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| author | Ingo Molnar <mingo@elte.hu> | 2008-07-18 19:53:16 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-18 19:53:16 +0200 |
| commit | 9b610fda0df5d0f0b0c64242e37441ad1b384aac (patch) | |
| tree | 0ea14b15f2e6546f37fe18d8ac3dc83077ec0e55 /arch/powerpc/lib/dma-noncoherent.c | |
| parent | b8f8c3cf0a4ac0632ec3f0e15e9dc0c29de917af (diff) | |
| parent | 5b664cb235e97afbf34db9c4d77f08ebd725335e (diff) | |
| download | op-kernel-dev-9b610fda0df5d0f0b0c64242e37441ad1b384aac.zip op-kernel-dev-9b610fda0df5d0f0b0c64242e37441ad1b384aac.tar.gz | |
Merge branch 'linus' into timers/nohz
Diffstat (limited to 'arch/powerpc/lib/dma-noncoherent.c')
| -rw-r--r-- | arch/powerpc/lib/dma-noncoherent.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/arch/powerpc/lib/dma-noncoherent.c b/arch/powerpc/lib/dma-noncoherent.c index 6656d47..5d83907 100644 --- a/arch/powerpc/lib/dma-noncoherent.c +++ b/arch/powerpc/lib/dma-noncoherent.c @@ -348,8 +348,15 @@ void __dma_sync(void *vaddr, size_t size, int direction) switch (direction) { case DMA_NONE: BUG(); - case DMA_FROM_DEVICE: /* invalidate only */ - invalidate_dcache_range(start, end); + case DMA_FROM_DEVICE: + /* + * invalidate only when cache-line aligned otherwise there is + * the potential for discarding uncommitted data from the cache + */ + if ((start & (L1_CACHE_BYTES - 1)) || (size & (L1_CACHE_BYTES - 1))) + flush_dcache_range(start, end); + else + invalidate_dcache_range(start, end); break; case DMA_TO_DEVICE: /* writeback only */ clean_dcache_range(start, end); |
