[PATCH] Add struct dev pointer to dma_is_consistent()

dma_is_consistent() is ill-designed in that it does not have a struct
device pointer argument which makes proper support for systems that consist
of a mix of coherent and non-coherent DMA devices hard.  Change
dma_is_consistent to take a struct device pointer as first argument and fix
the sole caller to pass it.
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Documentation/DMA-API.txt

@@ -431,10 +431,10 @@ be identical to those passed in (and returned by
 dma_alloc_noncoherent()).
 
 int
-dma_is_consistent(dma_addr_t dma_handle)
+dma_is_consistent(struct device *dev, dma_addr_t dma_handle)
 
-returns true if the memory pointed to by the dma_handle is actually
-consistent.
+returns true if the device dev is performing consistent DMA on the memory
+area pointed to by the dma_handle.
 
 int
 dma_get_cache_alignment(void)

arch/mips/mm/dma-coherent.c

@@ -190,7 +190,7 @@ int dma_supported(struct device *dev, u64 mask)
 
 EXPORT_SYMBOL(dma_supported);
 
-int dma_is_consistent(dma_addr_t dma_addr)
+int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
 {
 	return 1;
 }

arch/mips/mm/dma-ip27.c

@@ -197,7 +197,7 @@ int dma_supported(struct device *dev, u64 mask)
 
 EXPORT_SYMBOL(dma_supported);
 
-int dma_is_consistent(dma_addr_t dma_addr)
+int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
 {
 	return 1;
 }

arch/mips/mm/dma-ip32.c

@@ -363,7 +363,7 @@ int dma_supported(struct device *dev, u64 mask)
 
 EXPORT_SYMBOL(dma_supported);
 
-int dma_is_consistent(dma_addr_t dma_addr)
+int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
 {
 	return 1;
 }

arch/mips/mm/dma-noncoherent.c

@@ -299,7 +299,7 @@ int dma_supported(struct device *dev, u64 mask)
 
 EXPORT_SYMBOL(dma_supported);
 
-int dma_is_consistent(dma_addr_t dma_addr)
+int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
 {
 	return 1;
 }

drivers/scsi/53c700.c

@@ -313,7 +313,7 @@ NCR_700_detect(struct scsi_host_template *tpnt,
 	hostdata->status = memory + STATUS_OFFSET;
 	/* all of these offsets are L1_CACHE_BYTES separated.  It is fatal
 	 * if this isn't sufficient separation to avoid dma flushing issues */
-	BUG_ON(!dma_is_consistent(pScript) && L1_CACHE_BYTES < dma_get_cache_alignment());
+	BUG_ON(!dma_is_consistent(hostdata->dev, pScript) && L1_CACHE_BYTES < dma_get_cache_alignment());
 	hostdata->slots = (struct NCR_700_command_slot *)(memory + SLOTS_OFFSET);
 	hostdata->dev = dev;
 

include/asm-alpha/dma-mapping.h

@@ -51,7 +51,7 @@ int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
 
 #define dma_alloc_noncoherent(d, s, h, f)	dma_alloc_coherent(d, s, h, f)
 #define dma_free_noncoherent(d, s, v, h)	dma_free_coherent(d, s, v, h)
-#define dma_is_consistent(dev)			(1)
+#define dma_is_consistent(d, h)			(1)
 
 int dma_set_mask(struct device *dev, u64 mask);
 

include/asm-arm/dma-mapping.h

@@ -48,7 +48,7 @@ static inline int dma_get_cache_alignment(void)
 	return 32;
 }
 
-static inline int dma_is_consistent(dma_addr_t handle)
+static inline int dma_is_consistent(struct device *dev, dma_addr_t handle)
 {
 	return !!arch_is_coherent();
 }

include/asm-avr32/dma-mapping.h

@@ -307,7 +307,7 @@ dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
 
-static inline int dma_is_consistent(dma_addr_t dma_addr)
+static inline int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
 {
 	return 1;
 }

include/asm-cris/dma-mapping.h

@@ -156,7 +156,7 @@ dma_get_cache_alignment(void)
 	return (1 << INTERNODE_CACHE_SHIFT);
 }
 
-#define dma_is_consistent(d)	(1)
+#define dma_is_consistent(d, h)	(1)
 
 static inline void
 dma_cache_sync(void *vaddr, size_t size,

include/asm-frv/dma-mapping.h

@@ -172,7 +172,7 @@ int dma_get_cache_alignment(void)
 	return 1 << L1_CACHE_SHIFT;
 }
 
