PCI: add routines for debugging and handling lost interrupts
We're getting a lot of storage drivers blamed for interrupt misrouting
issues. This patch provides a standard way of reporting the problem
... and, if possible, correcting it.
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 752def8..c75b82b 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -546,6 +546,13 @@
unsigned int devfn);
#endif /* CONFIG_PCI_LEGACY */
+enum pci_lost_interrupt_reason {
+ PCI_LOST_IRQ_NO_INFORMATION = 0,
+ PCI_LOST_IRQ_DISABLE_MSI,
+ PCI_LOST_IRQ_DISABLE_MSIX,
+ PCI_LOST_IRQ_DISABLE_ACPI,
+};
+enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev);
int pci_find_capability(struct pci_dev *dev, int cap);
int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
int pci_find_ext_capability(struct pci_dev *dev, int cap);