*** /usr/src/linux-source-2.6.12/drivers/usb/class/cdc-acm.c.orig	2005-12-06 18:18:06.000000000 -0700
--- /usr/src/linux-source-2.6.12/drivers/usb/class/cdc-acm.c	2005-12-06 18:19:45.000000000 -0700
***************
*** 73,78 ****
--- 73,79 ----
  #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik"
  #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
  
+ static ushort maxszc = 0, maxszw = 0, maxszr = 0;
  static struct usb_driver acm_driver;
  static struct tty_driver *acm_tty_driver;
  static struct acm *acm_table[ACM_TTY_MINORS];
***************
*** 686,694 ****
  	}
  	memset(acm, 0, sizeof(struct acm));
  
! 	ctrlsize = le16_to_cpu(epctrl->wMaxPacketSize);
! 	readsize = le16_to_cpu(epread->wMaxPacketSize);
! 	acm->writesize = le16_to_cpu(epwrite->wMaxPacketSize);
  	acm->control = control_interface;
  	acm->data = data_interface;
  	acm->minor = minor;
--- 687,698 ----
  	}
  	memset(acm, 0, sizeof(struct acm));
  
! 	//ctrlsize = le16_to_cpu(epctrl->wMaxPacketSize);
! 	//readsize = le16_to_cpu(epread->wMaxPacketSize);
! 	//acm->writesize = le16_to_cpu(epwrite->wMaxPacketSize);
! 	ctrlsize = (le16_to_cpu(epctrl->wMaxPacketSize) > maxszc)?le16_to_cpu(epctrl->wMaxPacketSize):maxszc;
! 	readsize = (le16_to_cpu(epread->wMaxPacketSize) > maxszr)?le16_to_cpu(epread->wMaxPacketSize):maxszr;
! 	acm->writesize = (le16_to_cpu(epwrite->wMaxPacketSize) > maxszw)?le16_to_cpu(epwrite->wMaxPacketSize):maxszw;
  	acm->control = control_interface;
  	acm->data = data_interface;
  	acm->minor = minor;
***************
*** 940,942 ****
--- 944,952 ----
  MODULE_DESCRIPTION( DRIVER_DESC );
  MODULE_LICENSE("GPL");
  
+ module_param(maxszc, ushort,0);
+ MODULE_PARM_DESC(maxszc,"User specified USB endpoint control size");
+ module_param(maxszr, ushort,0);
+ MODULE_PARM_DESC(maxszr,"User specified USB endpoint read size");
+ module_param(maxszw, ushort,0);
+ MODULE_PARM_DESC(maxszw,"User specified USB endpoint write size");