drm/amdkfd: Fix error path at svm_migrate_copy_to_ram

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If page migration from device to sys ram fails for some reasons driver needs
release and unlock allocated system pages. To do that driver should use page
physical address, or pfn, then get struct page*. Current driver uses dma
address(for adev) that is not correct with IOMMU enabled, or even in general.

The patch releases and unlocks allocated system pages based on where migration
failed by struct page* of sys ram pages. Also dma_unmap correspodent system
ram pages at error path.

Cc: stable@vger.kernel.org
Signed-off-by: Xiaogang Chen <xiaogang.chen@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Xiaogang Chen 2026-08-23 15:22:54 -05:00 • committed by Alex Deucher

parent 9e8bcfde00

commit 960c4a8069

1 changed files with 30 additions and 15 deletions

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drivers/gpu/drm/amd/amdkfd/kfd_migrate.c

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