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msi: Guard msi_reset with msi_present

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Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jan Kiszka 2012-05-11 11:42:37 -03:00 committed by Michael S. Tsirkin
parent 8ab60a0703
commit 520064c8b1
1 changed files with 4 additions and 0 deletions
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4
hw/msi.c
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@ -191,6 +191,10 @@ void msi_reset(PCIDevice *dev)
uint16_t flags;
bool msi64bit;
if (!msi_present(dev)) {
return;
}
flags = pci_get_word(dev->config + msi_flags_off(dev));
flags &= ~(PCI_MSI_FLAGS_QSIZE | PCI_MSI_FLAGS_ENABLE);
msi64bit = flags & PCI_MSI_FLAGS_64BIT;