[PATCH] SATAPI despite no data

I see we lost this source line in the changes since 2.6.7.  But if I try
SATAPI expecting no data without this source line, then my ata_piix.ko
promptly dies with such complaints as:

kernel: irq 18: nobody cared!

With this source line, I find I can expect no data, though I still have
to add auto sense to overcome:

kernel: ata2: BUG: timeout without command

drivers/scsi/libata-core.c

@@ -2578,6 +2578,7 @@ inline unsigned int ata_host_intr (struct ata_port *ap,
 
 	case ATA_PROT_DMA:
 	case ATA_PROT_ATAPI_DMA:
+	case ATA_PROT_ATAPI:
 		/* check status of DMA engine */
 		host_stat = ata_bmdma_status(ap);
 		VPRINTK("BUS_DMA (host_stat 0x%X)\n", host_stat);