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| author |   Ingo Molnar <mingo@elte.hu> | 2008-07-18 22:00:54 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-18 22:00:54 +0200 |
| commit | bb2c018b09b681d43f5e08124b83e362647ea82b (patch) | |
| tree | d794902c78f9fdd04ed88a4b8d451ed6f9292ec0 /arch/powerpc/lib/dma-noncoherent.c | |
| parent | Merge branch 'linus' into cpus4096 (diff) | |
| parent | Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2 (diff) | |
| download | linux-dev-bb2c018b09b681d43f5e08124b83e362647ea82b.tar.xz linux-dev-bb2c018b09b681d43f5e08124b83e362647ea82b.zip | |
Merge branch 'linus' into cpus4096
Conflicts:
drivers/acpi/processor_throttling.c
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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 6656d47841d0..5d83907f6591 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); |