linux-kernel - [ 024/108] iommu/amd: Fix missing iommu_shutdown initialization in passthrough mode

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Date:	Mon, 23 Jul 2012 02:07:15 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Shuah Khan <shuah.khan@...com>,
	Joerg Roedel <joerg.roedel@....com>
Subject: [ 024/108] iommu/amd: Fix missing iommu_shutdown initialization in passthrough
 mode

3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Shuah Khan <shuah.khan@...com>

commit f2f12b6fc032c7b1419fd6db84e2868b5f05a878 upstream.

The iommu_shutdown callback is not initialized when the AMD
IOMMU driver runs in passthrough mode. Fix that by moving
the callback initialization before the check for
passthrough mode.

Signed-off-by: Shuah Khan <shuah.khan@...com>
Signed-off-by: Joerg Roedel <joerg.roedel@....com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 542024b..c04ddca 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -1641,6 +1641,8 @@ static int __init amd_iommu_init(void)
 
 	register_syscore_ops(&amd_iommu_syscore_ops);
 
+	x86_platform.iommu_shutdown = disable_iommus;
+
 	if (iommu_pass_through)
 		goto out;
 
@@ -1649,7 +1651,6 @@ static 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;
 


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