-#define dma_is_consistent(d)	(1)
+#define dma_is_consistent(d, h)	(1)
 
 static inline
 void dma_cache_sync(void *vaddr, size_t size,

include/asm-generic/dma-mapping.h

@@ -266,7 +266,7 @@ dma_error(dma_addr_t dma_addr)
 
 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
-#define dma_is_consistent(d)	(1)
+#define dma_is_consistent(d, h)	(1)
 
 static inline int
 dma_get_cache_alignment(void)

include/asm-i386/dma-mapping.h

@@ -156,7 +156,7 @@ dma_get_cache_alignment(void)
 	return (1 << INTERNODE_CACHE_SHIFT);
 }
 
-#define dma_is_consistent(d)	(1)
+#define dma_is_consistent(d, h)	(1)
 
 static inline void
 dma_cache_sync(void *vaddr, size_t size,

include/asm-ia64/dma-mapping.h

@@ -59,6 +59,6 @@ dma_cache_sync (void *vaddr, size_t size, enum dma_data_direction dir)
 	mb();
 }
 
-#define dma_is_consistent(dma_handle)	(1)	/* all we do is coherent memory... */
+#define dma_is_consistent(d, h)	(1)	/* all we do is coherent memory... */
 
 #endif /* _ASM_IA64_DMA_MAPPING_H */

include/asm-m68k/dma-mapping.h

@@ -21,7 +21,7 @@ static inline int dma_get_cache_alignment(void)
 	return 1 << L1_CACHE_SHIFT;
 }
 
-static inline int dma_is_consistent(dma_addr_t dma_addr)
+static inline int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
 {
 	return 0;
 }

include/asm-mips/dma-mapping.h

@@ -63,7 +63,7 @@ dma_get_cache_alignment(void)
 	return 128;
 }
 
-extern int dma_is_consistent(dma_addr_t dma_addr);
+extern int dma_is_consistent(struct device *dev, dma_addr_t dma_addr);
 
 extern void dma_cache_sync(void *vaddr, size_t size,
 	       enum dma_data_direction direction);

include/asm-parisc/dma-mapping.h

@@ -191,7 +191,7 @@ dma_get_cache_alignment(void)
 }
 
 static inline int
-dma_is_consistent(dma_addr_t dma_addr)
+dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
 {
 	return (hppa_dma_ops->dma_sync_single_for_cpu == NULL);
 }

include/asm-powerpc/dma-mapping.h

@@ -342,9 +342,9 @@ static inline int dma_mapping_error(dma_addr_t dma_addr)
 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
 #ifdef CONFIG_NOT_COHERENT_CACHE
-#define dma_is_consistent(d)	(0)
+#define dma_is_consistent(d, h)	(0)
 #else
-#define dma_is_consistent(d)	(1)
+#define dma_is_consistent(d, h)	(1)
 #endif
 
 static inline int dma_get_cache_alignment(void)

include/asm-sparc64/dma-mapping.h

@@ -181,7 +181,7 @@ dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t siz
 
 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
-#define dma_is_consistent(d)	(1)
+#define dma_is_consistent(d, h)	(1)
 
 static inline int
 dma_get_cache_alignment(void)

include/asm-um/dma-mapping.h

@@ -94,7 +94,7 @@ dma_sync_sg(struct device *dev, struct scatterlist *sg, int nelems,
 
 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
-#define dma_is_consistent(d) (1)
+#define dma_is_consistent(d, h) (1)
 
 static inline int
 dma_get_cache_alignment(void)

include/asm-x86_64/dma-mapping.h

@@ -180,7 +180,7 @@ static inline int dma_get_cache_alignment(void)
 	return boot_cpu_data.x86_clflush_size;
 }
 
-#define dma_is_consistent(h) 1
+#define dma_is_consistent(d, h) 1
 
 extern int dma_set_mask(struct device *dev, u64 mask);
 

include/asm-xtensa/dma-mapping.h

@@ -170,7 +170,7 @@ dma_get_cache_alignment(void)
 	return L1_CACHE_BYTES;
 }
 
-#define dma_is_consistent(d)	(1)
+#define dma_is_consistent(d, h)	(1)
 
 static inline void
 dma_cache_sync(void *vaddr, size_t size,