[Patch]: ACPI : Not register gsi for PCI IDE controller in legacy mode

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Subject: ACPI : Not register gsi for PCI IDE controller in legacy mode
>From : Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>

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: Zhao Yakui <yakui.zhao@xxxxxxxxx>
Signed-off-by: Zhang Rui <rui.zhang@xxxxxxxxx>
Signed-off-by: Alan Cox  <alan@xxxxxxxxxxxxxxxxxxx>

---
 drivers/acpi/pci_irq.c |    9 +++++++++
 1 file changed, 9 insertions(+)

Index: linux-2.6.24-rc5/drivers/acpi/pci_irq.c
===================================================================
--- linux-2.6.24-rc5.orig/drivers/acpi/pci_irq.c
+++ linux-2.6.24-rc5/drivers/acpi/pci_irq.c
@@ -429,6 +429,15 @@ int acpi_pci_irq_enable(struct pci_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.


-
To unsubscribe from this list: send the line "unsubscribe linux-ide" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [Linux Filesystems]     [Linux SCSI]     [Linux RAID]     [Git]     [Kernel Newbies]     [Linux Newbie]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Samba]     [Device Mapper]

  Powered by Linux