X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=arch%2Fpowerpc%2Fkernel%2Fdma_64.c;h=6c168f6ea1428963150aa28a85739c6ca9352340;hb=d04c56f73c30a5e593202ecfcf25ed43d42363a2;hp=7c3419656ccce2f96fe98cd7a5362f6ab6bd671b;hpb=77ed78e5cf32be1c3fae5c477cc1d78e2e3f17db;p=linux-2.6

diff --git a/arch/powerpc/kernel/dma_64.c b/arch/powerpc/kernel/dma_64.c
index 7c3419656c..6c168f6ea1 100644
--- a/arch/powerpc/kernel/dma_64.c
+++ b/arch/powerpc/kernel/dma_64.c
@@ -10,6 +10,7 @@
 /* Include the busses we support */
 #include <linux/pci.h>
 #include <asm/vio.h>
+#include <asm/ibmebus.h>
 #include <asm/scatterlist.h>
 #include <asm/bug.h>
 
@@ -22,6 +23,10 @@ static struct dma_mapping_ops *get_dma_ops(struct device *dev)
 #ifdef CONFIG_IBMVIO
 	if (dev->bus == &vio_bus_type)
 		return &vio_dma_ops;
+#endif
+#ifdef CONFIG_IBMEBUS
+	if (dev->bus == &ibmebus_bus_type)
+		return &ibmebus_dma_ops;
 #endif
 	return NULL;
 }
@@ -30,10 +35,9 @@ int dma_supported(struct device *dev, u64 mask)
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
 
-	if (dma_ops)
-		return dma_ops->dma_supported(dev, mask);
-	BUG();
-	return 0;
+	BUG_ON(!dma_ops);
+
+	return dma_ops->dma_supported(dev, mask);
 }
 EXPORT_SYMBOL(dma_supported);
 
@@ -47,6 +51,10 @@ int dma_set_mask(struct device *dev, u64 dma_mask)
 	if (dev->bus == &vio_bus_type)
 		return -EIO;
 #endif /* CONFIG_IBMVIO */
+#ifdef CONFIG_IBMEBUS
+	if (dev->bus == &ibmebus_bus_type)
+		return -EIO;
+#endif
 	BUG();
 	return 0;
 }
@@ -57,10 +65,9 @@ void *dma_alloc_coherent(struct device *dev, size_t size,
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
 
-	if (dma_ops)
-		return dma_ops->alloc_coherent(dev, size, dma_handle, flag);
-	BUG();
-	return NULL;
+	BUG_ON(!dma_ops);
+
+	return dma_ops->alloc_coherent(dev, size, dma_handle, flag);
 }
 EXPORT_SYMBOL(dma_alloc_coherent);
 
@@ -69,10 +76,9 @@ void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
 
-	if (dma_ops)
-		dma_ops->free_coherent(dev, size, cpu_addr, dma_handle);
-	else
-		BUG();
+	BUG_ON(!dma_ops);
+
+	dma_ops->free_coherent(dev, size, cpu_addr, dma_handle);
 }
 EXPORT_SYMBOL(dma_free_coherent);
 
@@ -81,10 +87,9 @@ dma_addr_t dma_map_single(struct device *dev, void *cpu_addr, size_t size,
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
 
-	if (dma_ops)
-		return dma_ops->map_single(dev, cpu_addr, size, direction);
-	BUG();
-	return (dma_addr_t)0;
+	BUG_ON(!dma_ops);
+
+	return dma_ops->map_single(dev, cpu_addr, size, direction);
 }
 EXPORT_SYMBOL(dma_map_single);
 
@@ -93,10 +98,9 @@ void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
 
-	if (dma_ops)
-		dma_ops->unmap_single(dev, dma_addr, size, direction);
-	else
-		BUG();
+	BUG_ON(!dma_ops);
+
+	dma_ops->unmap_single(dev, dma_addr, size, direction);
 }
 EXPORT_SYMBOL(dma_unmap_single);
 
@@ -106,11 +110,10 @@ dma_addr_t dma_map_page(struct device *dev, struct page *page,
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
 
-	if (dma_ops)
-		return dma_ops->map_single(dev,
-				(page_address(page) + offset), size, direction);
-	BUG();
-	return (dma_addr_t)0;
+	BUG_ON(!dma_ops);
+
+	return dma_ops->map_single(dev, page_address(page) + offset, size,
+			direction);
 }
 EXPORT_SYMBOL(dma_map_page);
 
@@ -119,10 +122,9 @@ void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
 
-	if (dma_ops)
-		dma_ops->unmap_single(dev, dma_address, size, direction);
-	else
-		BUG();
+	BUG_ON(!dma_ops);
+
+	dma_ops->unmap_single(dev, dma_address, size, direction);
 }
 EXPORT_SYMBOL(dma_unmap_page);
 
@@ -131,10 +133,9 @@ int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
 
-	if (dma_ops)
-		return dma_ops->map_sg(dev, sg, nents, direction);
-	BUG();
-	return 0;
+	BUG_ON(!dma_ops);
+
+	return dma_ops->map_sg(dev, sg, nents, direction);
 }
 EXPORT_SYMBOL(dma_map_sg);
 
@@ -143,9 +144,8 @@ void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
 
-	if (dma_ops)
-		dma_ops->unmap_sg(dev, sg, nhwentries, direction);
-	else
-		BUG();
+	BUG_ON(!dma_ops);
+
+	dma_ops->unmap_sg(dev, sg, nhwentries, direction);
 }
 EXPORT_SYMBOL(dma_unmap_sg);