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ACPI/PCI/IRQ: assign ISA IRQ directly during early boot stages

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We do not want to store the SCI penalty in the acpi_isa_irq_penalty[]
table because acpi_isa_irq_penalty[] only holds ISA IRQ penalties and
there's no guarantee that the SCI is an ISA IRQ.  We add in the SCI
penalty as a special case in acpi_irq_get_penalty().

But if we called acpi_penalize_isa_irq() or acpi_irq_penalty_update()
for an SCI that happened to be an ISA IRQ, they stored the SCI
penalty (part of the acpi_irq_get_penalty() return value) in
acpi_isa_irq_penalty[].  Subsequent calls to acpi_irq_get_penalty()
returned a penalty that included *two* SCI penalties.

Fixes: 103544d869 (ACPI,PCI,IRQ: reduce resource requirements)
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Jonathan Liu <net147@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Sinan Kaya 2016-10-24 00:31:30 -04:00 committed by Rafael J. Wysocki
parent 07d9a38068
commit eeaed4bb5a
1 changed files with 2 additions and 2 deletions
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4
drivers/acpi/pci_link.c
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@ -849,7 +849,7 @@ static int __init acpi_irq_penalty_update(char *str, int used)
continue;
if (used)
new_penalty = acpi_irq_get_penalty(irq) +
new_penalty = acpi_isa_irq_penalty[irq] +
PIRQ_PENALTY_ISA_USED;
else
new_penalty = 0;
@ -871,7 +871,7 @@ static int __init acpi_irq_penalty_update(char *str, int used)
void acpi_penalize_isa_irq(int irq, int active)
{
if ((irq >= 0) && (irq < ARRAY_SIZE(acpi_isa_irq_penalty)))
acpi_isa_irq_penalty[irq] = acpi_irq_get_penalty(irq) +
acpi_isa_irq_penalty[irq] +=
(active ? PIRQ_PENALTY_ISA_USED : PIRQ_PENALTY_PCI_USING);
}