drm/buddy: fix issue that force_merge cannot free all roots

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[ Upstream commit 467dce3817 ]

If buddy manager have more than one roots and each root have sub-block
need to be free. When drm_buddy_fini called, the first loop of
force_merge will merge and free all of the sub block of first root,
which offset is 0x0 and size is biggest(more than have of the mm size).
In subsequent force_merge rounds, if we use 0 as start and use remaining
mm size as end, the block of other roots will be skipped in
__force_merge function. It will cause the other roots can not be freed.

Solution: use roots' offset as the start could fix this issue.

Signed-off-by: Lin.Cao <lincao12@amd.com>
Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241226070116.309290-1-Arunpravin.PaneerSelvam@amd.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Lin.Cao 2024-12-26 12:31:15 +05:30 • committed by Greg Kroah-Hartman

parent 1351052877

commit aa52c70ae1

1 changed files with 3 additions and 2 deletions

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drivers/gpu/drm/drm_buddy.c

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