[Patch v2 12/16] iommu/amd: Check for irq-remap support amd_iommu_prepare()

From: Jiang Liu
Date: Wed Jan 07 2015 - 02:29:58 EST


From: Joerg Roedel <jroedel@xxxxxxx>

This allows to get rid of the irq_remapping_supported()
function and all its call-backs into the Intel and AMD
IOMMU drivers.

Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
---
drivers/iommu/amd_iommu_init.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index b0522f15730f..0039f87f48b8 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -2123,6 +2123,9 @@ static int __init iommu_go_to_state(enum iommu_init_state state)
#ifdef CONFIG_IRQ_REMAP
int __init amd_iommu_prepare(void)
{
+ if (!amd_iommu_irq_remap)
+ return -1;
+
return iommu_go_to_state(IOMMU_ACPI_FINISHED);
}

--
1.7.10.4

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