From a16d391bf3e5c7c42edd5e86d86b4f2baf003a3e Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Mon, 14 Jan 2008 02:22:11 -0500 Subject: [PATCH] ACPI: Not register gsi for PCI IDE controller in legacy mode patch 96c2a8766bf4fe91abac863749c11637fabcc64f in mainline. 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 Signed-off-by: Greg Kroah-Hartman --- 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 dd3186abe07a..62010c2481b3 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. -- 2.39.5