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

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Date:	Wed, 26 Nov 2014 15:09:16 -0800
From:	tip-bot for Jiang Liu <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	tglx@...utronix.de, gregkh@...uxfoundation.org,
	jiang.liu@...ux.intel.com, bhelgaas@...gle.com, bp@...en8.de,
	rjw@...ysocki.net, joro@...tes.org, yinghai@...nel.org,
	benh@...nel.crashing.org, rdunlap@...radead.org,
	linux-kernel@...r.kernel.org, konrad.wilk@...cle.com,
	tony.luck@...el.com, hpa@...or.com, mingo@...nel.org
Subject: [tip:x86/apic] x86, irq: Directly call native_compose_msi_msg()
  for DMAR IRQ

Commit-ID:  786964a35e95596bbade35eab393fd9b01bd2cad
Gitweb:     http://git.kernel.org/tip/786964a35e95596bbade35eab393fd9b01bd2cad
Author:     Jiang Liu <jiang.liu@...ux.intel.com>
AuthorDate: Tue, 25 Nov 2014 13:53:23 +0800
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Wed, 26 Nov 2014 18:59:25 +0100

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: 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>
Link: http://lkml.kernel.org/r/1416894816-23245-15-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 e82ab79..fa2dd6e 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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