X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fusb%2Fcore%2Fdriver.c;h=8586817698ad8db8f9abbee331075eef2c884077;hb=0a4908e19fd016d60403fc76cf38b2d08d21e2d2;hp=63b1243a9139d7071a221255bdacde5e524b5996;hpb=ae292dbd2e9385d4c63f0c7099ab73b60d1b26d3;p=linux-2.6-omap-h63xx.git diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c index 63b1243a913..8586817698a 100644 --- a/drivers/usb/core/driver.c +++ b/drivers/usb/core/driver.c @@ -202,6 +202,11 @@ static int usb_probe_interface(struct device *dev) intf = to_usb_interface(dev); udev = interface_to_usbdev(intf); + if (udev->authorized == 0) { + dev_err(&intf->dev, "Device is not authorized for usage\n"); + return -ENODEV; + } + id = usb_match_id(intf, driver->id_table); if (!id) id = usb_match_dynamic_id(intf, driver); @@ -576,12 +581,9 @@ static int usb_device_match(struct device *dev, struct device_driver *drv) } #ifdef CONFIG_HOTPLUG -static int usb_uevent(struct device *dev, char **envp, int num_envp, - char *buffer, int buffer_size) +static int usb_uevent(struct device *dev, struct kobj_uevent_env *env) { struct usb_device *usb_dev; - int i = 0; - int length = 0; if (!dev) return -ENODEV; @@ -610,51 +612,39 @@ static int usb_uevent(struct device *dev, char **envp, int num_envp, * all the device descriptors we don't tell them about. Or * act as usermode drivers. */ - if (add_uevent_var(envp, num_envp, &i, - buffer, buffer_size, &length, - "DEVICE=/proc/bus/usb/%03d/%03d", + if (add_uevent_var(env, "DEVICE=/proc/bus/usb/%03d/%03d", usb_dev->bus->busnum, usb_dev->devnum)) return -ENOMEM; #endif /* per-device configurations are common */ - if (add_uevent_var(envp, num_envp, &i, - buffer, buffer_size, &length, - "PRODUCT=%x/%x/%x", + if (add_uevent_var(env, "PRODUCT=%x/%x/%x", le16_to_cpu(usb_dev->descriptor.idVendor), le16_to_cpu(usb_dev->descriptor.idProduct), le16_to_cpu(usb_dev->descriptor.bcdDevice))) return -ENOMEM; /* class-based driver binding models */ - if (add_uevent_var(envp, num_envp, &i, - buffer, buffer_size, &length, - "TYPE=%d/%d/%d", + if (add_uevent_var(env, "TYPE=%d/%d/%d", usb_dev->descriptor.bDeviceClass, usb_dev->descriptor.bDeviceSubClass, usb_dev->descriptor.bDeviceProtocol)) return -ENOMEM; - if (add_uevent_var(envp, num_envp, &i, - buffer, buffer_size, &length, - "BUSNUM=%03d", + if (add_uevent_var(env, "BUSNUM=%03d", usb_dev->bus->busnum)) return -ENOMEM; - if (add_uevent_var(envp, num_envp, &i, - buffer, buffer_size, &length, - "DEVNUM=%03d", + if (add_uevent_var(env, "DEVNUM=%03d", usb_dev->devnum)) return -ENOMEM; - envp[i] = NULL; return 0; } #else -static int usb_uevent(struct device *dev, char **envp, - int num_envp, char *buffer, int buffer_size) +static int usb_uevent(struct device *dev, struct kobj_uevent_env *env) { return -ENODEV; } @@ -945,11 +935,11 @@ done: #ifdef CONFIG_USB_SUSPEND /* Internal routine to check whether we may autosuspend a device. */ -static int autosuspend_check(struct usb_device *udev) +static int autosuspend_check(struct usb_device *udev, int reschedule) { int i; struct usb_interface *intf; - unsigned long suspend_time; + unsigned long suspend_time, j; /* For autosuspend, fail fast if anything is in use or autosuspend * is disabled. Also fail if any interfaces require remote wakeup @@ -991,20 +981,20 @@ static int autosuspend_check(struct usb_device *udev) } /* If everything is okay but the device hasn't been idle for long - * enough, queue a delayed autosuspend request. + * enough, queue a delayed autosuspend request. If the device + * _has_ been idle for long enough and the reschedule flag is set, + * likewise queue a delayed (1 second) autosuspend request. */ - if (time_after(suspend_time, jiffies)) { + j = jiffies; + if (time_before(j, suspend_time)) + reschedule = 1; + else + suspend_time = j + HZ; + if (reschedule) { if (!timer_pending(&udev->autosuspend.timer)) { - - /* The value of jiffies may change between the - * time_after() comparison above and the