linux-kernel - [PATCH 3.2 40/59] PCI: Disable boot interrupt quirk for ASUS M2N-LR

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Date:   Fri, 18 Aug 2017 14:13:13 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "Stefan Assmann" <sassmann@...nic.de>,
        "Solomon Peachy" <pizza@...ftnet.org>,
        "Bjorn Helgaas" <bhelgaas@...gle.com>
Subject: [PATCH 3.2 40/59] PCI: Disable boot interrupt quirk for ASUS M2N-LR

3.2.92-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Stefan Assmann <sassmann@...nic.de>

commit c4e649b09f55595e6df6da5465a5b3cfc93557c1 upstream.

The ASUS M2N-LR should not trigger boot interrupt quirks although it
carries an Intel 6702PXH.  On this board the boot interrupt quirks cause
incorrect IRQ assignments and should be disabled.

Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=43074
Tested-by: Solomon Peachy <pizza@...ftnet.org>
Signed-off-by: Stefan Assmann <sassmann@...nic.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/pci/quirks.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1733,6 +1733,29 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_IN
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x260b, quirk_intel_pcie_pm);
 
 #ifdef CONFIG_X86_IO_APIC
+static int dmi_disable_ioapicreroute(const struct dmi_system_id *d)
+{
+	noioapicreroute = 1;
+	pr_info("%s detected: disable boot interrupt reroute\n", d->ident);
+
+	return 0;
+}
+
+static struct dmi_system_id boot_interrupt_dmi_table[] = {
+	/*
+	 * Systems to exclude from boot interrupt reroute quirks
+	 */
+	{
+		.callback = dmi_disable_ioapicreroute,
+		.ident = "ASUSTek Computer INC. M2N-LR",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTek Computer INC."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "M2N-LR"),
+		},
+	},
+	{}
+};
+
 /*
  * Boot interrupts on some chipsets cannot be turned off. For these chipsets,
  * remap the original interrupt in the linux kernel to the boot interrupt, so
@@ -1741,6 +1764,7 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_IN
  */
 static void quirk_reroute_to_boot_interrupts_intel(struct pci_dev *dev)
 {
+	dmi_check_system(boot_interrupt_dmi_table);
 	if (noioapicquirk || noioapicreroute)
 		return;