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	6 Jul 2005 19:22:42 -0000
@@ -269,7 +269,9 @@
 
 	spin_unlock_irqrestore(&channel->lock, flags);
 
-	if (unlikely(urb->status))
+	if (unlikely(urb->status) && 
+			(!(channel->usbatm->driver->options & IGNORE_ELISEQ) ||
+			  urb->status != -EILSEQ ))
 		/* throttle processing in case of an error */
 		mod_timer(&channel->delay, jiffies + msecs_to_jiffies(THROTTLE_MSECS));
 	else
@@ -1017,7 +1019,10 @@
 	usbatm_init_channel(&instance->tx_channel);
 	tasklet_init(&instance->rx_channel.tasklet, usbatm_rx_process, (unsigned long)instance);
 	tasklet_init(&instance->tx_channel.tasklet, usbatm_tx_process, (unsigned long)instance);
-	instance->rx_channel.endpoint = usb_rcvbulkpipe(usb_dev, driver->in);
+	if (driver->options & USE_ISO)
+		instance->rx_channel.endpoint = usb_rcvisocpipe(usb_dev, driver->in);
+	else
+		instance->rx_channel.endpoint = usb_rcvbulkpipe(usb_dev, driver->in);
 	instance->tx_channel.endpoint = usb_sndbulkpipe(usb_dev, driver->out);
 	instance->rx_channel.stride = ATM_CELL_SIZE + driver->rx_padding;
 	instance->tx_channel.stride = ATM_CELL_SIZE + driver->tx_padding;
@@ -1039,7 +1044,15 @@
 			iso_size = usb_maxpacket(instance->usb_dev, channel->endpoint, 0);
 			iso_size -= iso_size % channel->stride;	/* alignment */
 			BUG_ON(!iso_size);
-			iso_packets = (channel->buf_size - 1) / iso_size + 1;
+			if (driver->options & ISO_PACKET_MAX_SIZE) {
+				/* Some modem have problem when packet size is
+				 * not maxpacket size.
+				 */
+				iso_packets = channel->buf_size / iso_size;
+				channel->buf_size = iso_packets * iso_size;
+			}
+			else 
+				iso_packets = (channel->buf_size - 1) / iso_size + 1;
 		}
 
 		urb = usb_alloc_urb(iso_packets, GFP_KERNEL);
Index: usbatm.h
===================================================================
RCS file: /home/cvs/usbatm/usbatm.h,v
retrieving revision 1.19
diff -u -r1.19 usbatm.h
--- usbatm.h	30 May 2005 08:48:13 -0000	1.19
+++ usbatm.h	6 Jul 2005 19:22:42 -0000
@@ -79,6 +79,11 @@
 	do {} while (0)
 #endif
 
+/* options */
+#define USE_ISO			0x01 /* use iso pipe for rx data */
+#define IGNORE_ELISEQ		0x02 /* ignore ELISEQ errors */
+#define ISO_PACKET_MAX_SIZE	0x04 /* don't try to use iso packets that
+					have a size != max_packet_size */
 
 /* mini driver */
 
@@ -119,6 +124,7 @@
 
 	unsigned rx_padding;
 	unsigned tx_padding;
+	unsigned int options;
 };
 
 extern int usbatm_usb_probe(struct usb_interface *intf, const struct usb_device_id *id,