The check to set identity map for tylersburg is done too late. It needs to be done before the check for identity_map domain is done.
To: Joerg Roedel <[email protected]> To: David Woodhouse <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: Ashok Raj <[email protected]> Signed-off-by: Ashok Raj <[email protected]> Reported-by: Yunhong Jiang <[email protected]> --- drivers/iommu/intel-iommu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 8a18525..23eead3 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -3325,13 +3325,14 @@ static int __init init_dmars(void) iommu_identity_mapping |= IDENTMAP_GFX; #endif + check_tylersburg_isoch(); + if (iommu_identity_mapping) { ret = si_domain_init(hw_pass_through); if (ret) goto free_iommu; } - check_tylersburg_isoch(); /* * If we copied translations from a previous kernel in the kdump -- 2.7.4
