diff options
Diffstat (limited to 'drivers/usb/core/devio.c')
| -rw-r--r-- | drivers/usb/core/devio.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c index e09935acae8..bbd029f68fa 100644 --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -59,6 +59,22 @@ /* Mutual exclusion for removal, open, and release */ DEFINE_MUTEX(usbfs_mutex); +struct dev_state { + struct list_head list; /* state list */ + struct usb_device *dev; + struct file *file; + spinlock_t lock; /* protects the async urb lists */ + struct list_head async_pending; + struct list_head async_completed; + wait_queue_head_t wait; /* wake up if a request completed */ + unsigned int discsignr; + struct pid *disc_pid; + uid_t disc_uid, disc_euid; + void __user *disccontext; + unsigned long ifclaimed; + u32 secid; +}; + struct async { struct list_head asynclist; struct dev_state *ps; @@ -1680,6 +1696,28 @@ const struct file_operations usbdev_file_operations = { .release = usbdev_release, }; +void usb_fs_classdev_common_remove(struct usb_device *udev) +{ + struct dev_state *ps; + struct siginfo sinfo; + + while (!list_empty(&udev->filelist)) { + ps = list_entry(udev->filelist.next, struct dev_state, list); + destroy_all_async(ps); + wake_up_all(&ps->wait); + list_del_init(&ps->list); + if (ps->discsignr) { + sinfo.si_signo = ps->discsignr; + sinfo.si_errno = EPIPE; + sinfo.si_code = SI_ASYNCIO; + sinfo.si_addr = ps->disccontext; + kill_pid_info_as_uid(ps->discsignr, &sinfo, + ps->disc_pid, ps->disc_uid, + ps->disc_euid, ps->secid); + } + } +} + #ifdef CONFIG_USB_DEVICE_CLASS static struct class *usb_classdev_class; @@ -1699,6 +1737,7 @@ static int usb_classdev_add(struct usb_device *dev) static void usb_classdev_remove(struct usb_device *dev) { device_unregister(dev->usb_classdev); + usb_fs_classdev_common_remove(dev); } static int usb_classdev_notify(struct notifier_block *self, |