Hello Suravee Suthikulpanit, This is a semi-automatic email about new static checker warnings.
The patch 26e495f34107: "iommu/amd: Restore IRTE.RemapEn bit after programming IRTE" from Sep 3, 2020, leads to the following Smatch complaint: drivers/iommu/amd/iommu.c:3870 amd_iommu_deactivate_guest_mode() warn: variable dereferenced before check 'entry' (see line 3867) drivers/iommu/amd/iommu.c 3866 struct irq_cfg *cfg = ir_data->cfg; 3867 u64 valid = entry->lo.fields_remap.valid; ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The patch adds a new dereference 3868 3869 if (!AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir) || 3870 !entry || !entry->lo.fields_vapic.guest_mode) ^^^^^^ before "entry" has been checked for NULL. 3871 return 0; 3872 regards, dan carpenter _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu