Commit-ID: 9889eaeb7c999cae64006bb98c47f40f412ec875
Gitweb: http://git.kernel.org/tip/9889eaeb7c999cae64006bb98c47f40f412ec875
Author: Jiang Liu <[email protected]>
AuthorDate: Tue, 20 Jan 2015 10:21:06 +0800
Committer: Thomas Gleixner <[email protected]>
CommitDate: Tue, 20 Jan 2015 11:44:40 +0100
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 <[email protected]>
Tested-by: Sander Eikelenboom <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Konrad Rzeszutek Wilk <[email protected]>
Cc: David Vrabel <[email protected]>
Cc: Rafael J. Wysocki <[email protected]>
Cc: Len Brown <[email protected]>
Link:
http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>
---
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 5277a0e..b1def41 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;
}
}
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