Subject: [PATCH V4 1/3] ACPI, PCI, IRQ: assign ISA IRQ directly during early boot stages

From: [email-masked] (Sinan Kaya)
Date: Wed, 19 Oct 2016 18:21:02 -0400

The penalty determination of ISA IRQ goes through 4 paths.
1. assign PCI_USING during power up via acpi_irq_penalty_init.
2. update the penalty with acpi_penalize_isa_irq function based on the
active parameter.
3. kernel command line penalty update via acpi_irq_penalty_update function.
4. increment the penalty as USING right after the IRQ is assign to PCI.

acpi_penalize_isa_irq and acpi_irq_penalty_update functions get called
before the ACPI subsystem is started.

These API need to bypass the acpi_irq_get_penalty function.

Signed-off-by: Sinan Kaya <[email-masked]>
---
 drivers/acpi/pci_link.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c
index c983bf7..4f37938 100644
--- a/drivers/acpi/pci_link.c
+++ b/drivers/acpi/pci_link.c
@@ -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] = acpi_isa_irq_penalty[irq] +
 		  (active ? PIRQ_PENALTY_ISA_USED : PIRQ_PENALTY_PCI_USING);
 }
 
-- 
1.9.1