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-rw-r--r--drivers/usb/core/Kconfig1
-rw-r--r--drivers/usb/core/buffer.c17
-rw-r--r--drivers/usb/core/config.c4
-rw-r--r--drivers/usb/core/devio.c123
-rw-r--r--drivers/usb/core/hcd.c51
-rw-r--r--drivers/usb/core/hub.c45
-rw-r--r--drivers/usb/core/notify.c3
-rw-r--r--drivers/usb/core/quirks.c6
-rw-r--r--drivers/usb/core/usb.c14
-rw-r--r--drivers/usb/core/usb.h1
10 files changed, 171 insertions, 94 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/config.c b/drivers/usb/core/config.c
index 20ff036b4c22..9d6cb709ca7b 100644
--- a/drivers/usb/core/config.c
+++ b/drivers/usb/core/config.c
@@ -932,8 +932,8 @@ int usb_get_bos_descriptor(struct usb_device *dev)
/* Get BOS descriptor */
ret = usb_get_descriptor(dev, USB_DT_BOS, 0, bos, USB_DT_BOS_SIZE);
- if (ret < USB_DT_BOS_SIZE) {
- dev_err(ddev, "unable to get BOS descriptor\n");
+ if (ret < USB_DT_BOS_SIZE || bos->bLength < USB_DT_BOS_SIZE) {
+ dev_err(ddev, "unable to get BOS descriptor or descriptor too short\n");
if (ret >= 0)
ret = -ENOMSG;
kfree(bos);
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index fa783531ee88..b265ab5405f9 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;
@@ -1801,13 +1824,17 @@ 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 +2004,7 @@ 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 +2032,17 @@ 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 +2123,7 @@ 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 +2161,9 @@ 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 +2180,6 @@ 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 +2281,7 @@ 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 +2580,13 @@ 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 +2650,15 @@ 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..9320787ac2e6 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>
@@ -1345,14 +1347,14 @@ 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 +1364,6 @@ 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 +1530,7 @@ 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 +1600,7 @@ 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,
@@ -3039,6 +3038,40 @@ 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/quirks.c b/drivers/usb/core/quirks.c
index 8bc35d53408b..6b6413073584 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -209,9 +209,15 @@ static const struct usb_device_id usb_quirk_list[] = {
/* Microsoft LifeCam-VX700 v2.0 */
{ USB_DEVICE(0x045e, 0x0770), .driver_info = USB_QUIRK_RESET_RESUME },
+ /* Microsoft Surface Dock Ethernet (RTL8153 GigE) */
+ { USB_DEVICE(0x045e, 0x07c6), .driver_info = USB_QUIRK_NO_LPM },
+
/* Cherry Stream G230 2.0 (G85-231) and 3.0 (G85-232) */
{ USB_DEVICE(0x046a, 0x0023), .driver_info = USB_QUIRK_RESET_RESUME },
+ /* Logitech HD Webcam C270 */
+ { USB_DEVICE(0x046d, 0x0825), .driver_info = USB_QUIRK_RESET_RESUME },
+
/* Logitech HD Pro Webcams C920, C920-C, C925e and C930e */
{ USB_DEVICE(0x046d, 0x082d), .driver_info = USB_QUIRK_DELAY_INIT },
{ USB_DEVICE(0x046d, 0x0841), .driver_info = USB_QUIRK_DELAY_INIT },
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..bd8d01f85a13 100644
--- a/drivers/usb/core/usb.h
+++ b/drivers/usb/core/usb.h
@@ -169,7 +169,6 @@ 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;
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