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dma-mapping: use dma_get_mask in dma_addressing_limited
We currently have cases where the dma_addressing_limited() gets
called with dma_mask unset. This causes a NULL pointer dereference.
Use dma_get_mask() accessor to prevent the crash.
Fixes: b866455423
("dma-mapping: add a dma_addressing_limited helper")
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
parent
7b5cf701ea
commit
0653275001
1 changed files with 2 additions and 2 deletions
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@ -689,8 +689,8 @@ static inline int dma_coerce_mask_and_coherent(struct device *dev, u64 mask)
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*/
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*/
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static inline bool dma_addressing_limited(struct device *dev)
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static inline bool dma_addressing_limited(struct device *dev)
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{
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{
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return min_not_zero(*dev->dma_mask, dev->bus_dma_mask) <
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return min_not_zero(dma_get_mask(dev), dev->bus_dma_mask) <
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dma_get_required_mask(dev);
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dma_get_required_mask(dev);
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}
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}
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#ifdef CONFIG_ARCH_HAS_SETUP_DMA_OPS
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#ifdef CONFIG_ARCH_HAS_SETUP_DMA_OPS
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