Patch "ACPI/PCI: pci_link: Include PIRQ_PENALTY_PCI_USING for ISA IRQs" has been added to the 4.8-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    ACPI/PCI: pci_link: Include PIRQ_PENALTY_PCI_USING for ISA IRQs

to the 4.8-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     acpi-pci-pci_link-include-pirq_penalty_pci_using-for-isa-irqs.patch
and it can be found in the queue-4.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 98756f5319c64c883caa910dce702d9edefe7810 Mon Sep 17 00:00:00 2001
From: Sinan Kaya <okaya@codeaurora.org>
Date: Mon, 24 Oct 2016 00:31:32 -0400
Subject: ACPI/PCI: pci_link: Include PIRQ_PENALTY_PCI_USING for ISA IRQs

From: Sinan Kaya <okaya@codeaurora.org>

commit 98756f5319c64c883caa910dce702d9edefe7810 upstream.

Commit 103544d86976 ("ACPI,PCI,IRQ: reduce resource requirements")
replaced the addition of PIRQ_PENALTY_PCI_USING in acpi_pci_link_allocate()
with an addition in acpi_irq_pci_sharing_penalty(), but f7eca374f000
("ACPI,PCI,IRQ: separate ISA penalty calculation") removed the use
of acpi_irq_pci_sharing_penalty() for ISA IRQs.

Therefore, PIRQ_PENALTY_PCI_USING is missing from ISA IRQs used by
interrupt links.  Include that penalty by adding it in the
acpi_pci_link_allocate() path.

Fixes: f7eca374f000 (ACPI,PCI,IRQ: separate ISA penalty calculation)
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/acpi/pci_link.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/acpi/pci_link.c
+++ b/drivers/acpi/pci_link.c
@@ -608,6 +608,10 @@ static int acpi_pci_link_allocate(struct
 			    acpi_device_bid(link->device));
 		return -ENODEV;
 	} else {
+		if (link->irq.active < ACPI_MAX_ISA_IRQS)
+			acpi_isa_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);


Patches currently in stable-queue which might be from okaya@codeaurora.org are

queue-4.8/acpi-pci-pci_link-penalize-sci-correctly.patch
queue-4.8/acpi-pci-irq-assign-isa-irq-directly-during-early-boot-stages.patch
queue-4.8/acpi-pci-pci_link-include-pirq_penalty_pci_using-for-isa-irqs.patch