9 files changed, 289 insertions, 217 deletions

diff --git a/drivers/usb/core/Kconfig b/drivers/usb/core/Kconfig
index bdb6bd0b63a6..ecaacc8ed311 100644
--- a/drivers/usb/core/Kconfig
+++ b/drivers/usb/core/Kconfig
@@ -45,7 +45,6 @@ config USB_DYNAMIC_MINORS
 config USB_OTG
 	bool "OTG support"
 	depends on PM
-	default n
 	help
 	  The most notable feature of USB OTG is support for a
 	  "Dual-Role" device, which can act as either a device
diff --git a/drivers/usb/core/buffer.c b/drivers/usb/core/buffer.c
index f641342cdec0..1359b78a624e 100644
--- a/drivers/usb/core/buffer.c
+++ b/drivers/usb/core/buffer.c
@@ -16,6 +16,7 @@
 #include <linux/io.h>
 #include <linux/dma-mapping.h>
 #include <linux/dmapool.h>
+#include <linux/genalloc.h>
 #include <linux/usb.h>
 #include <linux/usb/hcd.h>
 
@@ -67,7 +68,7 @@ int hcd_buffer_create(struct usb_hcd *hcd)
 
 	if (!IS_ENABLED(CONFIG_HAS_DMA) ||
 	    (!is_device_dma_capable(hcd->self.sysdev) &&
-	     !(hcd->driver->flags & HCD_LOCAL_MEM)))
+	     !hcd->localmem_pool))
 		return 0;
 
 	for (i = 0; i < HCD_BUFFER_POOLS; i++) {
@@ -124,10 +125,12 @@ void *hcd_buffer_alloc(
 	if (size == 0)
 		return NULL;
 
+	if (hcd->localmem_pool)
+		return gen_pool_dma_alloc(hcd->localmem_pool, size, dma);
+
 	/* some USB hosts just use PIO */
 	if (!IS_ENABLED(CONFIG_HAS_DMA) ||
-	    (!is_device_dma_capable(bus->sysdev) &&
-	     !(hcd->driver->flags & HCD_LOCAL_MEM))) {
+	    !is_device_dma_capable(bus->sysdev)) {
 		*dma = ~(dma_addr_t) 0;
 		return kmalloc(size, mem_flags);
 	}
@@ -152,9 +155,13 @@ void hcd_buffer_free(
 	if (!addr)
 		return;
 
+	if (hcd->localmem_pool) {
+		gen_pool_free(hcd->localmem_pool, (unsigned long)addr, size);
+		return;
+	}
+
 	if (!IS_ENABLED(CONFIG_HAS_DMA) ||
-	    (!is_device_dma_capable(bus->sysdev) &&
-	     !(hcd->driver->flags & HCD_LOCAL_MEM))) {
+	    !is_device_dma_capable(bus->sysdev)) {
 		kfree(addr);
 		return;
 	}
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index fa783531ee88..9063ede411ae 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -48,9 +48,6 @@
 #define USB_DEVICE_MAX			(USB_MAXBUS * 128)
 #define USB_SG_SIZE			16384 /* split-size for large txs */
 
-/* Mutual exclusion for removal, open, and release */
-DEFINE_MUTEX(usbfs_mutex);
-
 struct usb_dev_state {
 	struct list_head list;      /* state list */
 	struct usb_device *dev;
@@ -63,7 +60,7 @@ struct usb_dev_state {
 	unsigned int discsignr;
 	struct pid *disc_pid;
 	const struct cred *cred;
-	void __user *disccontext;
+	sigval_t disccontext;
 	unsigned long ifclaimed;
 	u32 disabled_bulk_eps;
 	bool privileges_dropped;
@@ -90,6 +87,7 @@ struct async {
 	unsigned int ifnum;
 	void __user *userbuffer;
 	void __user *userurb;
+	sigval_t userurb_sigval;
 	struct urb *urb;
 	struct usb_memory *usbm;
 	unsigned int mem_usage;
@@ -582,22 +580,19 @@ static void async_completed(struct urb *urb)
 {
 	struct async *as = urb->context;
 	struct usb_dev_state *ps = as->ps;
-	struct kernel_siginfo sinfo;
 	struct pid *pid = NULL;
 	const struct cred *cred = NULL;
 	unsigned long flags;
-	int signr;
+	sigval_t addr;
+	int signr, errno;
 
 	spin_lock_irqsave(&ps->lock, flags);
 	list_move_tail(&as->asynclist, &ps->async_completed);
 	as->status = urb->status;
 	signr = as->signr;
 	if (signr) {
-		clear_siginfo(&sinfo);
-		sinfo.si_signo = as->signr;
-		sinfo.si_errno = as->status;
-		sinfo.si_code = SI_ASYNCIO;
-		sinfo.si_addr = as->userurb;
+		errno = as->status;
+		addr = as->userurb_sigval;
 		pid = get_pid(as->pid);
 		cred = get_cred(as->cred);
 	}
@@ -615,7 +610,7 @@ static void async_completed(struct urb *urb)
 	spin_unlock_irqrestore(&ps->lock, flags);
 
 	if (signr) {
-		kill_pid_info_as_cred(sinfo.si_signo, &sinfo, pid, cred);
+		kill_pid_usb_asyncio(signr, errno, addr, pid, cred);
 		put_pid(pid);
 		put_cred(cred);
 	}
@@ -947,9 +942,9 @@ error:
 	return ret;
 }
 
-static int match_devt(struct device *dev, void *data)
+static int match_devt(struct device *dev, const void *data)
 {
-	return dev->devt == (dev_t) (unsigned long) data;
+	return dev->devt == (dev_t)(unsigned long)(void *)data;
 }
 
 static struct usb_device *usbdev_lookup_by_devt(dev_t devt)
@@ -979,15 +974,9 @@ static int usbdev_open(struct inode *inode, struct file *file)
 
 	ret = -ENODEV;
 
-	/* Protect against simultaneous removal or release */
-	mutex_lock(&usbfs_mutex);
-
 	/* usbdev device-node */
 	if (imajor(inode) == USB_DEVICE_MAJOR)
 		dev = usbdev_lookup_by_devt(inode->i_rdev);
-
-	mutex_unlock(&usbfs_mutex);
-
 	if (!dev)
 		goto out_free_ps;
 
@@ -1308,6 +1297,39 @@ static int proc_connectinfo(struct usb_dev_state *ps, void __user *arg)
 	return 0;
 }
 
+static int proc_conninfo_ex(struct usb_dev_state *ps,
+			    void __user *arg, size_t size)
+{
+	struct usbdevfs_conninfo_ex ci;
+	struct usb_device *udev = ps->dev;
+
+	if (size < sizeof(ci.size))
+		return -EINVAL;
+
+	memset(&ci, 0, sizeof(ci));
+	ci.size = sizeof(ci);
+	ci.busnum = udev->bus->busnum;
+	ci.devnum = udev->devnum;
+	ci.speed = udev->speed;
+
+	while (udev && udev->portnum != 0) {
+		if (++ci.num_ports <= ARRAY_SIZE(ci.ports))
+			ci.ports[ARRAY_SIZE(ci.ports) - ci.num_ports] =
+					udev->portnum;
+		udev = udev->parent;
+	}
+
+	if (ci.num_ports < ARRAY_SIZE(ci.ports))
+		memmove(&ci.ports[0],
+			&ci.ports[ARRAY_SIZE(ci.ports) - ci.num_ports],
+			ci.num_ports);
+
+	if (copy_to_user(arg, &ci, min(sizeof(ci), size)))
+		return -EFAULT;
+
+	return 0;
+}
+
 static int proc_resetdevice(struct usb_dev_state *ps)
 {
 	struct usb_host_config *actconfig = ps->dev->actconfig;
@@ -1427,7 +1449,7 @@ find_memory_area(struct usb_dev_state *ps, const struct usbdevfs_urb *uurb)
 
 static int proc_do_submiturb(struct usb_dev_state *ps, struct usbdevfs_urb *uurb,
 			struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
-			void __user *arg)
+			void __user *arg, sigval_t userurb_sigval)
 {
 	struct usbdevfs_iso_packet_desc *isopkt = NULL;
 	struct usb_host_endpoint *ep;
@@ -1486,15 +1508,15 @@ static int proc_do_submiturb(struct usb_dev_state *ps, struct usbdevfs_urb *uurb
 			ret = -EFAULT;
 			goto error;
 		}
-		if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
+		if (uurb->buffer_length < (le16_to_cpu(dr->wLength) + 8)) {
 			ret = -EINVAL;
 			goto error;
 		}
 		ret = check_ctrlrecip(ps, dr->bRequestType, dr->bRequest,
-				      le16_to_cpup(&dr->wIndex));
+				      le16_to_cpu(dr->wIndex));
 		if (ret)
 			goto error;
-		uurb->buffer_length = le16_to_cpup(&dr->wLength);
+		uurb->buffer_length = le16_to_cpu(dr->wLength);
 		uurb->buffer += 8;
 		if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) {
 			is_in = 1;
@@ -1509,9 +1531,9 @@ static int proc_do_submiturb(struct usb_dev_state *ps, struct usbdevfs_urb *uurb
 			"bRequest=%02x wValue=%04x "
 			"wIndex=%04x wLength=%04x\n",
 			dr->bRequestType, dr->bRequest,
-			__le16_to_cpup(&dr->wValue),
-			__le16_to_cpup(&dr->wIndex),
-			__le16_to_cpup(&dr->wLength));
+			__le16_to_cpu(dr->wValue),
+			__le16_to_cpu(dr->wIndex),
+			__le16_to_cpu(dr->wLength));
 		u = sizeof(struct usb_ctrlrequest);
 		break;
 
