[PATCH] USB: add dynamic id functionality to USB core

Echo the usb vendor and product id to the "new_id" file in the driver's
sysfs directory, and then that driver will be able to bind to a device
with those ids if it is present.

Example:
	echo 0557 2008 > /sys/bus/usb/drivers/foo_driver/new_id
adds the hex values 0557 and 2008 to the device id table for the foo_driver.

Note, usb-serial drivers do not currently work with this capability yet.
usb-storage also might have some oddities.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/usb.h b/include/linux/usb.h
index d81b050..0dd96ef 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -529,6 +529,11 @@ static inline int usb_make_path (struct usb_device *dev, char *buf,
 
 /* ----------------------------------------------------------------------- */
 
+struct usb_dynids {
+	spinlock_t lock;
+	struct list_head list;
+};
+
 /**
  * struct usb_driver - identifies USB driver to usbcore
  * @owner: Pointer to the module owner of this driver; initialize
@@ -553,6 +558,8 @@ static inline int usb_make_path (struct usb_device *dev, char *buf,
  * @id_table: USB drivers use ID table to support hotplugging.
  *	Export this with MODULE_DEVICE_TABLE(usb,...).  This must be set
  *	or your driver's probe function will never get called.
+ * @dynids: used internally to hold the list of dynamically added device
+ *	ids for this driver.
  * @driver: the driver model core driver structure.
  *
  * USB drivers must provide a name, probe() and disconnect() methods,
@@ -588,6 +595,7 @@ struct usb_driver {
 
 	const struct usb_device_id *id_table;
 
+	struct usb_dynids dynids;
 	struct device_driver driver;
 };
 #define	to_usb_driver(d) container_of(d, struct usb_driver, driver)