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drm/amdgpu/userq: ignore duplicate BO locks in userq signal ioctl

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amdgpu_userq_signal_ioctl() calls drm_exec_init() without
DRM_EXEC_IGNORE_DUPLICATES. When the same GEM object appears more than
once across the read/write BO handle lists submitted by userspace,
drm_exec_lock_obj() returns -EALREADY the second time it locks that
object, which aborts the ioctl instead of treating the repeat as a
no-op.

Add DRM_EXEC_IGNORE_DUPLICATES so duplicate objects are silently
skipped on the second lock attempt, matching the intended semantics of
locking a set of (possibly overlapping) BOs before publishing a fence
on them.

Signed-off-by: Sunil Khatri <sunil.khatri@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Sunil Khatri 2026-08-13 13:59:07 +05:30 committed by Alex Deucher
parent ffdb7a8104
commit 3438e964c9
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c
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@ -537,7 +537,7 @@ int amdgpu_userq_signal_ioctl(struct drm_device *dev, void *data,
* amdgpu_userq_ensure_ev_fence() can't be called while holding the resv
* locks.
*/
drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT,
drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT | DRM_EXEC_IGNORE_DUPLICATES,
(num_read_bo_handles + num_write_bo_handles));
drm_exec_until_all_locked(&exec) {