ebiederm@xxxxxxxxxxxx (Eric W. Biederman) writes: > Kenji Kaneshige <kaneshige.kenji@xxxxxxxxxxxxxx> writes: > >> In the current pciehp implementation, minimum resources enough to >> enable devices under the bridge are assigned when P2P bridge is >> hot-added. My concern is that enough resources are NOT assigned to >> the bridge if an additional slot is empty. As a result, hot-add >> adapter card on the additional slot won't work because of resource >> shortage. > > It is a good concern. Right now I know I won't need a bus number > but you are quite right the mmio and iospace may be a problem. > > My preliminary test case doesn't cover that so I will look and > confirm it is a problem I need to address. Tested. I do have a problem with not assigning resources to new bridges. My plan to handle this currently is to do what the pci code does for cardbus without resources. To give them a fixed sized resource assignment without looking downstream from the bridge. The code looks simple, and we have existing practice so it should not be too bad to deal with. Eric -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
