[Patch Part1 v7 14/38] x86/irq: Directly call native_compose_msi_msg() for DMAR IRQ

[Jiang Liu]

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@xxxxxxxxxxxxxxx>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Joerg Roedel <joro@xxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Rafael J. Wysocki <rjw@xxxxxxxxxxxxx>
Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Yinghai Lu <yinghai@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Link: http://lkml.kernel.org/r/1416894816-23245-15-git-send-email-jiang.liu@xxxxxxxxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 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 e82ab7973477..fa2dd6ebcaea 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");
-- 
1.7.10.4

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