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qemu: don't assume slot 0 is unused/reserved.

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When qemuAssignDevicePCISlots() is looking for companion controllers
for a USB controller that has no PCI address specified, it initializes
a virDevicePCIAddress to 0000:00:00.0, fills it in with the
companion's address if one is found, then checks whether or not there
was a find based on slot == 0. On a system with a single PCI bus, that
is a valid way to check, because slot 0 is reserved, but on most other
PCI buses, slot 0 is not reserved, and is open for use by any
device. This patch adds a separate bool that is set when a companion
is found rather than relying on the faulty information provided with
"slot == 0".
This commit is contained in:
Laine Stump 2015-10-21 14:49:06 -04:00
parent 2b6f6ad64b
commit 7dbb5fce06
1 changed files with 4 additions and 1 deletions
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5
src/qemu/qemu_command.c
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@ -2538,11 +2538,14 @@ qemuAssignDevicePCISlots(virDomainDefPtr def,
/* USB2 needs special handling to put all companions in the same slot */
if (IS_USB2_CONTROLLER(def->controllers[i])) {
virDevicePCIAddress addr = { 0, 0, 0, 0, false };
bool foundAddr = false;
memset(&tmp_addr, 0, sizeof(tmp_addr));
for (j = 0; j < i; j++) {
if (IS_USB2_CONTROLLER(def->controllers[j]) &&
def->controllers[j]->idx == def->controllers[i]->idx) {
addr = def->controllers[j]->info.addr.pci;
foundAddr = true;
break;
}
}
@ -2563,7 +2566,7 @@ qemuAssignDevicePCISlots(virDomainDefPtr def,
break;
}
if (addr.slot == 0) {
if (!foundAddr) {
/* This is the first part of the controller, so need
* to find a free slot & then reserve a function */
if (virDomainPCIAddressGetNextSlot(addrs, &tmp_addr, flags) < 0)