Merge remote-tracking branches 'asoc/fix/arizona', 'asoc/fix/cs35l32', 'asoc/fix...

[cascardo/linux.git] / include / linux / dma-mapping.h

diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 75857cd..9ea9aba 100644 (file)
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -70,6 +70,8 @@ struct dma_map_ops {
        int is_phys;
 };
 
+extern struct dma_map_ops dma_noop_ops;
+
 #define DMA_BIT_MASK(n)        (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
 
 #define DMA_MASK_NONE  0x0ULL
@@ -386,7 +388,7 @@ static inline void dma_free_attrs(struct device *dev, size_t size,
        if (dma_release_from_coherent(dev, get_order(size), cpu_addr))
                return;
 
-       if (!ops->free)
+       if (!ops->free || !cpu_addr)
                return;
 
        debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
@@ -641,31 +643,40 @@ static inline void dmam_release_declared_memory(struct device *dev)
 }
 #endif /* CONFIG_HAVE_GENERIC_DMA_COHERENT */
 
-static inline void *dma_alloc_writecombine(struct device *dev, size_t size,
-                                          dma_addr_t *dma_addr, gfp_t gfp)
+static inline void *dma_alloc_wc(struct device *dev, size_t size,
+                                dma_addr_t *dma_addr, gfp_t gfp)
 {
        DEFINE_DMA_ATTRS(attrs);
        dma_set_attr(DMA_ATTR_WRITE_COMBINE, &attrs);
        return dma_alloc_attrs(dev, size, dma_addr, gfp, &attrs);
 }
+#ifndef dma_alloc_writecombine
+#define dma_alloc_writecombine dma_alloc_wc
+#endif
 
-static inline void dma_free_writecombine(struct device *dev, size_t size,
-                                        void *cpu_addr, dma_addr_t dma_addr)
+static inline void dma_free_wc(struct device *dev, size_t size,
+                              void *cpu_addr, dma_addr_t dma_addr)
 {
        DEFINE_DMA_ATTRS(attrs);
        dma_set_attr(DMA_ATTR_WRITE_COMBINE, &attrs);
        return dma_free_attrs(dev, size, cpu_addr, dma_addr, &attrs);
 }
+#ifndef dma_free_writecombine
+#define dma_free_writecombine dma_free_wc
+#endif
 
-static inline int dma_mmap_writecombine(struct device *dev,
-                                       struct vm_area_struct *vma,
-                                       void *cpu_addr, dma_addr_t dma_addr,
-                                       size_t size)
+static inline int dma_mmap_wc(struct device *dev,
+                             struct vm_area_struct *vma,
+                             void *cpu_addr, dma_addr_t dma_addr,
+                             size_t size)
 {
        DEFINE_DMA_ATTRS(attrs);
        dma_set_attr(DMA_ATTR_WRITE_COMBINE, &attrs);
        return dma_mmap_attrs(dev, vma, cpu_addr, dma_addr, size, &attrs);
 }
+#ifndef dma_mmap_writecombine
+#define dma_mmap_writecombine dma_mmap_wc
+#endif
 
 #ifdef CONFIG_NEED_DMA_MAP_STATE
 #define DEFINE_DMA_UNMAP_ADDR(ADDR_NAME)        dma_addr_t ADDR_NAME