[PATCH] Hack mptfusion to work on >4GB machines

fusion needs several separately allocated coherent regions and
requires that they all be in the same 4GB segment.  Obviously this may
fail.  The hack is to force the coherent_dma_mask to 0xffffffff thus
ensuring that all the allocations occur within the first 4GB.  This
hack breaks Altix entirely.

drivers/message/fusion/mptbase.c

@@ -1280,12 +1280,17 @@ mptbase_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		return r;
 	}
 
+#if 0
+	/* broken because some code assumes that multiple calls
+	   to pci_alloc_consistent return data in the same 4GB segment. 
+	   This cannot work on machines with enough memory. */
 	if (!pci_set_consistent_dma_mask(pdev, mask))
 		dprintk((KERN_INFO MYNAM
 			": Using 64 bit consistent mask\n"));
 	else
 		dprintk((KERN_INFO MYNAM
 			": Not using 64 bit consistent mask\n"));
+#endif
 
 	ioc = kmalloc(sizeof(MPT_ADAPTER), GFP_ATOMIC);
 	if (ioc == NULL) {