usb: Re-enable usb-storage support dynamic id

Enable usb-storage support dynamic id again by using a fixed id entry
that describes a device using the Bulk-Only transport with the
Transparent SCSI protocol.

Signed-off-by: Huajun Li <huajun.li.lee@gmail.com>
Reviewed-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c
index 3dd7da9fd5043cad98a00e552ba8c11ebe9ff581..58f56775ecde5910862aab47a76846d9c86cebcd 100644 (file)
--- a/drivers/usb/storage/usb.c
+++ b/drivers/usb/storage/usb.c
@@ -125,6 +125,9 @@ static struct us_unusual_dev us_unusual_dev_list[] = {
        { }             /* Terminating entry */
 };
 
+static struct us_unusual_dev for_dynamic_ids =
+               USUAL_DEV(USB_SC_SCSI, USB_PR_BULK, 0);
+
 #undef UNUSUAL_DEV
 #undef COMPLIANT_DEV
 #undef USUAL_DEV
@@ -1027,8 +1030,10 @@ EXPORT_SYMBOL_GPL(usb_stor_disconnect);
 static int storage_probe(struct usb_interface *intf,
                         const struct usb_device_id *id)
 {
+       struct us_unusual_dev *unusual_dev;
        struct us_data *us;
        int result;
+       int size;
 
        /*
         * If libusual is configured, let it decide whether a standard
@@ -1047,8 +1052,19 @@ static int storage_probe(struct usb_interface *intf,
         * table, so we use the index of the id entry to find the
         * corresponding unusual_devs entry.
         */
-       result = usb_stor_probe1(&us, intf, id,
-                       (id - usb_storage_usb_ids) + us_unusual_dev_list);
+
+       size = ARRAY_SIZE(us_unusual_dev_list);
+       if (id >= usb_storage_usb_ids && id < usb_storage_usb_ids + size) {
+               unusual_dev = (id - usb_storage_usb_ids) + us_unusual_dev_list;
+       } else {
+               unusual_dev = &for_dynamic_ids;
+
+               US_DEBUGP("%s %s 0x%04x 0x%04x\n", "Use Bulk-Only transport",
+                       "with the Transparent SCSI protocol for dynamic id:",
+                       id->idVendor, id->idProduct);
+       }
+
+       result = usb_stor_probe1(&us, intf, id, unusual_dev);
        if (result)
                return result;
 
@@ -1074,7 +1090,6 @@ static struct usb_driver usb_storage_driver = {
        .id_table =     usb_storage_usb_ids,
        .supports_autosuspend = 1,
        .soft_unbind =  1,
-       .no_dynamic_id = 1,
 };
 
 static int __init usb_stor_init(void)