On 2018-09-21 2:00 PM, Bjorn Helgaas wrote: > Ok. I was assuming s->dma_address would have been already set before > the call and would be overwritten by pci_p2pmem_map_sg(). But I guess > that's not the case -- sounds like s->dma_address is undefined before > the call. Correct. It's set by whatever dma_map function operates on it. Logan