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x86: remove virt_to_bus in pci-dma_64.c

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virt_to_bus() is deprecated according to the docs, and moreover,
won't return the right thing in i386 if we're dealing with high memory mappings.
So we make our allocation function return a page, and then use page_address() (for
virtual addr) and page_to_phys() (for physical addr) instead.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Glauber Costa 2008-04-08 13:21:01 -03:00 committed by Ingo Molnar
parent 2e33e36118
commit 71848d687e
1 changed files with 7 additions and 7 deletions
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14
arch/x86/kernel/pci-dma_64.c
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@ -28,13 +28,11 @@ struct device fallback_dev = {
noinline static void *
dma_alloc_pages(struct device *dev, gfp_t gfp, unsigned order)
{
struct page *page;
int node;
node = dev_to_node(dev);
page = alloc_pages_node(node, gfp, order);
return page ? page_address(page) : NULL;
return alloc_pages_node(node, gfp, order);
}
#define dma_alloc_from_coherent_mem(dev, size, handle, ret) (0)
@ -47,6 +45,7 @@ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
gfp_t gfp)
{
void *memory;
struct page *page;
unsigned long dma_mask = 0;
u64 bus;
@ -79,13 +78,14 @@ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
gfp |= GFP_DMA32;
again:
memory = dma_alloc_pages(dev, gfp, get_order(size));
if (memory == NULL)
page = dma_alloc_pages(dev, gfp, get_order(size));
if (page == NULL)
return NULL;
{
int high, mmu;
bus = virt_to_bus(memory);
bus = page_to_phys(page);
memory = page_address(page);
high = (bus + size) >= dma_mask;
mmu = high;
if (force_iommu && !(gfp & GFP_DMA))
@ -112,7 +112,7 @@ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
memset(memory, 0, size);
if (!mmu) {
*dma_handle = virt_to_bus(memory);
*dma_handle = bus;
return memory;
}
}