2.6.27-stable review patch. If anyone has any objections, please let us know. ------------------ From: Alan Stern commit 501950d846218ed80a776d2aae5aed9c8b92e778 upstream. This patch (as1198) fixes a conceptual bug: Somewhere along the line we managed to confuse USB class devices with USB char devices. As a result, the code to send a disconnect signal to userspace would not be built if both CONFIG_USB_DEVICE_CLASS and CONFIG_USB_DEVICEFS were disabled. The usb_fs_classdev_common_remove() routine has been renamed to usbdev_remove() and it is now called whenever any USB device is removed, not just when a class device is unregistered. The notifier registration and unregistration calls are no longer conditionally compiled. And since the common removal code will always be called as part of the char device interface, there's no need to call it again as part of the usbfs interface; thus the invocation of usb_fs_classdev_common_remove() has been taken out of usbfs_remove_device(). Signed-off-by: Alan Stern Reported-by: Alon Bar-Lev Tested-by: Alon Bar-Lev Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/devio.c | 20 ++++++++++++-------- drivers/usb/core/inode.c | 1 - drivers/usb/core/usb.h | 1 - 3 files changed, 12 insertions(+), 10 deletions(-) --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -1700,7 +1700,7 @@ const struct file_operations usbdev_file .release = usbdev_release, }; -void usb_fs_classdev_common_remove(struct usb_device *udev) +static void usbdev_remove(struct usb_device *udev) { struct dev_state *ps; struct siginfo sinfo; @@ -1742,10 +1742,15 @@ static void usb_classdev_remove(struct u { if (dev->usb_classdev) device_unregister(dev->usb_classdev); - usb_fs_classdev_common_remove(dev); } -static int usb_classdev_notify(struct notifier_block *self, +#else +#define usb_classdev_add(dev) 0 +#define usb_classdev_remove(dev) do {} while (0) + +#endif + +static int usbdev_notify(struct notifier_block *self, unsigned long action, void *dev) { switch (action) { @@ -1755,15 +1760,15 @@ static int usb_classdev_notify(struct no break; case USB_DEVICE_REMOVE: usb_classdev_remove(dev); + usbdev_remove(dev); break; } return NOTIFY_OK; } static struct notifier_block usbdev_nb = { - .notifier_call = usb_classdev_notify, + .notifier_call = usbdev_notify, }; -#endif static struct cdev usb_device_cdev; @@ -1797,9 +1802,8 @@ int __init usb_devio_init(void) * to /sys/dev */ usb_classdev_class->dev_kobj = NULL; - - usb_register_notify(&usbdev_nb); #endif + usb_register_notify(&usbdev_nb); out: return retval; @@ -1810,8 +1814,8 @@ error_cdev: void usb_devio_cleanup(void) { -#ifdef CONFIG_USB_DEVICE_CLASS usb_unregister_notify(&usbdev_nb); +#ifdef CONFIG_USB_DEVICE_CLASS class_destroy(usb_classdev_class); #endif cdev_del(&usb_device_cdev); --- a/drivers/usb/core/inode.c +++ b/drivers/usb/core/inode.c @@ -716,7 +716,6 @@ static void usbfs_remove_device(struct u fs_remove_file (dev->usbfs_dentry); dev->usbfs_dentry = NULL; } - usb_fs_classdev_common_remove(dev); } static int usbfs_notify(struct notifier_block *self, unsigned long action, void *dev) --- a/drivers/usb/core/usb.h +++ b/drivers/usb/core/usb.h @@ -145,7 +145,6 @@ extern struct usb_driver usbfs_driver; extern const struct file_operations usbfs_devices_fops; extern const struct file_operations usbdev_file_operations; extern void usbfs_conn_disc_event(void); -extern void usb_fs_classdev_common_remove(struct usb_device *udev); extern int usb_devio_init(void); extern void usb_devio_cleanup(void); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/