We only need to walk as many vectors on updates as the device supports.
Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
---
hw/msi.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/hw/msi.c b/hw/msi.c
index ddcfedd..92773e5 100644
--- a/hw/msi.c
+++ b/hw/msi.c
@@ -134,13 +134,15 @@ static void kvm_msi_message_from_vector(PCIDevice *dev, unsigned vector,
static void kvm_msi_update(PCIDevice *dev)
{
uint16_t flags = pci_get_word(dev->config + msi_flags_off(dev));
+ unsigned int max_vectors = 1 <<
+ ((flags & PCI_MSI_FLAGS_QMASK) >> (ffs(PCI_MSI_FLAGS_QMASK) - 1));
unsigned int nr_vectors = msi_nr_vectors(flags);
KVMMsiMessage new_entry, *entry;
bool changed = false;
unsigned int vector;
int r;
- for (vector = 0; vector < 32; vector++) {
+ for (vector = 0; vector < max_vectors; vector++) {
entry = dev->msi_irq_entries + vector;
if (vector >= nr_vectors) {
--
1.7.1
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