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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-12-21 03:14:03 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-12-21 03:14:03 +0100 |
| commit | e219aafe50fd546b8686582ddbafd24c3c2eda04 (patch) | |
| tree | a665e08ca8d42f20ac8e5dcc8565d666cffb26bd /arch/x86/pci/common.c | |
| parent | ffe12855a5f7f195589130197558e6a5c276caa4 (diff) | |
| parent | 24c96dc79c5e76d3cff7a33f955a4d3244644766 (diff) | |
Merge back earlier 'pm-domains' material for v4.5.
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 dc78a4a9a4666..eccd4d99e6a4a 100644 --- a/arch/x86/pci/common.c +++ b/arch/x86/pci/common.c @@ -675,6 +675,14 @@ 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); } |