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>

1 files changed, 18 insertions, 3 deletions

diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c
index 3dd7da9fd50..58f56775ecd 100644
--- 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)