qemu: Introduce inactive PCI device list
pciTrySecondaryBusReset checks if there is active device on the same bus, however, qemu driver doesn't maintain an effective list for the inactive devices, and it passes meaningless argument for parameter "inactiveDevs". e.g. (qemuPrepareHostdevPCIDevices) if (!(pcidevs = qemuGetPciHostDeviceList(hostdevs, nhostdevs))) return -1; ..skipped... if (pciResetDevice(dev, driver->activePciHostdevs, pcidevs) < 0) goto reattachdevs; NB, the "pcidevs" used above are extracted from domain def, and thus one won't be able to attach a device of which bus has other device even detached from host (nodedev-detach). To see more details of the problem: RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=773667 This patch is to resolve the problem by introducing an inactive PCI device list (just like qemu_driver->activePciHostdevs), and the whole logic is: * Add the device to inactive list during nodedev-dettach * Remove the device from inactive list during nodedev-reattach * Remove the device from inactive list during attach-device (for non-managed device) * Add the device to inactive list after detach-device, only if the device is not managed With the above, we have a sufficient inactive PCI device list, and thus we can use it for pciResetDevice. e.g.(qemuPrepareHostdevPCIDevices) if (pciResetDevice(dev, driver->activePciHostdevs, driver->inactivePciHostdevs) < 0) goto reattachdevs;
Showing
想要评论请 注册 或 登录