@@ -1727,6 +1749,7 @@ static int proc_do_submiturb(struct usb_dev_state *ps, struct usbdevfs_urb *uurb
 	isopkt = NULL;
 	as->ps = ps;
 	as->userurb = arg;
+	as->userurb_sigval = userurb_sigval;
 	if (as->usbm) {
 		unsigned long uurb_start = (unsigned long)uurb->buffer;
 
@@ -1789,8 +1812,6 @@ static int proc_do_submiturb(struct usb_dev_state *ps, struct usbdevfs_urb *uurb
 	return 0;
 
  error:
-	if (as && as->usbm)
-		dec_usb_memory_use_count(as->usbm, &as->usbm->urb_use_count);
 	kfree(isopkt);
 	kfree(dr);
 	if (as)
@@ -1801,13 +1822,17 @@ static int proc_do_submiturb(struct usb_dev_state *ps, struct usbdevfs_urb *uurb
 static int proc_submiturb(struct usb_dev_state *ps, void __user *arg)
 {
 	struct usbdevfs_urb uurb;
+	sigval_t userurb_sigval;
 
 	if (copy_from_user(&uurb, arg, sizeof(uurb)))
 		return -EFAULT;
 
+	memset(&userurb_sigval, 0, sizeof(userurb_sigval));
+	userurb_sigval.sival_ptr = arg;
+
 	return proc_do_submiturb(ps, &uurb,
 			(((struct usbdevfs_urb __user *)arg)->iso_frame_desc),
-			arg);
+			arg, userurb_sigval);
 }
 
 static int proc_unlinkurb(struct usb_dev_state *ps, void __user *arg)
@@ -1977,7 +2002,7 @@ static int proc_disconnectsignal_compat(struct usb_dev_state *ps, void __user *a
 	if (copy_from_user(&ds, arg, sizeof(ds)))
 		return -EFAULT;
 	ps->discsignr = ds.signr;
-	ps->disccontext = compat_ptr(ds.context);
+	ps->disccontext.sival_int = ds.context;
 	return 0;
 }
 
@@ -2005,13 +2030,17 @@ static int get_urb32(struct usbdevfs_urb *kurb,
 static int proc_submiturb_compat(struct usb_dev_state *ps, void __user *arg)
 {
 	struct usbdevfs_urb uurb;
+	sigval_t userurb_sigval;
 
 	if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg))
 		return -EFAULT;
 
+	memset(&userurb_sigval, 0, sizeof(userurb_sigval));
+	userurb_sigval.sival_int = ptr_to_compat(arg);
+
 	return proc_do_submiturb(ps, &uurb,
 			((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc,
-			arg);
+			arg, userurb_sigval);
 }
 
 static int processcompl_compat(struct async *as, void __user * __user *arg)
@@ -2092,7 +2121,7 @@ static int proc_disconnectsignal(struct usb_dev_state *ps, void __user *arg)
 	if (copy_from_user(&ds, arg, sizeof(ds)))
 		return -EFAULT;
 	ps->discsignr = ds.signr;
-	ps->disccontext = ds.context;
+	ps->disccontext.sival_ptr = ds.context;
 	return 0;
 }
 
@@ -2130,6 +2159,9 @@ static int proc_ioctl(struct usb_dev_state *ps, struct usbdevfs_ioctl *ctl)
 	if (ps->privileges_dropped)
 		return -EACCES;
 
+	if (!connected(ps))
+		return -ENODEV;
+
 	/* alloc buffer */
 	size = _IOC_SIZE(ctl->ioctl_code);
 	if (size > 0) {
@@ -2146,11 +2178,6 @@ static int proc_ioctl(struct usb_dev_state *ps, struct usbdevfs_ioctl *ctl)
 		}
 	}
 
-	if (!connected(ps)) {
-		kfree(buf);
-		return -ENODEV;
-	}
-
 	if (ps->dev->state != USB_STATE_CONFIGURED)
 		retval = -EHOSTUNREACH;
 	else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno)))
@@ -2252,7 +2279,7 @@ static int proc_get_capabilities(struct usb_dev_state *ps, void __user *arg)
 
 	caps = USBDEVFS_CAP_ZERO_PACKET | USBDEVFS_CAP_NO_PACKET_SIZE_LIM |
 			USBDEVFS_CAP_REAP_AFTER_DISCONNECT | USBDEVFS_CAP_MMAP |
-			USBDEVFS_CAP_DROP_PRIVILEGES;
+			USBDEVFS_CAP_DROP_PRIVILEGES | USBDEVFS_CAP_CONNINFO_EX;
 	if (!ps->dev->bus->no_stop_on_short)
 		caps |= USBDEVFS_CAP_BULK_CONTINUATION;
 	if (ps->dev->bus->sg_tablesize)
@@ -2551,6 +2578,13 @@ static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
 		break;
 	}
 