subtraction - * below. That's okay; the system behaves sanely - * when a timer is registered for the present moment - * or for the past. - */ queue_delayed_work(ksuspend_usb_wq, &udev->autosuspend, - round_jiffies_relative(suspend_time - jiffies)); - } + round_jiffies_relative(suspend_time - j)); + } return -EAGAIN; } return 0; @@ -1012,7 +1002,7 @@ static int autosuspend_check(struct usb_device *udev) #else -static inline int autosuspend_check(struct usb_device *udev) +static inline int autosuspend_check(struct usb_device *udev, int reschedule) { return 0; } @@ -1069,7 +1059,7 @@ static int usb_suspend_both(struct usb_device *udev, pm_message_t msg) udev->do_remote_wakeup = device_may_wakeup(&udev->dev); if (udev->auto_pm) { - status = autosuspend_check(udev); + status = autosuspend_check(udev, 0); if (status < 0) goto done; } @@ -1083,15 +1073,8 @@ static int usb_suspend_both(struct usb_device *udev, pm_message_t msg) break; } } - if (status == 0) { - - /* Non-root devices don't need to do anything for FREEZE - * or PRETHAW. */ - if (udev->parent && (msg.event == PM_EVENT_FREEZE || - msg.event == PM_EVENT_PRETHAW)) - goto done; + if (status == 0) status = usb_suspend_device(udev, msg); - } /* If the suspend failed, resume interfaces that did get suspended */ if (status != 0) { @@ -1102,12 +1085,24 @@ static int usb_suspend_both(struct usb_device *udev, pm_message_t msg) /* Try another autosuspend when the interfaces aren't busy */ if (udev->auto_pm) - autosuspend_check(udev); + autosuspend_check(udev, status == -EBUSY); - /* If the suspend succeeded, propagate it up the tree */ + /* If the suspend succeeded then prevent any more URB submissions, + * flush any outstanding URBs, and propagate the suspend up the tree. + */ } else { cancel_delayed_work(&udev->autosuspend); - if (parent) + udev->can_submit = 0; + for (i = 0; i < 16; ++i) { + usb_hcd_flush_endpoint(udev, udev->ep_out[i]); + usb_hcd_flush_endpoint(udev, udev->ep_in[i]); + } + + /* If this is just a FREEZE or a PRETHAW, udev might + * not really be suspended. Only true suspends get + * propagated up the device tree. + */ + if (parent && udev->state == USB_STATE_SUSPENDED) usb_autosuspend_device(parent); } @@ -1156,6 +1151,7 @@ static int usb_resume_both(struct usb_device *udev) status = -ENODEV; goto done; } + udev->can_submit = 1; /* Propagate the resume up the tree, if necessary */ if (udev->state == USB_STATE_SUSPENDED) { @@ -1529,9 +1525,21 @@ int usb_external_resume_device(struct usb_device *udev) static int usb_suspend(struct device *dev, pm_message_t message) { + struct usb_device *udev; + if (!is_usb_device(dev)) /* Ignore PM for interfaces */ return 0; - return usb_external_suspend_device(to_usb_device(dev), message); + udev = to_usb_device(dev); + + /* If udev is already suspended, we can skip this suspend and + * we should also skip the upcoming system resume. */ + if (udev->state == USB_STATE_SUSPENDED) { + udev->skip_sys_resume = 1; + return 0; + } + + udev->skip_sys_resume = 0; + return usb_external_suspend_device(udev, message); } static int usb_resume(struct device *dev) @@ -1542,13 +1550,14 @@ static int usb_resume(struct device *dev) return 0; udev = to_usb_device(dev); - /* If autoresume is disabled then we also want to prevent resume - * during system wakeup. However, a "persistent-device" reset-resume - * after power loss counts as a wakeup event. So allow a - * reset-resume to occur if remote wakeup is enabled. */ - if (udev->autoresume_disabled) { + /* If udev->skip_sys_resume is set then udev was already suspended + * when the system suspend started, so we don't want to resume + * udev during this system wakeup. However a reset-resume counts + * as a wakeup event, so allow a reset-resume to occur if remote + * wakeup is enabled. */ + if (udev->skip_sys_resume) { if (!(udev->reset_resume && udev->do_remote_wakeup)) - return -EPERM; + return -EHOSTUNREACH; } return usb_external_resume_device(udev); }