dbg(&(f)->config->cdev->gadget->dev, "%s: " fmt, (f)->name, ##args)
 #define uvcg_info(f, fmt, args...) \
 	dev_info(&(f)->config->cdev->gadget->dev, "%s: " fmt, (f)->name, ##args)
+#define uvcg_warn(f, fmt, args...) \
+	dev_warn(&(f)->config->cdev->gadget->dev, "%s: " fmt, (f)->name, ##args)
 #define uvcg_err(f, fmt, args...) \
 	dev_err(&(f)->config->cdev->gadget->dev, "%s: " fmt, (f)->name, ##args)
 
diff --git a/drivers/usb/gadget/function/uvc_configfs.c b/drivers/usb/gadget/function/uvc_configfs.c
index bc1e2af566c3..00fb58e50a15 100644
--- a/drivers/usb/gadget/function/uvc_configfs.c
+++ b/drivers/usb/gadget/function/uvc_configfs.c
@@ -7,7 +7,7 @@
  * Copyright (c) 2014 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  */
 
 #include <linux/sort.h>
@@ -1570,10 +1570,6 @@ uvcg_uncompressed_##cname##_store(struct config_item *item,		\
 	if (ret)							\
 		goto end;						\
 									\
-	if (num > 255) {						\
-		ret = -EINVAL;						\
-		goto end;						\
-	}								\
 	u->desc.aname = num;						\
 	ret = len;							\
 end:									\
@@ -1767,10 +1763,6 @@ uvcg_mjpeg_##cname##_store(struct config_item *item,			\
 	if (ret)							\
 		goto end;						\
 									\
-	if (num > 255) {						\
-		ret = -EINVAL;						\
-		goto end;						\
-	}								\
 	u->desc.aname = num;						\
 	ret = len;							\
 end:									\
diff --git a/drivers/usb/gadget/function/uvc_configfs.h b/drivers/usb/gadget/function/uvc_configfs.h
index 8549c0b27b9d..341391dbc81f 100644
--- a/drivers/usb/gadget/function/uvc_configfs.h
+++ b/drivers/usb/gadget/function/uvc_configfs.h
@@ -7,7 +7,7 @@
  * Copyright (c) 2014 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  */
 #ifndef UVC_CONFIGFS_H
 #define UVC_CONFIGFS_H
diff --git a/drivers/usb/gadget/function/uvc_v4l2.h b/drivers/usb/gadget/function/uvc_v4l2.h
index a75e9c397446..452d71059b3f 100644
--- a/drivers/usb/gadget/function/uvc_v4l2.h
+++ b/drivers/usb/gadget/function/uvc_v4l2.h
@@ -7,7 +7,7 @@
  *
  * Copyright (c) 2013 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
- *		Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ *		Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  */
 
 #ifndef __UVC_V4L2_H__
diff --git a/drivers/usb/gadget/function/uvc_video.h b/drivers/usb/gadget/function/uvc_video.h
index 278dc52c7604..dff12103f696 100644
--- a/drivers/usb/gadget/function/uvc_video.h
+++ b/drivers/usb/gadget/function/uvc_video.h
@@ -7,7 +7,7 @@
  *
  * Copyright (c) 2013 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
- *		Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ *		Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  */
 #ifndef __UVC_VIDEO_H__
 #define __UVC_VIDEO_H__
diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c
index 37ca0e669bd8..249277d0e53f 100644
--- a/drivers/usb/gadget/legacy/inode.c
+++ b/drivers/usb/gadget/legacy/inode.c
@@ -1218,27 +1218,27 @@ ep0_poll (struct file *fd, poll_table *wait)
 	if (dev->state <= STATE_DEV_OPENED)
 		return DEFAULT_POLLMASK;
 
-       poll_wait(fd, &dev->wait, wait);
-
-       spin_lock_irq (&dev->lock);
-
-       /* report fd mode change before acting on it */
-       if (dev->setup_abort) {
-               dev->setup_abort = 0;
-               mask = EPOLLHUP;
-               goto out;
-       }
-
-       if (dev->state == STATE_DEV_SETUP) {
-               if (dev->setup_in || dev->setup_can_stall)
-                       mask = EPOLLOUT;
-       } else {
-               if (dev->ev_next != 0)
-                       mask = EPOLLIN;
-       }
+	poll_wait(fd, &dev->wait, wait);
+
+	spin_lock_irq(&dev->lock);
+
+	/* report fd mode change before acting on it */
+	if (dev->setup_abort) {
+		dev->setup_abort = 0;
+		mask = EPOLLHUP;
+		goto out;
+	}
+
+	if (dev->state == STATE_DEV_SETUP) {
+		if (dev->setup_in || dev->setup_can_stall)
+			mask = EPOLLOUT;
+	} else {
+		if (dev->ev_next != 0)
+			mask = EPOLLIN;
+	}
 out:
-       spin_unlock_irq(&dev->lock);
-       return mask;
+	spin_unlock_irq(&dev->lock);
+	return mask;
 }
 
