diff options
Diffstat (limited to 'drivers/usb/core')
| -rw-r--r-- | drivers/usb/core/buffer.c | 26 | ||||
| -rw-r--r-- | drivers/usb/core/devio.c | 63 | ||||
| -rw-r--r-- | drivers/usb/core/driver.c | 29 | ||||
| -rw-r--r-- | drivers/usb/core/hcd.c | 16 | ||||
| -rw-r--r-- | drivers/usb/core/hub.c | 94 | ||||
| -rw-r--r-- | drivers/usb/core/message.c | 23 | ||||
| -rw-r--r-- | drivers/usb/core/otg_whitelist.h | 5 | ||||
| -rw-r--r-- | drivers/usb/core/quirks.c | 4 | ||||
| -rw-r--r-- | drivers/usb/core/usb.c | 1 |
9 files changed, 123 insertions, 138 deletions
diff --git a/drivers/usb/core/buffer.c b/drivers/usb/core/buffer.c index 684ef70dc09d..506b969ea7fd 100644 --- a/drivers/usb/core/buffer.c +++ b/drivers/usb/core/buffer.c @@ -22,17 +22,25 @@ */ /* FIXME tune these based on pool statistics ... */ -static const size_t pool_max[HCD_BUFFER_POOLS] = { - /* platforms without dma-friendly caches might need to - * prevent cacheline sharing... - */ - 32, - 128, - 512, - PAGE_SIZE / 2 - /* bigger --> allocate pages */ +static size_t pool_max[HCD_BUFFER_POOLS] = { + 32, 128, 512, 2048, }; +void __init usb_init_pool_max(void) +{ + /* + * The pool_max values must never be smaller than + * ARCH_KMALLOC_MINALIGN. + */ + if (ARCH_KMALLOC_MINALIGN <= 32) + ; /* Original value is okay */ + else if (ARCH_KMALLOC_MINALIGN <= 64) + pool_max[0] = 64; + else if (ARCH_KMALLOC_MINALIGN <= 128) + pool_max[0] = 0; /* Don't use this pool */ + else + BUILD_BUG(); /* We don't allow this */ +} /* SETUP primitives */ diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c index 0b59731c3021..66abdbcfbfa5 100644 --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -1689,7 +1689,7 @@ static struct async *reap_as(struct usb_dev_state *ps) for (;;) { __set_current_state(TASK_INTERRUPTIBLE); as = async_getcompleted(ps); - if (as) + if (as || !connected(ps)) break; if (signal_pending(current)) break; @@ -1712,7 +1712,7 @@ static int proc_reapurb(struct usb_dev_state *ps, void __user *arg) } if (signal_pending(current)) return -EINTR; - return -EIO; + return -ENODEV; } static int proc_reapurbnonblock(struct usb_dev_state *ps, void __user *arg) @@ -1721,10 +1721,11 @@ static int proc_reapurbnonblock(struct usb_dev_state *ps, void __user *arg) struct async *as; as = async_getcompleted(ps); - retval = -EAGAIN; if (as) { retval = processcompl(as, (void __user * __user *)arg); free_async(as); + } else { + retval = (connected(ps) ? -EAGAIN : -ENODEV); } return retval; } @@ -1854,7 +1855,7 @@ static int proc_reapurb_compat(struct usb_dev_state *ps, void __user *arg) } if (signal_pending(current)) return -EINTR; - return -EIO; + return -ENODEV; } static int proc_reapurbnonblock_compat(struct usb_dev_state *ps, void __user *arg) @@ -1862,11 +1863,12 @@ static int proc_reapurbnonblock_compat(struct usb_dev_state *ps, void __user *ar int retval; struct async *as; - retval = -EAGAIN; as = async_getcompleted(ps); if (as) { retval = processcompl_compat(as, (void __user * __user *)arg); free_async(as); + } else { + retval = (connected(ps) ? -EAGAIN : -ENODEV); } return retval; } @@ -2038,7 +2040,8 @@ static int proc_get_capabilities(struct usb_dev_state *ps, void __user *arg) { __u32 caps; - caps = USBDEVFS_CAP_ZERO_PACKET | USBDEVFS_CAP_NO_PACKET_SIZE_LIM; + caps = USBDEVFS_CAP_ZERO_PACKET | USBDEVFS_CAP_NO_PACKET_SIZE_LIM | + USBDEVFS_CAP_REAP_AFTER_DISCONNECT; if (!ps->dev->bus->no_stop_on_short) caps |= USBDEVFS_CAP_BULK_CONTINUATION; if (ps->dev->bus->sg_tablesize) @@ -2138,6 +2141,32 @@ static long usbdev_do_ioctl(struct file *file, unsigned int cmd, return -EPERM; usb_lock_device(dev); + + /* Reap operations are allowed even after disconnection */ + switch (cmd) { + case USBDEVFS_REAPURB: + snoop(&dev->dev, "%s: REAPURB\n", __func__); + ret = proc_reapurb(ps, p); + goto done; + + case USBDEVFS_REAPURBNDELAY: + snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__); + ret = proc_reapurbnonblock(ps, p); + goto done; + +#ifdef CONFIG_COMPAT + case USBDEVFS_REAPURB32: + snoop(&dev->dev, "%s: REAPURB32\n", __func__); + ret = proc_reapurb_compat(ps, p); + goto done; + + case USBDEVFS_REAPURBNDELAY32: + snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__); + ret = proc_reapurbnonblock_compat(ps, p); + goto done; +#endif + } + if (!connected(ps)) { usb_unlock_device(dev); return -ENODEV; @@ -2231,16 +2260,6 @@ static long usbdev_do_ioctl(struct file *file, unsigned int cmd, inode->i_mtime = CURRENT_TIME; break; - case USBDEVFS_REAPURB32: - snoop(&dev->dev, "%s: REAPURB32\n", __func__); - ret = proc_reapurb_compat(ps, p); - break; - - case USBDEVFS_REAPURBNDELAY32: - snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__); - ret = proc_reapurbnonblock_compat(ps, p); - break; - case USBDEVFS_IOCTL32: snoop(&dev->dev, "%s: IOCTL32\n", __func__); ret = proc_ioctl_compat(ps, ptr_to_compat(p)); @@ -2252,16 +2271,6 @@ static long usbdev_do_ioctl(struct file *file, unsigned int cmd, ret = proc_unlinkurb(ps, p); break; - case USBDEVFS_REAPURB: - snoop(&dev->dev, "%s: REAPURB\n", __func__); - ret = proc_reapurb(ps, p); - break; - - case USBDEVFS_REAPURBNDELAY: - snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__); - ret = proc_reapurbnonblock(ps, p); - break; - case USBDEVFS_DISCSIGNAL: snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__); ret = proc_disconnectsignal(ps, p); @@ -2304,6 +2313,8 @@ static long usbdev_do_ioctl(struct file *file, unsigned int cmd, ret = proc_free_streams(ps, p); break; } + + done: usb_unlock_device(dev); if (ret >= 0) inode->i_atime = CURRENT_TIME; diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c index 874dec31a111..818369afff63 100644 --- a/drivers/usb/core/driver.c +++ b/drivers/usb/core/driver.c @@ -275,21 +275,6 @@ static int usb_unbind_device(struct device *dev) return 0; } -/* - * Cancel any pending scheduled resets - * - * [see usb_queue_reset_device()] - * - * Called after unconfiguring / when releasing interfaces. See - * comments in __usb_queue_reset_device() regarding - * udev->reset_running. - */ -static void usb_cancel_queued_reset(struct usb_interface *iface) -{ - if (iface->reset_running == 0) - cancel_work_sync(&iface->reset_ws); -} - /* called from driver core with dev locked */ static int usb_probe_interface(struct device *dev) { @@ -380,7 +365,6 @@ static int usb_probe_interface(struct device *dev) usb_set_intfdata(intf, NULL); intf->needs_remote_wakeup = 0; intf->condition = USB_INTERFACE_UNBOUND; - usb_cancel_queued_reset(intf); /* If the LPM disable succeeded, balance the ref counts. */ if (!lpm_disable_error) @@ -425,7 +409,6 @@ static int usb_unbind_interface(struct device *dev) usb_disable_interface(udev, intf, false); driver->disconnect(intf); - usb_cancel_queued_reset(intf); /* Free streams */ for (i = 0, j = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) { @@ -1797,6 +1780,18 @@ static int autosuspend_check(struct usb_device *udev) dev_dbg(&udev->dev, "remote wakeup needed for autosuspend\n"); return -EOPNOTSUPP; } + + /* + * If the device is a direct child of the root hub and the HCD + * doesn't handle wakeup requests, don't allow autosuspend when + * wakeup is needed. + */ + if (w && udev->parent == udev->bus->root_hub && + bus_to_hcd(udev->bus)->cant_recv_wakeups) { + dev_dbg(&udev->dev, "HCD doesn't handle wakeup requests\n"); + return -EOPNOTSUPP; + } + udev->do_remote_wakeup = w; return 0; } diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index 11cee55ae397..45a915ccd71c 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -1618,6 +1618,7 @@ static int unlink1(struct usb_hcd *hcd, struct urb *urb, int status) int usb_hcd_unlink_urb (struct urb *urb, int status) { struct usb_hcd *hcd; + struct usb_device *udev = urb->dev; int retval = -EIDRM; unsigned long flags; @@ -1629,20 +1630,19 @@ int usb_hcd_unlink_urb (struct urb *urb, int status) spin_lock_irqsave(&hcd_urb_unlink_lock, flags); if (atomic_read(&urb->use_count) > 0) { retval = 0; - usb_get_dev(urb->dev); + usb_get_dev(udev); } spin_unlock_irqrestore(&hcd_urb_unlink_lock, flags); if (retval == 0) { hcd = bus_to_hcd(urb->dev->bus); retval = unlink1(hcd, urb, status); - usb_put_dev(urb->dev); + if (retval == 0) + retval = -EINPROGRESS; + else if (retval != -EIDRM && retval != -EBUSY) + dev_dbg(&udev->dev, "hcd_unlink_urb %p fail %d\n", + urb, retval); + usb_put_dev(udev); } - - if (retval == 0) - retval = -EINPROGRESS; - else if (retval != -EIDRM && retval != -EBUSY) - dev_dbg(&urb->dev->dev, "hcd_unlink_urb %p fail %d\n", - urb, retval); return retval; } diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index aeb50bb6ba9c..d7c3d5a35946 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -2896,10 +2896,12 @@ static int port_is_suspended(struct usb_hub *hub, unsigned portstatus) */ static int check_port_resume_type(struct usb_device *udev, struct usb_hub *hub, int port1, - int status, unsigned portchange, unsigned portstatus) + int status, u16 portchange, u16 portstatus) { struct usb_port *port_dev = hub->ports[port1 - 1]; + int retries = 3; + retry: /* Is a warm reset needed to recover the connection? */ if (status == 0 && udev->reset_resume && hub_port_warm_reset_required(hub, port1, portstatus)) { @@ -2907,10 +2909,17 @@ static int check_port_resume_type(struct usb_device *udev, } /* Is the device still present? */ else if (status || port_is_suspended(hub, portstatus) || - !port_is_power_on(hub, portstatus) || - !(portstatus & USB_PORT_STAT_CONNECTION)) { + !port_is_power_on(hub, portstatus)) { if (status >= 0) status = -ENODEV; + } else if (!(portstatus & USB_PORT_STAT_CONNECTION)) { + if (retries--) { + usleep_range(200, 300); + status = hub_port_status(hub, port1, &portstatus, + &portchange); + goto retry; + } + status = -ENODEV; } /* Can't do a normal resume if the port isn't enabled, @@ -3452,8 +3461,6 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg) return status; } -#ifdef CONFIG_PM - int usb_remote_wakeup(struct usb_device *udev) { int status = 0; @@ -3512,16 +3519,6 @@ static int hub_handle_remote_wakeup(struct usb_hub *hub, unsigned int port, return connect_change; } -#else - -static int hub_handle_remote_wakeup(struct usb_hub *hub, unsigned int port, - u16 portstatus, u16 portchange) -{ - return 0; -} - -#endif - static int check_ports_changed(struct usb_hub *hub) { int port1; @@ -4655,9 +4652,13 @@ static void hub_port_connect(struct usb_hub *hub, int port1, u16 portstatus, if (!