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Record a problem we can't workaround for now regarding duplicate interrupts

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because of links left enabled while in APIC mode.  A large scale rework of
irq links is underway by jhb@ which should fix this eventually.
This commit is contained in:
Nate Lawson 2004-09-20 05:56:01 +00:00
parent 4e526aae71
commit 520467d3ba
1 changed files with 7 additions and 0 deletions
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7
sys/dev/acpica/acpi_pci_link.c
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@ -416,6 +416,13 @@ acpi_pci_link_add_link(ACPI_HANDLE handle, struct acpi_prt_entry *entry)
* zero and flags to indicate this link is not routed. If we can't
* run _DIS (i.e., the method doesn't exist), assume the initial
* IRQ was routed by the BIOS.
*
* XXX Since we detect link devices via _PRT entries but run long
* after APIC mode has been enabled, we don't get a chance to
* disable links that will be unused (especially in APIC mode).
* Leaving them enabled can cause duplicate interrupts for some
* devices. The right fix is to probe links via their PNPID, so we
* see them no matter what the _PRT says.
*/
if (ACPI_SUCCESS(AcpiEvaluateObject(handle, "_DIS", NULL, NULL))) {
link->current_irq = 0;