iommu/vt-d, trivial: check suitable flag in function detect_intel_iommu()

Flag irq_remapping_enabled is only set by intel_enable_irq_remapping(),
which is called after detect_intel_iommu(). So moving pr_info() from
detect_intel_iommu() to intel_enable_irq_remapping(), which also
slightly simplifies implementation.

Reviewed-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>

diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index 28d93b6..e4c3ea0 100644 (file)
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -556,14 +556,6 @@ int __init detect_intel_iommu(void)
        if (ret)
                ret = check_zero_address();
        {
-               struct acpi_table_dmar *dmar;
-
-               dmar = (struct acpi_table_dmar *) dmar_tbl;
-
-               if (ret && irq_remapping_enabled && cpu_has_x2apic &&
-                   dmar->flags & 0x1)
-                       pr_info("Queued invalidation will be enabled to support x2apic and Intr-remapping.\n");
-
                if (ret && !no_iommu && !iommu_detected && !dmar_disabled) {
                        iommu_detected = 1;
                        /* Make sure ACS will be enabled */

diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
index 3aa9b5c..b9256a4 100644 (file)
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -561,6 +561,8 @@ static int __init intel_enable_irq_remapping(void)
        }
 
        if (x2apic_present) {
+               pr_info("Queued invalidation will be enabled to support x2apic and Intr-remapping.\n");
+
                eim = !dmar_x2apic_optout();
                if (!eim)
                        printk(KERN_WARNING