diff options
Diffstat (limited to 'arch/x86/pci/common.c')
| -rw-r--r-- | arch/x86/pci/common.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c index 09d3afc0a181..b106c67f88c5 100644 --- a/arch/x86/pci/common.c +++ b/arch/x86/pci/common.c @@ -674,6 +674,14 @@ int pcibios_add_device(struct pci_dev *dev) int pcibios_alloc_irq(struct pci_dev *dev) { + /* + * If the PCI device was already claimed by core code and has + * MSI enabled, probing of the pcibios IRQ will overwrite + * dev->irq. So bail out if MSI is already enabled. + */ + if (pci_dev_msi_enabled(dev)) + return -EBUSY; + return pcibios_enable_irq(dev); } |