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iommu/amd: Check for irq-remap support amd_iommu_prepare() 

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@suse.de>
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Tested-by: Joerg Roedel <joro@8bytes.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: iommu@lists.linux-foundation.org
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Link: http://lkml.kernel.org/r/1420615903-28253-13-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Joerg Roedel 2015-01-07 15:31:39 +08:00 committed by Thomas Gleixner
parent 5fcee53ce7
commit 84d0779304
1 changed files with 3 additions and 0 deletions
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3
drivers/iommu/amd_iommu_init.c
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@ -2123,6 +2123,9 @@ static int __init iommu_go_to_state(enum iommu_init_state state)
#ifdef CONFIG_IRQ_REMAP #ifdef CONFIG_IRQ_REMAP
int __init amd_iommu_prepare(void) int __init amd_iommu_prepare(void)
{ {
if (!amd_iommu_irq_remap)
return -1;
return iommu_go_to_state(IOMMU_ACPI_FINISHED); return iommu_go_to_state(IOMMU_ACPI_FINISHED);
} }