From 9889eaeb7c999cae64006bb98c47f40f412ec875 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Tue, 20 Jan 2015 10:21:06 +0800 Subject: [PATCH] ACPI: pci: Do not clear pci_dev->irq in acpi_pci_irq_disable() Xen pciback driver assumes that pci_dev->irq won't change after calling pci_disable_device(). But commit cffe0a2b5a34c95a4dadc9ec7132690a5b0f6687 ("x86, irq: Keep balance of IOAPIC pin reference count") frees irq resources and resets pci_dev->irq to zero when pci_disable_device() is called. So this is a hotfix for 3.19 to avoid resetting pci_dev->irq, and another proper fix will be prepared for next merging window. Signed-off-by: Jiang Liu Tested-by: Sander Eikelenboom Cc: Tony Luck Cc: Konrad Rzeszutek Wilk Cc: David Vrabel Cc: Rafael J. Wysocki Cc: Len Brown Link: http://lkml.kernel.org/r/1421720467-7709-3-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner --- drivers/acpi/pci_irq.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c index 5277a0ee5704..b1def411c0b8 100644 --- a/drivers/acpi/pci_irq.c +++ b/drivers/acpi/pci_irq.c @@ -512,7 +512,6 @@ void acpi_pci_irq_disable(struct pci_dev *dev) dev_dbg(&dev->dev, "PCI INT %c disabled\n", pin_name(pin)); if (gsi >= 0) { acpi_unregister_gsi(gsi); - dev->irq = 0; dev->irq_managed = 0; } } -- 2.20.1