X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fscsi%2Faacraid%2Fcomminit.c;h=d3ca7a37e489d813bbca069727614f44c0fbbeb7;hb=9bf4aaab3e101692164d49b7ca357651eb691cb6;hp=beb561fa0540280aab2e7fdfb39f9f5388d7b659;hpb=db216c3d5e4c040e557a50f8f5d35d5c415e8c1c;p=linux-2.6.git

diff --git a/drivers/scsi/aacraid/comminit.c b/drivers/scsi/aacraid/comminit.c
index beb561fa0..d3ca7a37e 100644
--- a/drivers/scsi/aacraid/comminit.c
+++ b/drivers/scsi/aacraid/comminit.c
@@ -95,13 +95,18 @@ static int aac_alloc_comm(struct aac_dev *dev, void **commaddr, unsigned long co
 	 * with the math overloading past 32 bits, thus we must limit this
 	 * field.
 	 *
-	 * FIXME: this assumes the memory is mapped zero->n, which isnt
-	 * always true on real computers.
+	 * This assumes the memory is mapped zero->n, which isnt
+	 * always true on real computers. It also has some slight problems
+	 * with the GART on x86-64. I've btw never tried DMA from PCI space
+	 * on this platform but don't be suprised if its problematic.
 	 */
+#ifndef CONFIG_GART_IOMMU
 	if ((num_physpages << (PAGE_SHIFT - 12)) <= AAC_MAX_HOSTPHYSMEMPAGES) {
 		init->HostPhysMemPages = 
 			cpu_to_le32(num_physpages << (PAGE_SHIFT-12));
-	} else {
+	} else 
+#endif	
+	{
 		init->HostPhysMemPages = cpu_to_le32(AAC_MAX_HOSTPHYSMEMPAGES);
 	}