drm/amdkfd: fix QID bit leak in pqm_create_queue()

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When MES is enabled and amdgpu_amdkfd_alloc_kernel_mem() fails during
the first queue creation for a process, pqm_create_queue() returns
early via 'return retval' without going through the err_create_queue
cleanup label.

This means clear_bit(*qid, pqm->queue_slot_bitmap) is never called,
leaving the reserved QID bit permanently set in queue_slot_bitmap.
Over time this leaks QID slots, potentially exhausting all available
queue slots.

Fix this by replacing 'return retval' with 'goto err_allocate_pqn'
so that clear_bit() is always called on the error path without
touching the uninitialized pqn pointer.

AILIKFD-813

Reported-by: Deucher, Alexander <alexander.deucher@amd.com>
Signed-off-by: Vladimir Marioukhine <Vladimir.Marioukhine@amd.com>
Reviewed-by: Kent Russell <kent.russell@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Vladimir Marioukhine 2026-07-20 11:53:30 -04:00 • committed by Alex Deucher

parent 66f46209fd

commit a107f74c38

1 changed files with 1 additions and 1 deletions

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

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