From: Joerg Roedel <joerg.roedel@amd.com>
Date: Wed, 10 Dec 2008 19:05:52 +0000 (+0100)
Subject: AMD IOMMU: don't remove protection domain from iommu_pd_list
X-Git-Tag: v2.6.29-rc1~522^2~1^2~39
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9e919012e33c481991e46aa4cb13d807cd47b798;p=profile%2Fivi%2Fkernel-x86-ivi.git

AMD IOMMU: don't remove protection domain from iommu_pd_list

Impact: save unneeded logic to add and remove domains to the list

The removal of a protection domain from the iommu_pd_list is not
necessary. Another benefit is that we save complexity because we don't
have to readd it later when the device no longer uses the domain.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index fee16fb..b7b3067 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -844,7 +844,6 @@ static struct dma_ops_domain *find_protection_domain(u16 devid)
 	list_for_each_entry(entry, &iommu_pd_list, list) {
 		if (entry->target_dev == devid) {
 			ret = entry;
-			list_del(&ret->list);
 			break;
 		}
 	}