USB: fix usbled disconnect read race #2
usbled has a race where show methods for attributes in sysfs can
follow a NULL pointer during disconnect. The correct ordering fixes
it.
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/misc/usbled.c b/drivers/usb/misc/usbled.c
index 49c5c5c..06cb719 100644
--- a/drivers/usb/misc/usbled.c
+++ b/drivers/usb/misc/usbled.c
@@ -144,12 +144,14 @@
struct usb_led *dev;
dev = usb_get_intfdata (interface);
- usb_set_intfdata (interface, NULL);
device_remove_file(&interface->dev, &dev_attr_blue);
device_remove_file(&interface->dev, &dev_attr_red);
device_remove_file(&interface->dev, &dev_attr_green);
+ /* first remove the files, then set the pointer to NULL */
+ usb_set_intfdata (interface, NULL);
+
usb_put_dev(dev->udev);
kfree(dev);