+	/* Handle variable-length commands */
+	switch (cmd & ~IOCSIZE_MASK) {
+	case USBDEVFS_CONNINFO_EX(0):
+		ret = proc_conninfo_ex(ps, p, _IOC_SIZE(cmd));
+		break;
+	}
+
  done:
 	usb_unlock_device(dev);
 	if (ret >= 0)
@@ -2614,22 +2648,15 @@ const struct file_operations usbdev_file_operations = {
 static void usbdev_remove(struct usb_device *udev)
 {
 	struct usb_dev_state *ps;
-	struct kernel_siginfo sinfo;
 
 	while (!list_empty(&udev->filelist)) {
 		ps = list_entry(udev->filelist.next, struct usb_dev_state, list);
 		destroy_all_async(ps);
 		wake_up_all(&ps->wait);
 		list_del_init(&ps->list);
-		if (ps->discsignr) {
-			clear_siginfo(&sinfo);
-			sinfo.si_signo = ps->discsignr;
-			sinfo.si_errno = EPIPE;
-			sinfo.si_code = SI_ASYNCIO;
-			sinfo.si_addr = ps->disccontext;
-			kill_pid_info_as_cred(ps->discsignr, &sinfo,
-					ps->disc_pid, ps->cred);
-		}
+		if (ps->discsignr)
+			kill_pid_usb_asyncio(ps->discsignr, EPIPE, ps->disccontext,
+					     ps->disc_pid, ps->cred);
 	}
 }
 
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 94d22551fc1b..2ccbc2f83570 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -29,6 +29,8 @@
 #include <linux/workqueue.h>
 #include <linux/pm_runtime.h>
 #include <linux/types.h>
+#include <linux/genalloc.h>
+#include <linux/io.h>
 
 #include <linux/phy/phy.h>
 #include <linux/usb.h>
@@ -101,11 +103,6 @@ static DEFINE_SPINLOCK(hcd_urb_unlink_lock);
 /* wait queue for synchronous unlinks */
 DECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue);
 
-static inline int is_root_hub(struct usb_device *udev)
-{
-	return (udev->parent == NULL);
-}
-
 /*-------------------------------------------------------------------------*/
 
 /*
@@ -878,101 +875,6 @@ static int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 }
 
 
-
-/*
- * Show & store the current value of authorized_default
- */
-static ssize_t authorized_default_show(struct device *dev,
-				       struct device_attribute *attr, char *buf)
-{
-	struct usb_device *rh_usb_dev = to_usb_device(dev);
-	struct usb_bus *usb_bus = rh_usb_dev->bus;
-	struct usb_hcd *hcd;
-
-	hcd = bus_to_hcd(usb_bus);
-	return snprintf(buf, PAGE_SIZE, "%u\n", hcd->dev_policy);
-}
-
-static ssize_t authorized_default_store(struct device *dev,
-					struct device_attribute *attr,
-					const char *buf, size_t size)
-{
-	ssize_t result;
-	unsigned val;
-	struct usb_device *rh_usb_dev = to_usb_device(dev);
-	struct usb_bus *usb_bus = rh_usb_dev->bus;
-	struct usb_hcd *hcd;
-
-	hcd = bus_to_hcd(usb_bus);
-	result = sscanf(buf, "%u\n", &val);
-	if (result == 1) {
-		hcd->dev_policy = val <= USB_DEVICE_AUTHORIZE_INTERNAL ?
-			val : USB_DEVICE_AUTHORIZE_ALL;
-		result = size;
-	} else {
-		result = -EINVAL;
-	}
-	return result;
-}
-static DEVICE_ATTR_RW(authorized_default);
-
-/*
- * interface_authorized_default_show - show default authorization status
- * for USB interfaces
- *
- * note: interface_authorized_default is the default value
- *       for initializing the authorized attribute of interfaces
- */
-static ssize_t interface_authorized_default_show(struct device *dev,
-		struct device_attribute *attr, char *buf)
-{
-	struct usb_device *usb_dev = to_usb_device(dev);
-	struct usb_hcd *hcd = bus_to_hcd(usb_dev->bus);
-
-	return sprintf(buf, "%u\n", !!HCD_INTF_AUTHORIZED(hcd));
-}
-
-/*
- * interface_authorized_default_store - store default authorization status
- * for USB interfaces
- *
- * note: interface_authorized_default is the default value
- *       for initializing the authorized attribute of interfaces
- */
-static ssize_t interface_authorized_default_store(struct device *dev,
-		struct device_attribute *attr, const char *buf, size_t count)
-{
-	struct usb_device *usb_dev = to_usb_device(dev);
-	struct usb_hcd *hcd = bus_to_hcd(usb_dev->bus);
-	int rc = count;
-	bool val;
-
-	if (strtobool(buf, &val) != 0)
-		return -EINVAL;
-
-	if (val)
-		set_bit(HCD_FLAG_INTF_AUTHORIZED, &hcd->flags);
-	else
-		clear_bit(HCD_FLAG_INTF_AUTHORIZED, &hcd->flags);
-
-	return rc;
-}
-static DEVICE_ATTR_RW(interface_authorized_default);
-
-/* Group all the USB bus attributes */
-static struct attribute *usb_bus_attrs[] = {
-		&dev_attr_authorized_default.attr,
-		&dev_attr_interface_authorized_default.attr,
-		NULL,
-};
-
-static const struct attribute_group usb_bus_attr_group = {
-	.name = NULL,	/* we want them in the same directory */
-	.attrs = usb_bus_attrs,
-};
-
-
-
 /*-------------------------------------------------------------------------*/
 
