On Thu, Mar 11, 2021 at 04:31:37PM -0700, Logan Gunthorpe wrote:
 
> +int dma_pci_p2pdma_supported(struct device *dev)
   ^^^
  bool?

> +{
> +     const struct dma_map_ops *ops = get_dma_ops(dev);
> +
> +     return !ops || ops->flags & DMA_F_PCI_P2PDMA_SUPPORTED;

Is this logic correct?  I would have expected.

        return (ops && ops->flags & DMA_F_PCI_P2PDMA_SUPPORTED);

Ira
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