--- include/linux/i2o.h	2006-09-22 12:07:29.286557446 +0200
+++ include/linux/i2o.h	2006-09-22 12:08:01.904303452 +0200
@@ -776,6 +776,8 @@
 #ifdef CONFIG_I2O_EXT_ADAPTEC_DMA64
 		if ((sizeof(dma_addr_t) > 4) && c->pae_support)
 			*mptr++ = cpu_to_le32(i2o_dma_high(dma_addr));
+#else
+		BUG_ON((u32) ((u64) dma_addr >> 32));
 #endif
 		*sg_ptr = mptr;
 	}
@@ -835,6 +837,8 @@
 #ifdef CONFIG_I2O_EXT_ADAPTEC_DMA64
 		if ((sizeof(dma_addr_t) > 4) && c->pae_support)
 			*mptr++ = cpu_to_le32(i2o_dma_high(sg_dma_address(sg)));
+#else
+		BUG_ON((u32) ((u64) sg_dma_address(sg) >> 32));
 #endif
 		sg++;
 	}