 /**
@@ -1345,14 +1247,14 @@ EXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep);
  * using regular system memory - like pci devices doing bus mastering.
  *
  * To support host controllers with limited dma capabilities we provide dma
- * bounce buffers. This feature can be enabled using the HCD_LOCAL_MEM flag.
+ * bounce buffers. This feature can be enabled by initializing
+ * hcd->localmem_pool using usb_hcd_setup_local_mem().
  * For this to work properly the host controller code must first use the
  * function dma_declare_coherent_memory() to point out which memory area
  * that should be used for dma allocations.
  *
- * The HCD_LOCAL_MEM flag then tells the usb code to allocate all data for
- * dma using dma_alloc_coherent() which in turn allocates from the memory
- * area pointed out with dma_declare_coherent_memory().
+ * The initialized hcd->localmem_pool then tells the usb code to allocate all
+ * data for dma using the genalloc API.
  *
  * So, to summarize...
  *
@@ -1362,9 +1264,6 @@ EXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep);
  *   (a) "normal" kernel memory is no good, and
  *   (b) there's not enough to share
  *
- * - The only *portable* hook for such stuff in the
- *   DMA framework is dma_declare_coherent_memory()
- *
  * - So we use that, even though the primary requirement
  *   is that the memory be "local" (hence addressable
  *   by that device), not "coherent".
@@ -1531,7 +1430,7 @@ int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
 						urb->setup_dma))
 				return -EAGAIN;
 			urb->transfer_flags |= URB_SETUP_MAP_SINGLE;
-		} else if (hcd->driver->flags & HCD_LOCAL_MEM) {
+		} else if (hcd->localmem_pool) {
 			ret = hcd_alloc_coherent(
 					urb->dev->bus, mem_flags,
 					&urb->setup_dma,
@@ -1601,7 +1500,7 @@ int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
 				else
 					urb->transfer_flags |= URB_DMA_MAP_SINGLE;
 			}
-		} else if (hcd->driver->flags & HCD_LOCAL_MEM) {
+		} else if (hcd->localmem_pool) {
 			ret = hcd_alloc_coherent(
 					urb->dev->bus, mem_flags,
 					&urb->transfer_dma,
@@ -2895,32 +2794,11 @@ int usb_add_hcd(struct usb_hcd *hcd,
 	if (retval != 0)
 		goto err_register_root_hub;
 
-	retval = sysfs_create_group(&rhdev->dev.kobj, &usb_bus_attr_group);
-	if (retval < 0) {
-		printk(KERN_ERR "Cannot register USB bus sysfs attributes: %d\n",
-		       retval);
-		goto error_create_attr_group;
-	}
 	if (hcd->uses_new_polling && HCD_POLL_RH(hcd))
 		usb_hcd_poll_rh_status(hcd);
 
 	return retval;
 
-error_create_attr_group:
-	clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags);
-	if (HC_IS_RUNNING(hcd->state))
-		hcd->state = HC_STATE_QUIESCING;
-	spin_lock_irq(&hcd_root_hub_lock);
-	hcd->rh_registered = 0;
-	spin_unlock_irq(&hcd_root_hub_lock);
-
-#ifdef CONFIG_PM
-	cancel_work_sync(&hcd->wakeup_work);
-#endif
-	cancel_work_sync(&hcd->died_work);
-	mutex_lock(&usb_bus_idr_lock);
-	usb_disconnect(&rhdev);		/* Sets rhdev to NULL */
-	mutex_unlock(&usb_bus_idr_lock);
 err_register_root_hub:
 	hcd->rh_pollable = 0;
 	clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
@@ -2964,8 +2842,6 @@ void usb_remove_hcd(struct usb_hcd *hcd)
 	dev_info(hcd->self.controller, "remove, state %x\n", hcd->state);
 
 	usb_get_dev(rhdev);
-	sysfs_remove_group(&rhdev->dev.kobj, &usb_bus_attr_group);
-
 	clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags);
 	if (HC_IS_RUNNING (hcd->state))
 		hcd->state = HC_STATE_QUIESCING;
@@ -3039,6 +2915,40 @@ usb_hcd_platform_shutdown(struct platform_device *dev)
 }
 EXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown);
 
