linux-kernel - [PATCH 2/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA interrupts

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Date:   Sat,  1 Oct 2016 13:46:15 -0400
From:   Sinan Kaya <okaya@...eaurora.org>
To:     linux-acpi@...r.kernel.org, rjw@...ysocki.net, bhelgaas@...gle.com,
        ravikanth.nalla@....com, linux@...nbow-software.org,
        timur@...eaurora.org, cov@...eaurora.org, jcm@...hat.com,
        alex.williamson@...hat.com
Cc:     linux-pci@...r.kernel.org, agross@...eaurora.org,
        linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, wim@....tudelft.nl,
        Sinan Kaya <okaya@...eaurora.org>, Len Brown <lenb@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA interrupts

The change introduced in commit 103544d86976 ("ACPI,PCI,IRQ: reduce
resource requirements") removed PCI_USING penalty from
acpi_pci_link_allocate function as there is no longer a fixed size penalty
array for both PCI and IRQ interrupts.

We need to add the PCI_USING penalty for ISA interrupts too if the link is
in use and matches our ISA IRQ number.

Signed-off-by: Sinan Kaya <okaya@...eaurora.org>
---
 drivers/acpi/pci_link.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c
index f3792f4..06c2a11 100644
--- a/drivers/acpi/pci_link.c
+++ b/drivers/acpi/pci_link.c
@@ -620,6 +620,10 @@ static int acpi_pci_link_allocate(struct acpi_pci_link *link)
 			    acpi_device_bid(link->device));
 		return -ENODEV;
 	} else {
+		if (link->irq.active < ACPI_MAX_IRQS)
+			acpi_irq_penalty[link->irq.active] +=
+				PIRQ_PENALTY_PCI_USING;
+
 		printk(KERN_WARNING PREFIX "%s [%s] enabled at IRQ %d\n",
 		       acpi_device_name(link->device),
 		       acpi_device_bid(link->device), link->irq.active);
-- 
1.9.1