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[Qemu-commits] [COMMIT 9a3e12c] fix segfault in msix_save
From: |
Anthony Liguori |
Subject: |
[Qemu-commits] [COMMIT 9a3e12c] fix segfault in msix_save |
Date: |
Fri, 10 Jul 2009 19:16:42 -0000 |
From: Michael S. Tsirkin <address@hidden>
This fixes segfault reported by Kevin Wolf,
and simplifies the code in msix_save.
Reported-by: Kevin Wolf <address@hidden>
Signed-off-by: Michael S. Tsirkin <address@hidden>
Signed-off-by: Anthony Liguori <address@hidden>
diff --git a/hw/msix.c b/hw/msix.c
index c031842..e130857 100644
--- a/hw/msix.c
+++ b/hw/msix.c
@@ -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. */
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