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authorMichael Ellerman <michael@ellerman.id.au>2009-06-22 23:13:48 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-06-26 14:37:22 +1000
commit6f0b1c6094b3e8eeeb13f8f16c1b2ef452a6f519 (patch)
tree37c076363e30101b9c84babce595cfe7956104a7 /arch/powerpc
parent987fed3bf6982f2627d4fa242caa9026ef61132a (diff)
downloadblackbird-op-linux-6f0b1c6094b3e8eeeb13f8f16c1b2ef452a6f519.tar.gz
blackbird-op-linux-6f0b1c6094b3e8eeeb13f8f16c1b2ef452a6f519.zip
powerpc: Swiotlb breaks pseries
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>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/include/asm/dma-mapping.h24
1 files changed, 18 insertions, 6 deletions
diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h
index 3d9e887c3c0c..b44aaabdd1a6 100644
--- a/arch/powerpc/include/asm/dma-mapping.h
+++ b/arch/powerpc/include/asm/dma-mapping.h
@@ -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 */
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