x86: Use x86_platform for iommu_shutdown

This patch cleans up pci_iommu_shutdown() a bit to use
x86_platform (similar to how IA64 initializes an IOMMU driver).

This adds iommu_shutdown() to x86_platform to avoid calling
every IOMMUs' shutdown functions in pci_iommu_shutdown() in
order. The IOMMU shutdown functions are platform specific (we
don't have multiple different IOMMU hardware) so the current way
is pointless.

An IOMMU driver sets x86_platform.iommu_shutdown to the shutdown
function if necessary.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: joerg.roedel@amd.com
LKML-Reference: <20091027163358F.fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 1 insertions, 5 deletions

diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index c20001e4f556..6acd43e9afd7 100644
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -1297,6 +1297,7 @@ int __init amd_iommu_init(void)
         else
                 printk(KERN_INFO "AMD-Vi: Lazy IO/TLB flushing enabled\n");
 
+        x86_platform.iommu_shutdown = disable_iommus;
 out:
         return ret;
 
@@ -1323,11 +1324,6 @@ free:
         goto out;
 }
 
-void amd_iommu_shutdown(void)
-{
-        disable_iommus();
-}
-
 /****************************************************************************
  *
  * Early detect code. This code runs at IOMMU detection time in the DMA