--- linux-2.6.14/arch/ppc/kernel/dma-mapping.c.orig	2005-10-06 15:50:46.000000000 -0700
+++ linux-2.6.14/arch/ppc/kernel/dma-mapping.c	2005-10-06 15:51:40.000000000 -0700
@@ -401,10 +401,10 @@
 static inline void __dma_sync_page_highmem(struct page *page,
 		unsigned long offset, size_t size, int direction)
 {
-	size_t seg_size = min((size_t)PAGE_SIZE, size) - offset;
+	size_t seg_size = min((size_t)(PAGE_SIZE - offset), size);
 	size_t cur_size = seg_size;
 	unsigned long flags, start, seg_offset = offset;
-	int nr_segs = PAGE_ALIGN(size + (PAGE_SIZE - offset))/PAGE_SIZE;
+	1 + ((size - seg_size) + PAGE_SIZE - 1)/PAGE_SIZE;
 	int seg_nr = 0;
 
 	local_irq_save(flags);