x86: dma-ops on highmem fix

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 7 insertions, 8 deletions

diff --git a/arch/x86/kernel/pci-gart_64.c b/arch/x86/kernel/pci-gart_64.c
index 700e4647dd30..c07455d1695f 100644
--- a/arch/x86/kernel/pci-gart_64.c
+++ b/arch/x86/kernel/pci-gart_64.c
@@ -264,9 +264,9 @@ static dma_addr_t dma_map_area(struct device *dev, dma_addr_t phys_mem,
 }
 
 static dma_addr_t
-gart_map_simple(struct device *dev, char *buf, size_t size, int dir)
+gart_map_simple(struct device *dev, phys_addr_t paddr, size_t size, int dir)
 {
-        dma_addr_t map = dma_map_area(dev, virt_to_bus(buf), size, dir);
+        dma_addr_t map = dma_map_area(dev, paddr, size, dir);
 
         flush_gart();
 
@@ -275,18 +275,17 @@ gart_map_simple(struct device *dev, char *buf, size_t size, int dir)
 
 /* Map a single area into the IOMMU */
 static dma_addr_t
-gart_map_single(struct device *dev, void *addr, size_t size, int dir)
+gart_map_single(struct device *dev, phys_addr_t paddr, size_t size, int dir)
 {
-        unsigned long phys_mem, bus;
+        unsigned long bus;
 
         if (!dev)
                 dev = &fallback_dev;
 
-        phys_mem = virt_to_phys(addr);
-        if (!need_iommu(dev, phys_mem, size))
-                return phys_mem;
+        if (!need_iommu(dev, paddr, size))
+                return paddr;
 
-        bus = gart_map_simple(dev, addr, size, dir);
+        bus = gart_map_simple(dev, paddr, size, dir);
 
         return bus;
 }