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authorSonic Zhang <sonic.zhang@analog.com>2009-12-16 07:52:52 +0000
committerMike Frysinger <vapier@gentoo.org>2010-03-09 00:30:46 -0500
commita3a6a590190ca77aedf9de871d941c1139a5a24c (patch)
tree3fbc9066b9e1ce9de3b4f73b81467ec2f48d3262 /arch
parent0c270807db7c6478d60ab2bc23511fd5868a7a80 (diff)
Blackfin: dma-mapping: fix thinko in constant optimization
Make sure the non-constant version of the dma_sync functions actually complete instead of recursively calling itself forever. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/blackfin/include/asm/dma-mapping.h15
-rw-r--r--arch/blackfin/kernel/dma-mapping.c2
2 files changed, 10 insertions, 7 deletions
diff --git a/arch/blackfin/include/asm/dma-mapping.h b/arch/blackfin/include/asm/dma-mapping.h
index f9172ff30e5c..e63f6d9fdab8 100644
--- a/arch/blackfin/include/asm/dma-mapping.h
+++ b/arch/blackfin/include/asm/dma-mapping.h
@@ -44,13 +44,8 @@ dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
extern void
__dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir);
static inline void
-_dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir)
+__dma_sync_inline(dma_addr_t addr, size_t size, enum dma_data_direction dir)
{
- if (!__builtin_constant_p(dir)) {
- __dma_sync(addr, size, dir);
- return;
- }
-
switch (dir) {
case DMA_NONE:
BUG();
@@ -64,6 +59,14 @@ _dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir)
break;
}
}
+static inline void
+_dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir)
+{
+ if (__builtin_constant_p(dir))
+ __dma_sync_inline(addr, size, dir);
+ else
+ __dma_sync(addr, size, dir);
+}
/*
* Map a single buffer of the indicated size for DMA in streaming mode.
diff --git a/arch/blackfin/kernel/dma-mapping.c b/arch/blackfin/kernel/dma-mapping.c
index e937f323d82c..04ddcfeb7981 100644
--- a/arch/blackfin/kernel/dma-mapping.c
+++ b/arch/blackfin/kernel/dma-mapping.c
@@ -116,7 +116,7 @@ EXPORT_SYMBOL(dma_free_coherent);
void __dma_sync(dma_addr_t addr, size_t size,
enum dma_data_direction dir)
{
- _dma_sync(addr, size, dir);
+ __dma_sync_inline(addr, size, dir);
}
EXPORT_SYMBOL(__dma_sync);