From: Joerg Roedel <jroedel@suse.de>
Date: Fri, 12 Jun 2015 07:14:34 +0000 (+0200)
Subject: iommu/vt-d: Init QI before root entry is allocated
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b63d80d1e01e949dbe469e1d72fc0b7e173dbdd8;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

iommu/vt-d: Init QI before root entry is allocated

QI needs to be available when we write the root entry into
hardware because flushes might be necessary after this.

Tested-by: ZhenHua Li <zhen-hual@hp.com>
Tested-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 4faec337c0cf..989761c8f017 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -2803,6 +2803,8 @@ static int __init init_dmars(void)
 	for_each_active_iommu(iommu, drhd) {
 		g_iommus[iommu->seq_id] = iommu;
 
+		intel_iommu_init_qi(iommu);
+
 		ret = iommu_init_domains(iommu);
 		if (ret)
 			goto free_iommu;
@@ -2819,9 +2821,6 @@ static int __init init_dmars(void)
 			hw_pass_through = 0;
 	}
 
-	for_each_active_iommu(iommu, drhd)
-		intel_iommu_init_qi(iommu);
-
 	if (iommu_pass_through)
 		iommu_identity_mapping |= IDENTMAP_ALL;