1 files changed, 34 insertions, 4 deletions

diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index f9fed34bf7d8..530e854961ce 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -404,8 +404,6 @@ int usb_sg_init (
 
 		io->urbs [i]->complete = sg_complete;
 		io->urbs [i]->context = io;
-		io->urbs [i]->status = -EINPROGRESS;
-		io->urbs [i]->actual_length = 0;
 
 		/*
 		 * Some systems need to revert to PIO when DMA is temporarily
@@ -499,7 +497,8 @@ void usb_sg_wait (struct usb_sg_request *io)
 
 	/* queue the urbs.  */
 	spin_lock_irq (&io->lock);
-	for (i = 0; i < entries && !io->status; i++) {
+	i = 0;
+	while (i < entries && !io->status) {
 		int	retval;
 
 		io->urbs [i]->dev = io->dev;
@@ -516,7 +515,6 @@ void usb_sg_wait (struct usb_sg_request *io)
 		case -ENOMEM:
 			io->urbs[i]->dev = NULL;
 			retval = 0;
-			i--;
 			yield ();
 			break;
 
@@ -527,6 +525,7 @@ void usb_sg_wait (struct usb_sg_request *io)
 			 * URBs are queued at once; N milliseconds?
 			 */
 		case 0:
+			++i;
 			cpu_relax ();
 			break;
 
@@ -1385,6 +1384,36 @@ struct device_type usb_if_device_type = {
 	.uevent =	usb_if_uevent,
 };
 
+static struct usb_interface_assoc_descriptor *find_iad(struct usb_device *dev,
+						       struct usb_host_config *config,
+						       u8 inum)
+{
+	struct usb_interface_assoc_descriptor *retval = NULL;
+	struct usb_interface_assoc_descriptor *intf_assoc;
+	int first_intf;
+	int last_intf;
+	int i;
+
+	for (i = 0; (i < USB_MAXIADS && config->intf_assoc[i]); i++) {
+		intf_assoc = config->intf_assoc[i];
+		if (intf_assoc->bInterfaceCount == 0)
+			continue;
+
+		first_intf = intf_assoc->bFirstInterface;
+		last_intf = first_intf + (intf_assoc->bInterfaceCount - 1);
+		if (inum >= first_intf && inum <= last_intf) {
+			if (!retval)
+				retval = intf_assoc;
+			else
+				dev_err(&dev->dev, "Interface #%d referenced"
+					" by multiple IADs\n", inum);
+		}
+	}
+
+	return retval;
+}
+
+
 /*
  * usb_set_configuration - Makes a particular device setting be current
  * @dev: the device whose configuration is being updated
@@ -1531,6 +1560,7 @@ free_interfaces:
 		intfc = cp->intf_cache[i];
 		intf->altsetting = intfc->altsetting;
 		intf->num_altsetting = intfc->num_altsetting;
+		intf->intf_assoc = find_iad(dev, cp, i);
 		kref_get(&intfc->ref);
 
 		alt = usb_altnum_to_altsetting(intf, 0);