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Fix PCI host reattach on domain detach.

Browse Source 
Similar to the race fixed by
be34c3c7ef, 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>
This commit is contained in:
Chris Lalancette 2010-01-26 10:01:23 -05:00
parent 09080c38d1
commit 29727bacd7
1 changed files with 23 additions and 16 deletions
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39
src/qemu/qemu_driver.c
View File

@ -2239,6 +2239,26 @@ cleanup:
return ret;
}
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,
@ -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);
}