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powerpc: Swiotlb breaks pseries

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Turning on SWIOTLB selects or enables PPC_NEED_DMA_SYNC_OPS, which means
we get the non empty versions of dma_sync_* in asm/dma-mapping.h

On my pseries machine the dma_ops have no such routines and we die with
a null pointer - this patch gets it booting, is there a more elegant way
to do it?

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Michael Ellerman 2009-06-22 23:13:48 +00:00 committed by Benjamin Herrenschmidt
parent 987fed3bf6
commit 6f0b1c6094
1 changed files with 18 additions and 6 deletions
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24
arch/powerpc/include/asm/dma-mapping.h
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@ -309,7 +309,9 @@ static inline void dma_sync_single_for_cpu(struct device *dev,
struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
BUG_ON(!dma_ops);
dma_ops->sync_single_range_for_cpu(dev, dma_handle, 0,
if (dma_ops->sync_single_range_for_cpu)
dma_ops->sync_single_range_for_cpu(dev, dma_handle, 0,
size, direction);
}
@ -320,7 +322,9 @@ static inline void dma_sync_single_for_device(struct device *dev,
struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
BUG_ON(!dma_ops);
dma_ops->sync_single_range_for_device(dev, dma_handle,
if (dma_ops->sync_single_range_for_device)
dma_ops->sync_single_range_for_device(dev, dma_handle,
0, size, direction);
}
@ -331,7 +335,9 @@ static inline void dma_sync_sg_for_cpu(struct device *dev,
struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
BUG_ON(!dma_ops);
dma_ops->sync_sg_for_cpu(dev, sgl, nents, direction);
if (dma_ops->sync_sg_for_cpu)
dma_ops->sync_sg_for_cpu(dev, sgl, nents, direction);
}
static inline void dma_sync_sg_for_device(struct device *dev,
@ -341,7 +347,9 @@ static inline void dma_sync_sg_for_device(struct device *dev,
struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
BUG_ON(!dma_ops);
dma_ops->sync_sg_for_device(dev, sgl, nents, direction);
if (dma_ops->sync_sg_for_device)
dma_ops->sync_sg_for_device(dev, sgl, nents, direction);
}
static inline void dma_sync_single_range_for_cpu(struct device *dev,
@ -351,7 +359,9 @@ static inline void dma_sync_single_range_for_cpu(struct device *dev,
struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
BUG_ON(!dma_ops);
dma_ops->sync_single_range_for_cpu(dev, dma_handle,
if (dma_ops->sync_single_range_for_cpu)
dma_ops->sync_single_range_for_cpu(dev, dma_handle,
offset, size, direction);
}
@ -362,7 +372,9 @@ static inline void dma_sync_single_range_for_device(struct device *dev,
struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
BUG_ON(!dma_ops);
dma_ops->sync_single_range_for_device(dev, dma_handle, offset,
if (dma_ops->sync_single_range_for_device)
dma_ops->sync_single_range_for_device(dev, dma_handle, offset,
size, direction);
}
#else /* CONFIG_PPC_NEED_DMA_SYNC_OPS */