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fix segfault in msix_save 

This fixes segfault reported by Kevin Wolf,
and simplifies the code in msix_save.

Reported-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Michael S. Tsirkin 2009-07-01 16:28:00 +03:00 committed by Anthony Liguori
parent 391354f126
commit 9a3e12c8a4
1 changed files with 7 additions and 5 deletions
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12
hw/msix.c
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@ -284,11 +284,13 @@ int msix_uninit(PCIDevice *dev)
void msix_save(PCIDevice *dev, QEMUFile *f)
{
unsigned nentries = (pci_get_word(dev->config + PCI_MSIX_FLAGS) &
PCI_MSIX_FLAGS_QSIZE) + 1;
qemu_put_buffer(f, dev->msix_table_page, nentries * MSIX_ENTRY_SIZE);
qemu_put_buffer(f, dev->msix_table_page + MSIX_PAGE_PENDING,
(nentries + 7) / 8);
unsigned n = dev->msix_entries_nr;
if (!dev->cap_present & QEMU_PCI_CAP_MSIX)
return;
qemu_put_buffer(f, dev->msix_table_page, n * MSIX_ENTRY_SIZE);
qemu_put_buffer(f, dev->msix_table_page + MSIX_PAGE_PENDING, (n + 7) / 8);
}
/* Should be called after restoring the config space. */