drm/amdgpu: Fix runtime PM leak in amdgpu_debugfs_test_ib_show()

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amdgpu_debugfs_test_ib_show() resumes the device with
pm_runtime_get_sync() before taking the reset domain semaphore with
down_write_killable().  If the write lock acquisition is interrupted,
the function returns without calling pm_runtime_put_autosuspend(),
leaking the runtime PM reference acquired for the device and keeping
the GPU awake.

Drop the runtime PM reference on the interrupted down_write_killable()
error path before returning.

Fixes: 6049db43d6 ("drm/amdgpu: change reset lock from mutex to rw_semaphore")
Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit ec30a576c2)
Cc: stable@vger.kernel.org

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Wentao Liang 2026-09-16 09:58:05 +00:00 • committed by Alex Deucher

parent b4f7b4459b

commit 2b86ab1bd6

1 changed files with 3 additions and 1 deletions

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

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