iommu/irq_remapping: Kill function irq_remapping_supported() and related code
Simplify irq_remapping code by killing irq_remapping_supported() and
related interfaces.
Joerg posted a similar patch at https://lkml.org/lkml/2014/12/15/490,
so assume an signed-off from Joerg.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Tested-by: Joerg Roedel <joro@8bytes.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: iommu@lists.linux-foundation.org
Cc: H. Peter Anvin <hpa@linux.intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: David Rientjes <rientjes@google.com>
Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>
Cc: Jan Beulich <JBeulich@suse.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Oren Twaig <oren@scalemp.com>
Link: http://lkml.kernel.org/r/1420615903-28253-14-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
index 91d5884d..e7449b4 100644
--- a/drivers/iommu/irq_remapping.c
+++ b/drivers/iommu/irq_remapping.c
@@ -199,19 +199,11 @@
irq_remap_broken = 1;
}
-int irq_remapping_supported(void)
-{
- if (disable_irq_remap)
- return 0;
-
- if (!remap_ops || !remap_ops->supported)
- return 0;
-
- return remap_ops->supported();
-}
-
int __init irq_remapping_prepare(void)
{
+ if (disable_irq_remap)
+ return -ENOSYS;
+
remap_ops = &intel_irq_remap_ops;
#ifdef CONFIG_AMD_IOMMU