(portstatus & USB_PORT_STAT_CONNECTION) || test_bit(port1, hub->removed_bits)) { - /* maybe switch power back on (e.g. root hub was reset) */ + /* + * maybe switch power back on (e.g. root hub was reset) + * but only if the port isn't owned by someone else. + */ if (hub_is_port_power_switchable(hub) - && !port_is_power_on(hub, portstatus)) + && !port_is_power_on(hub, portstatus) + && !port_dev->port_owner) set_port_feature(hdev, port1, USB_PORT_FEAT_POWER); if (portstatus & USB_PORT_STAT_ENABLE) @@ -4882,7 +4883,7 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1, static void port_event(struct usb_hub *hub, int port1) __must_hold(&port_dev->status_lock) { - int connect_change, reset_device = 0; + int connect_change; struct usb_port *port_dev = hub->ports[port1 - 1]; struct usb_device *udev = port_dev->child; struct usb_device *hdev = hub->hdev; @@ -4970,30 +4971,14 @@ static void port_event(struct usb_hub *hub, int port1) if (hub_port_reset(hub, port1, NULL, HUB_BH_RESET_TIME, true) < 0) hub_port_disable(hub, port1, 1); - } else - reset_device = 1; - } - - /* - * On disconnect USB3 protocol ports transit from U0 to - * SS.Inactive to Rx.Detect. If this happens a warm- - * reset is not needed, but a (re)connect may happen - * before hub_wq runs and sees the disconnect, and the - * device may be an unknown state. - * - * If the port went through SS.Inactive without hub_wq - * seeing it the C_LINK_STATE change flag will be set, - * and we reset the dev to put it in a known state. - */ - if (reset_device || (udev && hub_is_superspeed(hub->hdev) - && (portchange & USB_PORT_STAT_C_LINK_STATE) - && (portstatus & USB_PORT_STAT_CONNECTION))) { - usb_unlock_port(port_dev); - usb_lock_device(udev); - usb_reset_device(udev); - usb_unlock_device(udev); - usb_lock_port(port_dev); - connect_change = 0; + } else { + usb_unlock_port(port_dev); + usb_lock_device(udev); + usb_reset_device(udev); + usb_unlock_device(udev); + usb_lock_port(port_dev); + connect_change = 0; + } } if (connect_change) @@ -5589,26 +5574,19 @@ EXPORT_SYMBOL_GPL(usb_reset_device); * possible; depending on how the driver attached to each interface * handles ->pre_reset(), the second reset might happen or not. * - * - If a driver is unbound and it had a pending reset, the reset will - * be cancelled. - * - * - This function can be called during .probe() or .disconnect() - * times. On return from .disconnect(), any pending resets will be - * cancelled. - * - * There is no no need to lock/unlock the @reset_ws as schedule_work() - * does its own. + * - If the reset is delayed so long that the interface is unbound from + * its driver, the reset will be skipped. * - * NOTE: We don't do any reference count tracking because it is not - * needed. The lifecycle of the work_struct is tied to the - * usb_interface. Before destroying the interface we cancel the - * work_struct, so the fact that work_struct is queued and or - * running means the interface (and thus, the device) exist and - * are referenced. + * - This function can be called during .probe(). It can also be called + * during .disconnect(), but doing so is pointless because the reset + * will not occur. If you really want to reset the device during + * .disconnect(), call usb_reset_device() directly -- but watch out + * for nested unbinding issues! */ void usb_queue_reset_device(struct usb_interface *iface) { - schedule_work(&iface->reset_ws); + if (schedule_work(&iface->reset_ws)) + usb_get_intf(iface); } EXPORT_SYMBOL_GPL(usb_queue_reset_device); diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c