USB: keep track of whether interface sysfs files exist
This patch (as1009) solves the problem of multiple registrations for
USB sysfs files in a more satisfying way than the existing code. It
simply adds a flag to keep track of whether or not the files have been
created; that way the files can be created or removed as needed.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
diff --git a/include/linux/usb.h b/include/linux/usb.h
index c5c8f16..416ee76 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -157,6 +157,7 @@
* bound to */
enum usb_interface_condition condition; /* state of binding */
unsigned is_active:1; /* the interface is not suspended */
+ unsigned sysfs_files_created:1; /* the sysfs attributes exist */
unsigned needs_remote_wakeup:1; /* driver requires remote wakeup */
struct device dev; /* interface specific device info */