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| author | Jiang Liu <jiang.liu@linux.intel.com> | 2015-01-20 10:21:06 +0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2015-01-20 11:44:40 +0100 |
| commit | 9889eaeb7c999cae64006bb98c47f40f412ec875 (patch) | |
| tree | 041a8a53ad133e5677dca39aed31aa0388d80692 | |
| parent | b568b8601f05a591a7ff09d8ee1cedb5b2e815fe (diff) | |
| download | linux-stable-9889eaeb7c999cae64006bb98c47f40f412ec875.tar.gz linux-stable-9889eaeb7c999cae64006bb98c47f40f412ec875.tar.bz2 linux-stable-9889eaeb7c999cae64006bb98c47f40f412ec875.zip | |
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 <jiang.liu@linux.intel.com>
Tested-by: Sander Eikelenboom <linux@eikelenboom.it>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Len Brown <lenb@kernel.org>
Link: http://lkml.kernel.org/r/1421720467-7709-3-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | drivers/acpi/pci_irq.c | 1 |
1 files changed, 0 insertions, 1 deletions
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; } } |