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SubjectRe: pci_pool reap?
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> There is a certain controversy about pci_free_consistent called
> from an interrupt. It seems that most architectures would
> have no problems, and only arm is problematic. RMK says that

The discussion was about pci_alloc_consistent. The free case seems to be
explicitly disallowed in all cases.

(from DMA-mapping.txt)

To unmap and free such a DMA region, you call:

pci_free_consistent(dev, size, cpu_addr, dma_handle);

where dev, size are the same as in the above call and cpu_addr and
dma_handle are the values pci_alloc_consistent returned to you.
This function may not be called in interrupt context.
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