index f7b7713cfb2a..f368d2053da5 100644 --- a/drivers/usb/core/message.c +++ b/drivers/usb/core/message.c @@ -1551,6 +1551,7 @@ static void usb_release_interface(struct device *dev) altsetting_to_usb_interface_cache(intf->altsetting); kref_put(&intfc->ref, usb_release_interface_cache); + usb_put_dev(interface_to_usbdev(intf)); kfree(intf); } @@ -1626,24 +1627,6 @@ static struct usb_interface_assoc_descriptor *find_iad(struct usb_device *dev, /* * Internal function to queue a device reset - * - * This is initialized into the workstruct in 'struct - * usb_device->reset_ws' that is launched by - * message.c:usb_set_configuration() when initializing each 'struct - * usb_interface'. - * - * It is safe to get the USB device without reference counts because - * the life cycle of @iface is bound to the life cycle of @udev. Then, - * this function will be ran only if @iface is alive (and before - * freeing it any scheduled instances of it will have been cancelled). - * - * We need to set a flag (usb_dev->reset_running) because when we call - * the reset, the interfaces might be unbound. The current interface - * cannot try to remove the queued work as it would cause a deadlock - * (you cannot remove your work from within your executing - * workqueue). This flag lets it know, so that - * usb_cancel_queued_reset() doesn't try to do it. - * * See usb_queue_reset_device() for more details */ static void __usb_queue_reset_device(struct work_struct *ws) @@ -1655,11 +1638,10 @@ static void __usb_queue_reset_device(struct work_struct *ws) rc = usb_lock_device_for_reset(udev, iface); if (rc >= 0) { - iface->reset_running = 1; usb_reset_device(udev); - iface->reset_running = 0; usb_unlock_device(udev); } + usb_put_intf(iface); /* Undo _get_ in usb_queue_reset_device() */ } @@ -1854,6 +1836,7 @@ free_interfaces: dev_set_name(&intf->dev, "%d-%s:%d.%d", dev->bus->busnum, dev->devpath, configuration, alt->desc.bInterfaceNumber); + usb_get_dev(dev); } kfree(new_interfaces); diff --git a/drivers/usb/core/otg_whitelist.h b/drivers/usb/core/otg_whitelist.h index de0c9c9d7091..a6315abe7b7c 100644 --- a/drivers/usb/core/otg_whitelist.h +++ b/drivers/usb/core/otg_whitelist.h @@ -55,6 +55,11 @@ static int is_targeted(struct usb_device *dev) le16_to_cpu(dev->descriptor.idProduct) == 0xbadd)) return 0; + /* OTG PET device is always targeted (see OTG 2.0 ECN 6.4.2) */ + if ((le16_to_cpu(dev->descriptor.idVendor) == 0x1a0a && + le16_to_cpu(dev->descriptor.idProduct) == 0x0200)) + return 1; + /* NOTE: can't use usb_match_id() since interface caches * aren't set up yet. this is cut/paste from that code. */ diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c index 0ffb4ed0a945..41e510ae8c83 100644 --- a/drivers/usb/core/quirks.c +++ b/drivers/usb/core/quirks.c @@ -179,6 +179,10 @@ static const struct usb_device_id usb_quirk_list[] = { { USB_DEVICE(0x0b05, 0x17e0), .driver_info = USB_QUIRK_IGNORE_REMOTE_WAKEUP }, + /* Protocol and OTG Electrical Test Device */ + { USB_DEVICE(0x1a0a, 0x0200), .driver_info = + USB_QUIRK_LINEAR_UFRAME_INTR_BINTERVAL }, + { } /* terminating entry must be last */ }; diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index 2a92b97f0144..b1fb9aef0f5b 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -1049,6 +1049,7 @@ static int __init usb_init(void) pr_info("%s: USB support disabled\n", usbcore_name); return 0; } + usb_init_pool_max(); retval = usb_debugfs_init(); if (retval) |