linux-kernel - [PATCH 15/19] iommu/vt-d: Disable IRQ remapping in intel_prepare_irq

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Date:	Sat, 13 Jun 2015 08:47:23 +0200
From:	Joerg Roedel <joro@...tes.org>
To:	iommu@...ts.linux-foundation.org
Cc:	David Woodhouse <dwmw2@...radead.org>, zhen-hual@...com,
	bhe@...hat.com, ddutile@...hat.com, alex.williamson@...hat.com,
	dyoung@...hat.com, linux-kernel@...r.kernel.org,
	jroedel@...tes.org, joro@...tes.org, Joerg Roedel <jroedel@...e.de>
Subject: [PATCH 15/19] iommu/vt-d: Disable IRQ remapping in intel_prepare_irq_remapping

From: Joerg Roedel <jroedel@...e.de>

Move it to this function for now, so that the copy routines
for irq remapping take no effect yet.

Signed-off-by: Joerg Roedel <jroedel@...e.de>
---
 drivers/iommu/intel_irq_remapping.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
index 46d17e1..f1711836 100644
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -654,6 +654,9 @@ static int __init intel_prepare_irq_remapping(void)
 			pr_info("%s does not support EIM\n", iommu->name);
 			eim = 0;
 		}
+
+		/* Disable IRQ remapping if it is already enabled */
+		iommu_disable_irq_remapping(iommu);
 	}
 
 	eim_mode = eim;
@@ -682,9 +685,6 @@ static int __init intel_enable_irq_remapping(void)
 	struct intel_iommu *iommu;
 	bool setup = false;
 
-	for_each_iommu(iommu, drhd)
-		iommu_disable_irq_remapping(iommu);
-
 	/*
 	 * Setup Interrupt-remapping for all the DRHD's now.
 	 */
-- 
1.9.1

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