Index: usbatm.c
===================================================================
RCS file: /home/cvs/usbatm/usbatm.c,v
retrieving revision 1.47
diff -u -r1.47 usbatm.c
--- usbatm.c	27 May 2005 16:17:23 -0000	1.47
+++ usbatm.c	28 Jun 2005 07:24:28 -0000
@@ -1039,7 +1039,15 @@
 			iso_size = usb_maxpacket(instance->usb_dev, channel->endpoint, 0);
 			iso_size -= iso_size % channel->stride;	/* alignment */
 			BUG_ON(!iso_size);
+#if 0
 			iso_packets = (channel->buf_size - 1) / iso_size + 1;
+#else
+			/* Some modem have problem when the last packet have
+			 * a smaller size.
+			 */
+			iso_packets = channel->buf_size / iso_size;
+			channel->buf_size = iso_packets * iso_size;
+#endif
 		}
 
 		urb = usb_alloc_urb(iso_packets, GFP_KERNEL);