Merge to Fedora kernel-2.6.18-1.2224_FC5 patched with stable patch-2.6.18.1-vs2.0...

[linux-2.6.git] / include / asm-x86_64 / dma-mapping.h

diff --git a/include/asm-x86_64/dma-mapping.h b/include/asm-x86_64/dma-mapping.h
index 49a81a6..b6da83d 100644 (file)
--- a/include/asm-x86_64/dma-mapping.h
+++ b/include/asm-x86_64/dma-mapping.h
@@ -6,7 +6,6 @@
  * documentation.
  */
 
-#include <linux/config.h>
 
 #include <asm/scatterlist.h>
 #include <asm/io.h>
@@ -56,6 +55,13 @@ extern dma_addr_t bad_dma_address;
 extern struct dma_mapping_ops* dma_ops;
 extern int iommu_merge;
 
+static inline int valid_dma_direction(int dma_direction)
+{
+       return ((dma_direction == DMA_BIDIRECTIONAL) ||
+               (dma_direction == DMA_TO_DEVICE) ||
+               (dma_direction == DMA_FROM_DEVICE));
+}
+
 static inline int dma_mapping_error(dma_addr_t dma_addr)
 {
        if (dma_ops->mapping_error)
@@ -73,6 +79,7 @@ static inline dma_addr_t
 dma_map_single(struct device *hwdev, void *ptr, size_t size,
               int direction)
 {
+       BUG_ON(!valid_dma_direction(direction));
        return dma_ops->map_single(hwdev, ptr, size, direction);
 }
 
@@ -80,6 +87,7 @@ static inline void
 dma_unmap_single(struct device *dev, dma_addr_t addr,size_t size,
                 int direction)
 {
+       BUG_ON(!valid_dma_direction(direction));
        dma_ops->unmap_single(dev, addr, size, direction);
 }
 
@@ -92,6 +100,7 @@ static inline void
 dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
                        size_t size, int direction)
 {
+       BUG_ON(!valid_dma_direction(direction));
        if (dma_ops->sync_single_for_cpu)
                dma_ops->sync_single_for_cpu(hwdev, dma_handle, size,
                                             direction);
@@ -102,6 +111,7 @@ static inline void
 dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle,
                           size_t size, int direction)
 {
+       BUG_ON(!valid_dma_direction(direction));
        if (dma_ops->sync_single_for_device)
                dma_ops->sync_single_for_device(hwdev, dma_handle, size,
                                                direction);
@@ -112,6 +122,7 @@ static inline void
 dma_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
                              unsigned long offset, size_t size, int direction)
 {
+       BUG_ON(!valid_dma_direction(direction));
        if (dma_ops->sync_single_range_for_cpu) {
                dma_ops->sync_single_range_for_cpu(hwdev, dma_handle, offset, size, direction);
        }
@@ -123,6 +134,7 @@ static inline void
 dma_sync_single_range_for_device(struct device *hwdev, dma_addr_t dma_handle,
                                 unsigned long offset, size_t size, int direction)
 {
+       BUG_ON(!valid_dma_direction(direction));
        if (dma_ops->sync_single_range_for_device)
                dma_ops->sync_single_range_for_device(hwdev, dma_handle,
                                                      offset, size, direction);
@@ -134,6 +146,7 @@ static inline void
 dma_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
                    int nelems, int direction)
 {
+       BUG_ON(!valid_dma_direction(direction));
        if (dma_ops->sync_sg_for_cpu)
                dma_ops->sync_sg_for_cpu(hwdev, sg, nelems, direction);
        flush_write_buffers();
@@ -143,6 +156,7 @@ static inline void
 dma_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
                       int nelems, int direction)
 {
+       BUG_ON(!valid_dma_direction(direction));
        if (dma_ops->sync_sg_for_device) {
                dma_ops->sync_sg_for_device(hwdev, sg, nelems, direction);
        }
@@ -153,6 +167,7 @@ dma_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
 static inline int
 dma_map_sg(struct device *hwdev, struct scatterlist *sg, int nents, int direction)
 {
+       BUG_ON(!valid_dma_direction(direction));
        return dma_ops->map_sg(hwdev, sg, nents, direction);
 }
 
@@ -160,6 +175,7 @@ static inline void
 dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
             int direction)
 {
+       BUG_ON(!valid_dma_direction(direction));
        dma_ops->unmap_sg(hwdev, sg, nents, direction);
 }