usb devio: handle class_device_create() error
This patch adds missing class_device_create() error check,
and makes notifier return NOTIFY_BAD.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index 724822c..fed92be 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -1588,15 +1588,18 @@
.release = usbdev_release,
};
-static void usbdev_add(struct usb_device *dev)
+static int usbdev_add(struct usb_device *dev)
{
int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1);
dev->class_dev = class_device_create(usb_device_class, NULL,
MKDEV(USB_DEVICE_MAJOR, minor), &dev->dev,
"usbdev%d.%d", dev->bus->busnum, dev->devnum);
+ if (IS_ERR(dev->class_dev))
+ return PTR_ERR(dev->class_dev);
dev->class_dev->class_data = dev;
+ return 0;
}
static void usbdev_remove(struct usb_device *dev)
@@ -1609,7 +1612,8 @@
{
switch (action) {
case USB_DEVICE_ADD:
- usbdev_add(dev);
+ if (usbdev_add(dev))
+ return NOTIFY_BAD;
break;
case USB_DEVICE_REMOVE:
usbdev_remove(dev);