[PATCH] page limit on bulk transfers in usbfs?

Here is an updated patch using kmalloc that removes the page limit
on bulk transfers in usbfs.  I've tested it and it seems to work OK.

drivers/usb/core/devio.c

@@ -597,33 +597,31 @@ static int proc_bulk(struct dev_state *ps, void *arg)
 	if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
 		return -EINVAL;
 	len1 = bulk.len;
-	if (len1 > PAGE_SIZE)
-		return -EINVAL;
-	if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
+	if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
 		return -ENOMEM;
 	tmo = (bulk.timeout * HZ + 999) / 1000;
 	if (bulk.ep & 0x80) {
 		if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
-			free_page((unsigned long)tbuf);
+			kfree(tbuf);
 			return -EINVAL;
 		}
 		i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
 		if (!i && len2) {
 			if (copy_to_user(bulk.data, tbuf, len2)) {
-				free_page((unsigned long)tbuf);
+				kfree(tbuf);
 				return -EFAULT;
 			}
 		}
 	} else {
 		if (len1) {
 			if (copy_from_user(tbuf, bulk.data, len1)) {
-				free_page((unsigned long)tbuf);
+				kfree(tbuf);
 				return -EFAULT;
 			}
 		}
 		i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
 	}
-	free_page((unsigned long)tbuf);
+	kfree(tbuf);
 	if (i < 0) {
 		printk(KERN_WARNING "usbfs: USBDEVFS_BULK failed dev %d ep 0x%x len %u ret %d\n", 
 		       dev->devnum, bulk.ep, bulk.len, i);