+int usb_hcd_setup_local_mem(struct usb_hcd *hcd, phys_addr_t phys_addr,
+			    dma_addr_t dma, size_t size)
+{
+	int err;
+	void *local_mem;
+
+	hcd->localmem_pool = devm_gen_pool_create(hcd->self.sysdev, 4,
+						  dev_to_node(hcd->self.sysdev),
+						  dev_name(hcd->self.sysdev));
+	if (IS_ERR(hcd->localmem_pool))
+		return PTR_ERR(hcd->localmem_pool);
+
+	local_mem = devm_memremap(hcd->self.sysdev, phys_addr,
+				  size, MEMREMAP_WC);
+	if (IS_ERR(local_mem))
+		return PTR_ERR(local_mem);
+
+	/*
+	 * Here we pass a dma_addr_t but the arg type is a phys_addr_t.
+	 * It's not backed by system memory and thus there's no kernel mapping
+	 * for it.
+	 */
+	err = gen_pool_add_virt(hcd->localmem_pool, (unsigned long)local_mem,
+				dma, size, dev_to_node(hcd->self.sysdev));
+	if (err < 0) {
+		dev_err(hcd->self.sysdev, "gen_pool_add_virt failed with %d\n",
+			err);
+		return err;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(usb_hcd_setup_local_mem);
+
 /*-------------------------------------------------------------------------*/
 
 #if IS_ENABLED(CONFIG_USB_MON)
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 2f94568ba385..236313f41f4a 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -873,7 +873,7 @@ int usb_hub_clear_tt_buffer(struct urb *urb)
 	/* info that CLEAR_TT_BUFFER needs */
 	clear->tt = tt->multi ? udev->ttport : 1;
 	clear->devinfo = usb_pipeendpoint (pipe);
-	clear->devinfo |= udev->devnum << 4;
+	clear->devinfo |= ((u16)udev->devaddr) << 4;
 	clear->devinfo |= usb_pipecontrol(pipe)
 			? (USB_ENDPOINT_XFER_CONTROL << 11)
 			: (USB_ENDPOINT_XFER_BULK << 11);
@@ -2125,6 +2125,8 @@ static void update_devnum(struct usb_device *udev, int devnum)
 	/* The address for a WUSB device is managed by wusbcore. */
 	if (!udev->wusb)
 		udev->devnum = devnum;
+	if (!udev->devaddr)
+		udev->devaddr = (u8)devnum;
 }
 
 static void hub_free_dev(struct usb_device *udev)
@@ -2719,7 +2721,7 @@ static bool use_new_scheme(struct usb_device *udev, int retry,
 }
 
 /* Is a USB 3.0 port in the Inactive or Compliance Mode state?
- * Port worm reset is required to recover
+ * Port warm reset is required to recover
  */
 static bool hub_port_warm_reset_required(struct usb_hub *hub, int port1,
 		u16 portstatus)
@@ -3617,6 +3619,7 @@ static int hub_handle_remote_wakeup(struct usb_hub *hub, unsigned int port,
 	struct usb_device *hdev;
 	struct usb_device *udev;
 	int connect_change = 0;
+	u16 link_state;
 	int ret;
 
 	hdev = hub->hdev;
@@ -3626,9 +3629,11 @@ static int hub_handle_remote_wakeup(struct usb_hub *hub, unsigned int port,
 			return 0;
 		usb_clear_port_feature(hdev, port, USB_PORT_FEAT_C_SUSPEND);
 	} else {
+		link_state = portstatus & USB_PORT_STAT_LINK_STATE;
 		if (!udev || udev->state != USB_STATE_SUSPENDED ||
-				 (portstatus & USB_PORT_STAT_LINK_STATE) !=
-				 USB_SS_PORT_LS_U0)
+				(link_state != USB_SS_PORT_LS_U0 &&
+				 link_state != USB_SS_PORT_LS_U1 &&
+				 link_state != USB_SS_PORT_LS_U2))
 			return 0;
 	}
 
@@ -3999,6 +4004,9 @@ static int usb_set_lpm_timeout(struct usb_device *udev,
  * control transfers to set the hub timeout or enable device-initiated U1/U2
  * will be successful.
  *
+ * If the control transfer to enable device-initiated U1/U2 entry fails, then
+ * hub-initiated U1/U2 will be disabled.
+ *
  * If we cannot set the parent hub U1/U2 timeout, we attempt to let the xHCI
  * driver know about it.  If that call fails, it should be harmless, and just
  * take up more slightly more bus bandwidth for unnecessary U1/U2 exit latency.
@@ -4053,23 +4061,24 @@ static void usb_enable_link_state(struct usb_hcd *hcd, struct usb_device *udev,
 		 * host know that this link state won't be enabled.
 		 */
 		hcd->driver->disable_usb3_lpm_timeout(hcd, udev, state);
-	} else {
-		/* Only a configured device will accept the Set Feature
-		 * U1/U2_ENABLE
-		 */
-		if (udev->actconfig)
-			usb_set_device_initiated_lpm(udev, state, true);
+		return;
+	}
 
