diff options
Diffstat (limited to 'drivers/pci/msi.c')
| -rw-r--r-- | drivers/pci/msi.c | 5 |
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; |