On powerpc arch, dma_ops of rescanned pci device after system's booting up
won't be
initialized by system, so it will fail to execute the dma_set_mask in the
device's
driver. Initialize it to solve this issue.
Signed-off-by: Yuanquan Chen <b41...@freescale.com>
---
arch/powerpc/include/asm/dma-mapping.h | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/include/asm/dma-mapping.h
b/arch/powerpc/include/asm/dma-mapping.h
index 7816087..22eae53 100644
--- a/arch/powerpc/include/asm/dma-mapping.h
+++ b/arch/powerpc/include/asm/dma-mapping.h
@@ -126,8 +126,11 @@ static inline int dma_supported(struct device *dev, u64
mask)
{
struct dma_map_ops *dma_ops = get_dma_ops(dev);
- if (unlikely(dma_ops == NULL))
- return 0;
+ if (unlikely(dma_ops == NULL)) {
+ set_dma_ops(dev, &dma_direct_ops);
+ set_dma_offset(dev, PCI_DRAM_OFFSET);
+ dma_ops = &dma_direct_ops;
+ }
if (dma_ops->dma_supported == NULL)
return 1;
return dma_ops->dma_supported(dev, mask);
--
1.7.9.5
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