On Wed, Jan 27, 2010 at 09:23:51AM -0500, Chris Lalancette wrote:

Similar to the race fixed by be34c3c7efbb1ea8999530f98b99c5dde3793f84, make sure to wait around for KVM to release the resources from a hot-detached PCI device before attempting to rebind that device to the host driver.

Signed-off-by: Chris Lalancette <clalance@redhat.com> --- src/qemu/qemu_driver.c | 39 +++++++++++++++++++++++---------------- 1 files changed, 23 insertions(+), 16 deletions(-)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index bbdbe33..5bf6743 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -2240,6 +2240,26 @@ cleanup: }

static void +qemudReattachManagedDevice(pciDevice *dev) +{ + int retries = 100; + + if (pciDeviceGetManaged(dev)) { + while (pciWaitForDeviceCleanup(dev, "kvm_assigned_device") + && retries) { + usleep(100*1000); + retries--; + } + if (pciReAttachDevice(NULL, dev) < 0) { + virErrorPtr err = virGetLastError(); + VIR_ERROR(_("Failed to re-attach PCI device: %s"), + err ? err->message : ""); + virResetError(err); + } + } +} + +static void qemuDomainReAttachHostDevices(virConnectPtr conn, struct qemud_driver *driver, virDomainDefPtr def) @@ -2279,20 +2299,7 @@ qemuDomainReAttachHostDevices(virConnectPtr conn,

for (i = 0; i < pciDeviceListCount(pcidevs); i++) { pciDevice *dev = pciDeviceListGet(pcidevs, i); - int retries = 100; - if (pciDeviceGetManaged(dev)) { - while (pciWaitForDeviceCleanup(dev, "kvm_assigned_device") - && retries) { - usleep(100*1000); - retries--; - } - if (pciReAttachDevice(NULL, dev) < 0) { - virErrorPtr err = virGetLastError(); - VIR_ERROR(_("Failed to re-attach PCI device: %s"), - err ? err->message : ""); - virResetError(err); - } - } + qemudReattachManagedDevice(dev); }

pciDeviceListFree(conn, pcidevs); @@ -6128,11 +6135,11 @@ static int qemudDomainDetachHostPciDevice(virConnectPtr conn, if (!pci) ret = -1; else { + pciDeviceSetManaged(pci, detach->managed); pciDeviceListDel(conn, driver->activePciHostdevs, pci); if (pciResetDevice(conn, pci, driver->activePciHostdevs) < 0) ret = -1; - if (detach->managed && pciReAttachDevice(conn, pci) < 0) - ret = -1; + qemudReattachManagedDevice(pci); pciFreeDevice(conn, pci); }

ACK, good to make a function for this ! Daniel -- Daniel Veillard | libxml Gnome XML XSLT toolkit http://xmlsoft.org/ daniel@veillard.com | Rpmfind RPM search engine http://rpmfind.net/ http://veillard.com/ | virtualization library http://libvirt.org/