diff options
| author | Sonic Zhang <sonic.zhang@analog.com> | 2009-12-16 07:52:52 (GMT) |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2010-03-09 05:30:46 (GMT) |
| commit | a3a6a590190ca77aedf9de871d941c1139a5a24c (patch) | |
| tree | 3fbc9066b9e1ce9de3b4f73b81467ec2f48d3262 | |
| parent | 0c270807db7c6478d60ab2bc23511fd5868a7a80 (diff) | |
| download | linux-a3a6a590190ca77aedf9de871d941c1139a5a24c.tar.xz | |
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>
| -rw-r--r-- | arch/blackfin/include/asm/dma-mapping.h | 15 | ||||
| -rw-r--r-- | arch/blackfin/kernel/dma-mapping.c | 2 |
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 f9172ff..e63f6d9 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 e937f32..04ddcfe 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); |