These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / arch / x86 / pci / common.c

diff --git a/kernel/arch/x86/pci/common.c b/kernel/arch/x86/pci/common.c
index 8fd6f44..eccd4d9 100644 (file)
--- a/kernel/arch/x86/pci/common.c
+++ b/kernel/arch/x86/pci/common.c
@@ -673,24 +673,30 @@ int pcibios_add_device(struct pci_dev *dev)
        return 0;
 }
 
-int pcibios_enable_device(struct pci_dev *dev, int mask)
+int pcibios_alloc_irq(struct pci_dev *dev)
 {
-       int err;
-
-       if ((err = pci_enable_resources(dev, mask)) < 0)
-               return err;
+       /*
+        * 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;
 
-       if (!pci_dev_msi_enabled(dev))
-               return pcibios_enable_irq(dev);
-       return 0;
+       return pcibios_enable_irq(dev);
 }
 
-void pcibios_disable_device (struct pci_dev *dev)
+void pcibios_free_irq(struct pci_dev *dev)
 {
-       if (!pci_dev_msi_enabled(dev) && pcibios_disable_irq)
+       if (pcibios_disable_irq)
                pcibios_disable_irq(dev);
 }
 
+int pcibios_enable_device(struct pci_dev *dev, int mask)
+{
+       return pci_enable_resources(dev, mask);
+}
+
 int pci_ext_cfg_avail(void)
 {
        if (raw_pci_ext_ops)