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The source and destination addresses are masked to low 40 bits only. Make sure that the input params don't cross that; it would mean a bug somewhere in the caller side. Silently truncating values could cause unexpected behaviour, but no device even has that much memory. Also rename the src_buf and dst_buf to src_paddr and dst_paddr to emphasize that the addresses are gpu physical. Jira NVGPU-5172 Change-Id: I30653bf93791517991d04e4ba43220b5b541f581 Signed-off-by: Konsta Hölttä <kholtta@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2402031 Reviewed-by: automaticguardword <automaticguardword@nvidia.com> Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: svc-mobile-misra <svc-mobile-misra@nvidia.com> Reviewed-by: Deepak Nibade <dnibade@nvidia.com> Reviewed-by: Alex Waterman <alexw@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>