 static long dev_ioctl (struct file *fd, unsigned code, unsigned long value)
diff --git a/drivers/usb/gadget/u_f.c b/drivers/usb/gadget/u_f.c
index dbaa46eee853..6aea1ecb3999 100644
--- a/drivers/usb/gadget/u_f.c
+++ b/drivers/usb/gadget/u_f.c
@@ -5,7 +5,7 @@
  * Copyright (c) 2013 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  */
 
 #include "u_f.h"
diff --git a/drivers/usb/gadget/u_f.h b/drivers/usb/gadget/u_f.h
index 09f90447fed5..eaa13fd3dc7f 100644
--- a/drivers/usb/gadget/u_f.h
+++ b/drivers/usb/gadget/u_f.h
@@ -7,7 +7,7 @@
  * Copyright (c) 2013 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  */
 
 #ifndef __U_F_H__
diff --git a/drivers/usb/gadget/u_os_desc.h b/drivers/usb/gadget/u_os_desc.h
index 8acd21779ac8..5d7d35c8cc31 100644
--- a/drivers/usb/gadget/u_os_desc.h
+++ b/drivers/usb/gadget/u_os_desc.h
@@ -7,7 +7,7 @@
  * Copyright (c) 2014 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  */
 
 #ifndef __U_OS_DESC_H__
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/epn.c b/drivers/usb/gadget/udc/aspeed-vhub/epn.c
index 4a28e3fbeb0b..83340f4fdc6e 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/epn.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/epn.c
@@ -120,7 +120,7 @@ static void ast_vhub_epn_handle_ack(struct ast_vhub_ep *ep)
 	/* No current DMA ongoing */
 	req->active = false;
 
-	/* Grab lenght out of HW */
+	/* Grab length out of HW */
 	len = VHUB_EP_DMA_TX_SIZE(stat);
 
 	/* If not using DMA, copy data out if needed */
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/hub.c b/drivers/usb/gadget/udc/aspeed-vhub/hub.c
index 35ba0e55a2e9..7c040f56100e 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/hub.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/hub.c
@@ -295,7 +295,7 @@ static int ast_vhub_rep_desc(struct ast_vhub_ep *ep,
 		dsize = AST_VHUB_HUB_DESC_SIZE;
 		memcpy(ep->buf, &ast_vhub_hub_desc, dsize);
 		BUILD_BUG_ON(dsize > sizeof(ast_vhub_hub_desc));
-	BUILD_BUG_ON(AST_VHUB_HUB_DESC_SIZE >= AST_VHUB_EP0_MAX_PACKET);
+		BUILD_BUG_ON(AST_VHUB_HUB_DESC_SIZE >= AST_VHUB_EP0_MAX_PACKET);
 		break;
 	default:
 		return std_req_stall;
diff --git a/drivers/usb/gadget/udc/bdc/bdc_cmd.c b/drivers/usb/gadget/udc/bdc/bdc_cmd.c
index 6305bf2c8b59..44c2a5eef785 100644
--- a/drivers/usb/gadget/udc/bdc/bdc_cmd.c
+++ b/drivers/usb/gadget/udc/bdc/bdc_cmd.c
@@ -311,8 +311,8 @@ int bdc_ep_clear_stall(struct bdc *bdc, int epnum)
 		/* if the endpoint it not stallled */
 		if (!(ep->flags & BDC_EP_STALL)) {
 			ret = bdc_ep_set_stall(bdc, epnum);
-				if (ret)
-					return ret;
+			if (ret)
+				return ret;
 		}
 	}
 	/* Preserve the seq number for ep0 only */
diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
index 87d6b12779f2..7cf34beb50df 100644
--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -281,10 +281,10 @@ EXPORT_SYMBOL_GPL(usb_ep_queue);
  * @ep:the endpoint associated with the request
  * @req:the request being canceled
  *
- * If the request is still active on the endpoint, it is dequeued and its
- * completion routine is called (with status -ECONNRESET); else a negative
- * error code is returned. This is guaranteed to happen before the call to
- * usb_ep_dequeue() returns.
+ * If the request is still active on the endpoint, it is dequeued and
+ * eventually its completion routine is called (with status -ECONNRESET);
+ * else a negative error code is returned.  This routine is asynchronous,
+ * that is, it may return before the completion routine runs.
  *
  * Note that some hardware can't clear out write fifos (to unlink the request
  * at the head of the queue) except as part of disconnecting from usb. Such
diff --git a/drivers/usb/gadget/udc/fotg210-udc.c b/drivers/usb/gadget/udc/fotg210-udc.c
index bc6abaea907d..cec49294bac6 100644
--- a/drivers/usb/gadget/udc/fotg210-udc.c
+++ b/drivers/usb/gadget/udc/fotg210-udc.c
@@ -326,6 +326,7 @@ dma_reset:
 static void fotg210_start_dma(struct fotg210_ep *ep,
 			struct fotg210_request *req)
 {
+	struct device *dev = &ep->fotg210->gadget.dev;
 	dma_addr_t d;
 	u8 *buffer;
 	u32 length;
@@ -348,18 +349,14 @@ static void fotg210_start_dma(struct fotg210_ep *ep,
 			length = req->req.length;
 	}
 