-		/* As soon as usb_set_lpm_timeout(timeout) returns 0, the
-		 * hub-initiated LPM is enabled. Thus, LPM is enabled no
-		 * matter the result of usb_set_device_initiated_lpm().
-		 * The only difference is whether device is able to initiate
-		 * LPM.
-		 */
+	/* Only a configured device will accept the Set Feature
+	 * U1/U2_ENABLE
+	 */
+	if (udev->actconfig &&
+	    usb_set_device_initiated_lpm(udev, state, true) == 0) {
 		if (state == USB3_LPM_U1)
 			udev->usb3_lpm_u1_enabled = 1;
 		else if (state == USB3_LPM_U2)
 			udev->usb3_lpm_u2_enabled = 1;
+	} else {
+		/* Don't request U1/U2 entry if the device
+		 * cannot transition to U1/U2.
+		 */
+		usb_set_lpm_timeout(udev, state, 0);
+		hcd->driver->disable_usb3_lpm_timeout(hcd, udev, state);
 	}
 }
 
@@ -4139,7 +4148,7 @@ int usb_disable_lpm(struct usb_device *udev)
 	if (!udev || !udev->parent ||
 			udev->speed < USB_SPEED_SUPER ||
 			!udev->lpm_capable ||
-			udev->state < USB_STATE_DEFAULT)
+			udev->state < USB_STATE_CONFIGURED)
 		return 0;
 
 	hcd = bus_to_hcd(udev->bus);
@@ -4198,7 +4207,7 @@ void usb_enable_lpm(struct usb_device *udev)
 	if (!udev || !udev->parent ||
 			udev->speed < USB_SPEED_SUPER ||
 			!udev->lpm_capable ||
-			udev->state < USB_STATE_DEFAULT)
+			udev->state < USB_STATE_CONFIGURED)
 		return;
 
 	udev->lpm_disable_count--;
diff --git a/drivers/usb/core/notify.c b/drivers/usb/core/notify.c
index ab474b11523e..e6143663778f 100644
--- a/drivers/usb/core/notify.c
+++ b/drivers/usb/core/notify.c
@@ -53,11 +53,8 @@ void usb_notify_add_device(struct usb_device *udev)
 
 void usb_notify_remove_device(struct usb_device *udev)
 {
-	/* Protect against simultaneous usbfs open */
-	mutex_lock(&usbfs_mutex);
 	blocking_notifier_call_chain(&usb_notifier_list,
 			USB_DEVICE_REMOVE, udev);
-	mutex_unlock(&usbfs_mutex);
 }
 
 void usb_notify_add_bus(struct usb_bus *ubus)
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index 7e88fdfe3cf5..f19694e69f5c 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -15,6 +15,7 @@
 #include <linux/kernel.h>
 #include <linux/string.h>
 #include <linux/usb.h>
+#include <linux/usb/hcd.h>
 #include <linux/usb/quirks.h>
 #include <linux/of.h>
 #include "usb.h"
@@ -922,6 +923,116 @@ static struct bin_attribute dev_bin_attr_descriptors = {
 	.size = 18 + 65535,	/* dev descr + max-size raw descriptor */
 };
 
