From: Aubrey Li Date: Mon, 21 May 2007 10:09:28 +0000 (+0800) Subject: Blackfin arch: dma_memcpy borken for > 64K X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5f9a3e899897201a49965cd9e1bb2570b3bde2b5;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git Blackfin arch: dma_memcpy borken for > 64K Signed-off-by: Aubrey Li Signed-off-by: Bryan Wu Signed-off-by: Linus Torvalds --- diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c index 1c344acfd487..0ccb0dc3f833 100644 --- a/arch/blackfin/kernel/bfin_dma_5xx.c +++ b/arch/blackfin/kernel/bfin_dma_5xx.c @@ -595,7 +595,7 @@ unsigned short get_dma_curr_ycount(unsigned int channel) } EXPORT_SYMBOL(get_dma_curr_ycount); -void *dma_memcpy(void *dest, const void *src, size_t size) +void *_dma_memcpy(void *dest, const void *src, size_t size) { int direction; /* 1 - address decrease, 0 - address increase */ int flag_align; /* 1 - address aligned, 0 - address unaligned */ @@ -734,6 +734,21 @@ void *dma_memcpy(void *dest, const void *src, size_t size) return dest; } + +void *dma_memcpy(void *dest, const void *src, size_t size) +{ + size_t bulk; + size_t rest; + void * addr; + + bulk = (size >> 16) << 16; + rest = size - bulk; + if (bulk) + _dma_memcpy(dest, src, bulk); + addr = _dma_memcpy(dest+bulk, src+bulk, rest); + return addr; +} + EXPORT_SYMBOL(dma_memcpy); void *safe_dma_memcpy(void *dest, const void *src, size_t size)