-	d = dma_map_single(NULL, buffer, length,
+	d = dma_map_single(dev, buffer, length,
 			ep->dir_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
 
-	if (dma_mapping_error(NULL, d)) {
+	if (dma_mapping_error(dev, d)) {
 		pr_err("dma_mapping_error\n");
 		return;
 	}
 
-	dma_sync_single_for_device(NULL, d, length,
-				   ep->dir_in ? DMA_TO_DEVICE :
-					DMA_FROM_DEVICE);
-
 	fotg210_enable_dma(ep, d, length);
 
 	/* check if dma is done */
@@ -370,7 +367,7 @@ static void fotg210_start_dma(struct fotg210_ep *ep,
 	/* update actual transfer length */
 	req->req.actual += length;
 
-	dma_unmap_single(NULL, d, length, DMA_TO_DEVICE);
+	dma_unmap_single(dev, d, length, DMA_TO_DEVICE);
 }
 
 static void fotg210_ep0_queue(struct fotg210_ep *ep,
diff --git a/drivers/usb/gadget/udc/net2280.c b/drivers/usb/gadget/udc/net2280.c
index e7dae5379e04..f63f82450bf4 100644
--- a/drivers/usb/gadget/udc/net2280.c
+++ b/drivers/usb/gadget/udc/net2280.c
@@ -516,8 +516,8 @@ static int net2280_disable(struct usb_ep *_ep)
 	unsigned long		flags;
 
 	ep = container_of(_ep, struct net2280_ep, ep);
-	if (!_ep || !ep->desc || _ep->name == ep0name) {
-		pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep);
+	if (!_ep || _ep->name == ep0name) {
+		pr_err("%s: Invalid ep=%p\n", __func__, _ep);
 		return -EINVAL;
 	}
 	spin_lock_irqsave(&ep->dev->lock, flags);
@@ -2279,7 +2279,7 @@ static void usb_reinit_338x(struct net2280 *dev)
 	 * - It is safe to set for all connection speeds; all chip revisions.
 	 * - R-M-W to leave other bits undisturbed.
 	 * - Reference PLX TT-7372
-	*/
+	 */
 	val = readl(&dev->ll_chicken_reg->ll_tsn_chicken_bit);
 	val |= BIT(RECOVERY_IDLE_TO_RECOVER_FMW);
 	writel(val, &dev->ll_chicken_reg->ll_tsn_chicken_bit);
diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c
index 6e34f9594159..7dc248546fd4 100644
--- a/drivers/usb/gadget/udc/renesas_usb3.c
+++ b/drivers/usb/gadget/udc/renesas_usb3.c
@@ -2630,6 +2630,10 @@ MODULE_DEVICE_TABLE(of, usb3_of_match);
 
 static const struct soc_device_attribute renesas_usb3_quirks_match[] = {
 	{
+		.soc_id = "r8a774c0",
+		.data = &renesas_usb3_priv_r8a77990,
+	},
+	{
 		.soc_id = "r8a7795", .revision = "ES1.*",
 		.data = &renesas_usb3_priv_r8a7795_es1,
 	},