linux-kernel - [PATCH 1/2] iommu/vt-d: break the for loop if an empty ir

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Date:	Tue, 29 Sep 2015 15:26:08 +0800
From:	Baoquan He <bhe@...hat.com>
To:	joro@...tes.org
Cc:	iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	Baoquan He <bhe@...hat.com>
Subject: [PATCH 1/2] iommu/vt-d: break the for loop if an empty ir_ioapic entry found

No need to continue the loop after it has been found.

Signed-off-by: Baoquan He <bhe@...hat.com>
---
 drivers/iommu/intel_irq_remapping.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
index 9ec4e0d..37b93f5 100644
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -841,8 +841,10 @@ static int ir_parse_one_ioapic_scope(struct acpi_dmar_device_scope *scope,
 		if (ir_ioapic[count].iommu == iommu &&
 		    ir_ioapic[count].id == scope->enumeration_id)
 			return 0;
-		else if (ir_ioapic[count].iommu == NULL && free == -1)
+		else if (ir_ioapic[count].iommu == NULL && free == -1) {
 			free = count;
+			break;
+		}
 	}
 	if (free == -1) {
 		pr_warn("Exceeded Max IO APICS\n");
-- 
2.1.0

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