On 01/03/18 11:02 AM, Bjorn Helgaas wrote:
void pci_enable_acs(struct pci_dev *dev) { + if (pci_p2pdma_disable_acs(dev)) + return;This doesn't read naturally to me. I do see that when CONFIG_PCI_P2PDMA is not set, pci_p2pdma_disable_acs() does nothing and returns 0, so we'll go ahead and try to enable ACS as before. But I think it would be clearer to have an #ifdef CONFIG_PCI_P2PDMA right here so it's more obvious that we only disable ACS when it's selected.
I could do this... however, I wrote it this way because I've read Linus dislikes using #ifdef's inside function bodies and I personally agree with that sentiment.
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