+/*
+ * Show & store the current value of authorized_default
+ */
+static ssize_t authorized_default_show(struct device *dev,
+				       struct device_attribute *attr, char *buf)
+{
+	struct usb_device *rh_usb_dev = to_usb_device(dev);
+	struct usb_bus *usb_bus = rh_usb_dev->bus;
+	struct usb_hcd *hcd;
+
+	hcd = bus_to_hcd(usb_bus);
+	return snprintf(buf, PAGE_SIZE, "%u\n", hcd->dev_policy);
+}
+
+static ssize_t authorized_default_store(struct device *dev,
+					struct device_attribute *attr,
+					const char *buf, size_t size)
+{
+	ssize_t result;
+	unsigned int val;
+	struct usb_device *rh_usb_dev = to_usb_device(dev);
+	struct usb_bus *usb_bus = rh_usb_dev->bus;
+	struct usb_hcd *hcd;
+
+	hcd = bus_to_hcd(usb_bus);
+	result = sscanf(buf, "%u\n", &val);
+	if (result == 1) {
+		hcd->dev_policy = val <= USB_DEVICE_AUTHORIZE_INTERNAL ?
+			val : USB_DEVICE_AUTHORIZE_ALL;
+		result = size;
+	} else {
+		result = -EINVAL;
+	}
+	return result;
+}
+static DEVICE_ATTR_RW(authorized_default);
+
+/*
+ * interface_authorized_default_show - show default authorization status
+ * for USB interfaces
+ *
+ * note: interface_authorized_default is the default value
+ *       for initializing the authorized attribute of interfaces
+ */
+static ssize_t interface_authorized_default_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct usb_device *usb_dev = to_usb_device(dev);
+	struct usb_hcd *hcd = bus_to_hcd(usb_dev->bus);
+
+	return sprintf(buf, "%u\n", !!HCD_INTF_AUTHORIZED(hcd));
+}
+
+/*
+ * interface_authorized_default_store - store default authorization status
+ * for USB interfaces
+ *
+ * note: interface_authorized_default is the default value
+ *       for initializing the authorized attribute of interfaces
+ */
+static ssize_t interface_authorized_default_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct usb_device *usb_dev = to_usb_device(dev);
+	struct usb_hcd *hcd = bus_to_hcd(usb_dev->bus);
+	int rc = count;
+	bool val;
+
+	if (strtobool(buf, &val) != 0)
+		return -EINVAL;
+
+	if (val)
+		set_bit(HCD_FLAG_INTF_AUTHORIZED, &hcd->flags);
+	else
+		clear_bit(HCD_FLAG_INTF_AUTHORIZED, &hcd->flags);
+
+	return rc;
+}
+static DEVICE_ATTR_RW(interface_authorized_default);
+
+/* Group all the USB bus attributes */
+static struct attribute *usb_bus_attrs[] = {
+		&dev_attr_authorized_default.attr,
+		&dev_attr_interface_authorized_default.attr,
+		NULL,
+};
+
+static const struct attribute_group usb_bus_attr_group = {
+	.name = NULL,	/* we want them in the same directory */
+	.attrs = usb_bus_attrs,
+};
+
+
+static int add_default_authorized_attributes(struct device *dev)
+{
+	int rc = 0;
+
+	if (is_usb_device(dev))
+		rc = sysfs_create_group(&dev->kobj, &usb_bus_attr_group);
+
+	return rc;
+}
+
+static void remove_default_authorized_attributes(struct device *dev)
+{
+	if (is_usb_device(dev)) {
+		sysfs_remove_group(&dev->kobj, &usb_bus_attr_group);
+	}
+}
+
 int usb_create_sysfs_dev_files(struct usb_device *udev)
 {
 	struct device *dev = &udev->dev;
@@ -938,7 +1049,14 @@ int usb_create_sysfs_dev_files(struct usb_device *udev)
 	retval = add_power_attributes(dev);
 	if (retval)
 		goto error;
+
+	if (is_root_hub(udev)) {
+		retval = add_default_authorized_attributes(dev);
+		if (retval)
+			goto error;
+	}
 	return retval;
+
 error:
 	usb_remove_sysfs_dev_files(udev);
 	return retval;
@@ -948,6 +1066,9 @@ void usb_remove_sysfs_dev_files(struct usb_device *udev)
 {
 	struct device *dev = &udev->dev;
 
+	if (is_root_hub(udev))
+		remove_default_authorized_attributes(dev);
+
 	remove_power_attributes(dev);
 	remove_persist_attributes(dev);
 	device_remove_bin_file(dev, &dev_bin_attr_descriptors);
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 7fcb9f782931..0ab8738047da 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -325,9 +325,9 @@ struct find_interface_arg {
 	struct device_driver *drv;
 };
 
-static int __find_interface(struct device *dev, void *data)
+static int __find_interface(struct device *dev, const void *data)
 {
-	struct find_interface_arg *arg = data;
+	const struct find_interface_arg *arg = data;
 	struct usb_interface *intf;
 
 	if (!is_usb_interface(dev))
@@ -1185,19 +1185,17 @@ static struct notifier_block usb_bus_nb = {
 	.notifier_call = usb_bus_notify,
 };
 
-struct dentry *usb_debug_root;
-EXPORT_SYMBOL_GPL(usb_debug_root);
+static struct dentry *usb_devices_root;
 
 static void usb_debugfs_init(void)
 {
-	usb_debug_root = debugfs_create_dir("usb", NULL);
-	debugfs_create_file("devices", 0444, usb_debug_root, NULL,
-			    &usbfs_devices_fops);
+	usb_devices_root = debugfs_create_file("devices", 0444, usb_debug_root,
+					       NULL, &usbfs_devices_fops);
 }
 
 static void usb_debugfs_cleanup(void)
 {
-	debugfs_remove_recursive(usb_debug_root);
+	debugfs_remove(usb_devices_root);
 }
 
 /*
diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h
index d95a5358f73d..0c9fde5ad052 100644
--- a/drivers/usb/core/usb.h
+++ b/drivers/usb/core/usb.h
@@ -153,6 +153,11 @@ static inline int is_usb_port(const struct device *dev)
 	return dev->type == &usb_port_device_type;
 }
 
+static inline int is_root_hub(struct usb_device *udev)
+{
+	return (udev->parent == NULL);
+}
+
 /* Do the same for device drivers and interface drivers. */
 
 static inline int is_usb_device_driver(struct device_driver *drv)
@@ -169,7 +174,6 @@ extern const struct attribute_group *usb_device_groups[];
 extern const struct attribute_group *usb_interface_groups[];
 
 /* usbfs stuff */
-extern struct mutex usbfs_mutex;
 extern struct usb_driver usbfs_driver;
 extern const struct file_operations usbfs_devices_fops;
 extern const struct file_operations usbdev_file_operations;