1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index fd60806d3fd0..c3e7dfcf9ff5 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -694,11 +694,16 @@ static void __iomem *msix_map_region(struct pci_dev *dev, unsigned nr_entries)
 {
         resource_size_t phys_addr;
         u32 table_offset;
+        unsigned long flags;
         u8 bir;
 
         pci_read_config_dword(dev, dev->msix_cap + PCI_MSIX_TABLE,
                               &table_offset);
         bir = (u8)(table_offset & PCI_MSIX_TABLE_BIR);
+        flags = pci_resource_flags(dev, bir);
+        if (!flags || (flags & IORESOURCE_UNSET))
+                return NULL;
+
         table_offset &= PCI_MSIX_TABLE_OFFSET;
         phys_addr = pci_resource_start(dev, bir) + table_offset;