Enabled the "DMA remapping" for my device driver but I still get the "IOMMU detected DMA violation" error

[MJ_STAR]

Hi, I have enabled the DMA remapping for my device driver but I still get the "IOMMU detected DMA violation" error whenever I try to perform any DMA transactions on my PCI device connected via Thunderbolt 3. I have updated the UEFI firmware. The DMA Kernel Protection is ON. The driver shows "DMA remapping policy" enabled. Also, set the group policy 'Disable new DMA devices when this computer is locked' for the BitLocker to "Disabled". Driver Verifier is running. Any idea why still get the error DRIVER_VERIFIER_DMA_VIOLATION? The device get enumerated but it fails on DMA operations. Curiously e

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