Re: [PATCH 4/4] dma-mapping: clear dev->dma_ops in arch_teardown_dma_ops

[Michael Ellerman <mpe@xxxxxxxxxxxxxx>]

Christoph Hellwig <hch@xxxxxx> writes:

> Looking at the code I think this commit is simply broken for
> architectures not using arch_setup_dma_ops, but instead setting up
> the dma ops through arch specific magic.

I arch_setup_dma_ops() called from of_dma_configure(), but
pci_dma_configure() doesn't call that for this device:

static int pci_dma_configure(struct device *dev)
{
	...
	if (IS_ENABLED(CONFIG_OF) && bridge->parent &&
	    bridge->parent->of_node) {
		ret = of_dma_configure(dev, bridge->parent->of_node, true);

bridge->parent is NULL.

So I don't think arch_setup_dma_ops() would help here?

> I'll revert the patch.

Thanks.

cheers