src/patches/xen-passthrough-fix.patch

   1 From: jbeulich@novell.com
   2 Subject: also register pirq for DomU (which doesn't use the IO-APIC code)
   3 References: bnc#463596
   4 Patch-mainline: obsolete
   5
   6 Additionally make sure IRQ chip and handler aren't getting set twice
   7 for an IRQ possibly in use by more than one device.
   8
   9 --- head-2009-02-02.orig/arch/x86/pci/pcifront.c        2009-02-03 17:27:59.000000000 +0100
  10 +++ head-2009-02-02/arch/x86/pci/pcifront.c     2009-02-03 11:22:28.000000000 +0100
  11 @@ -8,12 +8,14 @@
  12  #include <linux/init.h>
  13  #include <linux/pci.h>
  14  #include <asm/acpi.h>
  15 +#include <xen/evtchn.h>
  16  #include "pci.h"
  17
  18  static int pcifront_enable_irq(struct pci_dev *dev)
  19  {
  20         u8 irq;
  21         pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
  22 +       evtchn_register_pirq(irq);
  23         dev->irq = irq;
  24
  25         return 0;
  26 --- head-2009-02-02.orig/drivers/xen/core/evtchn.c      2009-01-14 15:16:43.000000000 +0100
  27 +++ head-2009-02-02/drivers/xen/core/evtchn.c   2009-02-03 17:34:44.000000000 +0100
  28 @@ -1561,7 +1561,7 @@ core_initcall(evtchn_register);
  29  void evtchn_register_pirq(int irq)
  30  {
  31         BUG_ON(irq < PIRQ_BASE || irq - PIRQ_BASE > NR_PIRQS);
  32 -       if (identity_mapped_irq(irq))
  33 +       if (identity_mapped_irq(irq) || type_from_irq(irq) != IRQT_UNBOUND)
  34                 return;
  35         irq_info[irq] = mk_irq_info(IRQT_PIRQ, irq, 0);
  36         set_irq_chip_and_handler_name(irq, &pirq_chip, handle_level_irq,