drm/amdgpu: rework amdgpu_userq_wait_ioctl v4

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Lockdep was complaining about a number of issues here. Especially lock
inversion between syncobj, dma_resv and copying things into userspace.

Rework the functionality. Split it up into multiple functions,
consistenly use memdup_array_user(), fix the lock inversions and a few
more bugs in error handling.

v2: drop the dma_fence leak fix, turned out that was actually correct,
    just not well documented. Apply some more cleanup suggestion from
    Tvrtko.
v3: rebase on already done cleanups
v4: add missing dma_fence_put() in error path.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Sunil Khatri <sunil.khatri@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Christian König 2026-01-29 12:29:26 +01:00 • committed by Alex Deucher

parent 2c192b06f1

commit a1371d9f0e

1 changed files with 323 additions and 259 deletions

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drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c

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