diff -cr linux-source-2.6.38/drivers/ata/ahci.c linux-source-2.6.38_mvlpatch/drivers/ata/ahci.c
*** linux-source-2.6.38/drivers/ata/ahci.c	2011-04-10 23:31:19.000000000 -0400
--- linux-source-2.6.38_mvlpatch/drivers/ata/ahci.c	2011-05-04 23:49:35.744832072 -0400
***************
*** 388,393 ****
--- 388,395 ----
  	  .driver_data = board_ahci_yes_fbs },			/* 88se9125 */
  	{ PCI_DEVICE(0x1b4b, 0x91a3),
  	  .driver_data = board_ahci_yes_fbs },
+ 	{ PCI_DEVICE(0x1b4b, 0x91a4),		    /* on an HPT RR622 */
+ 	  .driver_data = board_ahci_yes_fbs },
  
  	/* Promise */
  	{ PCI_VDEVICE(PROMISE, 0x3f20), board_ahci },	/* PDC42819 */