From 96c2a8766bf4fe91abac863749c11637fabcc64f Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Thu, 10 Jan 2008 22:49:58 -0500 Subject: [PATCH] ACPI : Not register gsi for PCI IDE controller in legacy mode When PCI IDE controller works in legacy mode and no PRT entry is found in ACPI PRT table, OSPM will neither read the irq number from the IDE PCI configuration space nor call the function of acpi_register_gsi to register gsi. http://bugzilla.kernel.org/show_bug.cgi?id=5637 Signed-off-by: Alan Cox Signed-off-by: Zhao Yakui Signed-off-by: Zhang Rui Signed-off-by: Len Brown --- drivers/acpi/pci_irq.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c index dd3186a..62010c2 100644 --- a/drivers/acpi/pci_irq.c +++ b/drivers/acpi/pci_irq.c @@ -429,6 +429,15 @@ int acpi_pci_irq_enable(struct pci_dev *dev) &polarity, &link, acpi_pci_allocate_irq); + if (irq < 0) { + /* + * IDE legacy mode controller IRQs are magic. Why do compat + * extensions always make such a nasty mess. + */ + if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE && + (dev->class & 0x05) == 0) + return 0; + } /* * No IRQ known to the ACPI subsystem - maybe the BIOS / * driver reported one, then use it. Exit in any case. -- 2.7.4