powerpc: Fix DMA offset for non-coherent DMA
After Becky's work we can almost have different DMA offsets
between on-chip devices and PCI. Almost because there's a
problem with the non-coherent DMA code that basically ignores
the programmed offset to use the global one for everything.
This fixes it.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/kernel/dma.c b/arch/powerpc/kernel/dma.c
index 41fdd48..1562daf 100644
--- a/arch/powerpc/kernel/dma.c
+++ b/arch/powerpc/kernel/dma.c
@@ -30,11 +30,15 @@
void *dma_direct_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag)
{
+ void *ret;
#ifdef CONFIG_NOT_COHERENT_CACHE
- return __dma_alloc_coherent(size, dma_handle, flag);
+ ret = __dma_alloc_coherent(size, dma_handle, flag);
+ if (ret == NULL)
+ return NULL;
+ *dma_handle += get_dma_direct_offset(dev);
+ return ret;
#else
struct page *page;
- void *ret;
int node = dev_to_node(dev);
/* ignore region specifiers */
diff --git a/arch/powerpc/lib/dma-noncoherent.c b/arch/powerpc/lib/dma-noncoherent.c
index 5d83907..31734c0 100644
--- a/arch/powerpc/lib/dma-noncoherent.c
+++ b/arch/powerpc/lib/dma-noncoherent.c
@@ -203,7 +203,7 @@
/*
* Set the "dma handle"
*/
- *handle = page_to_bus(page);
+ *handle = page_to_phys(page);
do {
BUG_ON(!pte_none(*pte));