> + const char *page, size_t count)
> +{
> + struct nvmet_port *port = to_nvmet_port(item);
> + struct device *dev;
> + struct pci_dev *p2p_dev = NULL;
> + bool use_p2pmem;
> +
> + switch (page[0]) {
> + case 'y':
> + case 'Y':
> + case 'a':
> + case 'A':
> + use_p2pmem = true;
> + break;
> + case 'n':
> + case 'N':
> + use_p2pmem = false;
> + break;
> + default:
> + dev = bus_find_device_by_name(&pci_bus_type, NULL, page);
> + if (!dev) {
> + pr_err("No such PCI device: %s\n", page);
> + return -ENODEV;
> + }
> +
> + use_p2pmem = true;
> + p2p_dev = to_pci_dev(dev);
> +
> + if (!pci_has_p2pmem(p2p_dev)) {
> + pr_err("PCI device has no peer-to-peer memory: %s\n",
> + page);
> + pci_dev_put(p2p_dev);
> + return -ENODEV;
> + }
> + }
Yikes. Shouldn't auto just be the normal yes case instead of this
string parsing mess?
> + if (rsp->req.sg != &rsp->cmd->inline_sg) {
> + if (rsp->req.p2p_dev)
> + pci_p2pmem_free_sgl(rsp->req.p2p_dev, rsp->req.sg,
> + rsp->req.sg_cnt);
> + else
> + sgl_free(rsp->req.sg);
> + }
Can we factor this into a helper, as the other target drivers (fc for now,
tcp soon) using sgl allocatins should share the code?
(same for the alloc side)
