linux-kernel - [tip:x86/apic] x86/irq: Directly call native_compose_msi

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Message-ID: <tip-80aa283364a17998dceb577bd185e3380b927544@git.kernel.org>
Date:	Fri, 24 Apr 2015 08:47:23 -0700
From:	tip-bot for Jiang Liu <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	gregkh@...uxfoundation.org, tony.luck@...el.com,
	linux@...elenboom.it, tglx@...utronix.de, joro@...tes.org,
	linux-kernel@...r.kernel.org, jiang.liu@...ux.intel.com,
	rdunlap@...radead.org, yinghai@...nel.org,
	benh@...nel.crashing.org, david.a.cohen@...ux.intel.com,
	hpa@...or.com, david.vrabel@...rix.com, konrad.wilk@...cle.com,
	mingo@...nel.org, sivanich@....com, rjw@...ysocki.net,
	bp@...en8.de, bhelgaas@...gle.com
Subject: [tip:x86/apic] x86/irq: Directly call native_compose_msi_msg()
  for DMAR IRQ

Commit-ID:  80aa283364a17998dceb577bd185e3380b927544
Gitweb:     http://git.kernel.org/tip/80aa283364a17998dceb577bd185e3380b927544
Author:     Jiang Liu <jiang.liu@...ux.intel.com>
AuthorDate: Mon, 13 Apr 2015 14:11:36 +0800
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Fri, 24 Apr 2015 15:36:49 +0200

x86/irq: Directly call native_compose_msi_msg() for DMAR IRQ

DMAR interrupt won't be remapped by interrupt remapping hardware,
so directly call native_compose_msi_msg() for DMAR IRQ to compose MSI
message data. This will help to simplify MSI code later.

Signed-off-by: Jiang Liu <jiang.liu@...ux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc: David Cohen <david.a.cohen@...ux.intel.com>
Cc: Sander Eikelenboom <linux@...elenboom.it>
Cc: David Vrabel <david.vrabel@...rix.com>
Cc: Tony Luck <tony.luck@...el.com>
Cc: Joerg Roedel <joro@...tes.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Rafael J. Wysocki <rjw@...ysocki.net>
Cc: Randy Dunlap <rdunlap@...radead.org>
Cc: Yinghai Lu <yinghai@...nel.org>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Dimitri Sivanich <sivanich@....com>
Link: http://lkml.kernel.org/r/1428905519-23704-15-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 arch/x86/kernel/apic/msi.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c
index c426cd5..9adb871 100644
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -259,12 +259,10 @@ static struct irq_chip dmar_msi_type = {
 
 int arch_setup_dmar_msi(unsigned int irq)
 {
-	int ret;
 	struct msi_msg msg;
+	struct irq_cfg *cfg = irq_cfg(irq);
 
-	ret = msi_compose_msg(NULL, irq, &msg, -1);
-	if (ret < 0)
-		return ret;
+	native_compose_msi_msg(NULL, irq, cfg->dest_apicid, &msg, -1);
 	dmar_msi_write(irq, &msg);
 	irq_set_chip_and_handler_name(irq, &dmar_msi_type, handle_edge_irq,
 				      "edge");
--
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