[libvirt] [PATCH 06/21] qemu_hotplug: eliminate unnecessary call to qemuDomainDetachNetDevice()

qemuDomainDetachHostDevice() has a check at the end that calls qemuDomainDetachNetDevice() in the case that the hostdev is actually a Net device of type='hostdev'. A long time ago when device removal was (supposedly but not actually) synchronous, this would cause some extra code to be run prior to removing the device (e.g. restoring the original MAC address of the device, undoing some sort of virtual port profile, etc). For quite awhile now the device removal has been asynchronous, so that "extra teardown" isn't handled by the detach function, but instead is handled by the Remove function called at a later time. The result is that when we call qemuDomainDetachNetDevice() from qemuDomainDetachHostDevice(), it ends up just calling qemuDomainDetachThisHostDevice() and returning, which is exactly what we do for all other hostdevs anyway. Based on that, remove the behavioral difference when parent.type == VIR_DOMAIN_DEVICE_NET, and just call qemuDomainDetachThisHostDevice() for all hostdevs. Signed-off-by: Laine Stump <laine(a)laine.org&gt; --- src/qemu/qemu_hotplug.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index 389d16b090..af99f3bf4c 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -5640,13 +5640,7 @@ int qemuDomainDetachHostDevice(virQEMUDriverPtr driver, return -1; } - /* If this is a network hostdev, we need to use the higher-level detach - * function so that mac address / virtualport are reset - */ - if (detach->parent.type == VIR_DOMAIN_DEVICE_NET) - return qemuDomainDetachNetDevice(driver, vm, &detach->parent, async); - else - return qemuDomainDetachThisHostDevice(driver, vm, detach, async); + return qemuDomainDetachThisHostDevice(driver, vm, detach, async); } -- 2.20.1