This enabling should have been done in normal kernel. It's unnecessary
to enable it again in kdump kernel.
And clean up the function comments of init_device_table_dma.
Signed-off-by: Baoquan He <bhe at redhat.com>
---
drivers/iommu/amd_iommu_init.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 47a8fc9..8d5db2e 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -1651,7 +1651,12 @@ static int __init amd_iommu_init_pci(void)
*/
ret = amd_iommu_init_api();
- init_device_table_dma();
+ for_each_iommu(iommu) {
+ if ( !translation_pre_enabled(iommu) ) {
+ init_device_table_dma();
+ break;
+ }
+ }
for_each_iommu(iommu)
iommu_flush_all_caches(iommu);
@@ -1829,8 +1834,7 @@ static int __init init_memory_definitions(struct acpi_table_header *table)
}
/*
- * Init the device table to not allow DMA access for devices and
- * suppress all page faults
+ * Init the device table to not allow DMA access for devices.
*/
static void init_device_table_dma(void)
{
--
2.5.5
