diff options
| author | Jan Kiszka <jan.kiszka@siemens.com> | 2011-04-29 13:24:59 +0200 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2011-05-03 16:19:09 -0300 |
| commit | 70757dcaa40e14978bf287084d8fab9efb815a2d (patch) | |
| tree | f879ea130449225d3aff09005f60f0ef84f0c185 | |
| parent | 6c1ec4cf90f2dfb299ac4469952fbbc8a9f8294c (diff) | |
qemu-kvm: Limit MSI vector walk to actual array size
We only need to walk as many vectors on updates as the device supports.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| -rw-r--r-- | hw/msi.c | 4 |
1 files changed, 3 insertions, 1 deletions
@@ -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) { |