pci_dma_sync_sg in 2.4 tree seems broken. pci_map_sg were fixed a
while ago. Please fix pci_dma_sync_sg also.
Here is a patch.
Index: pci.h
===================================================================
RCS file: /home/cvs/linux/include/asm-mips/pci.h,v
retrieving revision 1.24.2.16
diff -u -r1.24.2.16 pci.h
--- pci.h 17 Nov 2003 01:07:45 -0000 1.24.2.16
+++ pci.h 1 Jul 2004 13:10:48 -0000
@@ -270,20 +270,28 @@
*/
static inline void pci_dma_sync_sg(struct pci_dev *hwdev,
struct scatterlist *sg,
- int nelems, int direction)
+ int nents, int direction)
{
-#ifdef CONFIG_NONCOHERENT_IO
int i;
-#endif
if (direction == PCI_DMA_NONE)
out_of_line_bug();
- /* Make sure that gcc doesn't leave the empty loop body. */
-#ifdef CONFIG_NONCOHERENT_IO
- for (i = 0; i < nelems; i++, sg++)
- dma_cache_wback_inv((unsigned long)sg->address, sg->length);
-#endif
+ for (i = 0; i < nents; i++, sg++) {
+ if (sg->address && sg->page)
+ out_of_line_bug();
+ else if (!sg->address && !sg->page)
+ out_of_line_bug();
+
+ if (sg->address) {
+ dma_cache_wback_inv((unsigned long)sg->address,
+ sg->length);
+ } else {
+ dma_cache_wback_inv((unsigned long)
+ (page_address(sg->page) + sg->offset),
+ sg->length);
+ }
+ }
}
/*
---
Atsushi Nemoto
