Seeing as translations are pre-enabled, all devices will be set for
deferred attach. The deferred attached actually has to be done when
doing DMA mapping for devices to work.
There may be a better way to do this be, for example, consulting the
context entry table and only deferring attach if there is a persisted
context table entry for this device.
---
drivers/iommu/dma-iommu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index e5d087bd6da1..76f916848f48 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -1750,7 +1750,7 @@ void iommu_dma_compose_msi_msg(struct msi_desc *desc, struct msi_msg *msg)
static int iommu_dma_init(void)
{
- if (is_kdump_kernel())
+ if (is_kdump_kernel() || liveupdate)
static_branch_enable(&iommu_deferred_attach_enabled);
return iova_cache_get();
--
2.40.1
