Hello wentalou,
The patch 2c11ee6ae553: "drm/amdgpu: tighten gpu_recover in
mailbox_flr to avoid duplicate recover in sriov" from Jan 30, 2019,
leads to the following static checker warning:
drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c:270 xgpu_ai_mailbox_flr_work()
warn: impossible condition '(amdgpu_lockup_timeout == ((~0 >> 1))) =>
(s32min-s32max == s64max)'
drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c
262 flr_done:
263 if (locked) {
264 adev->in_gpu_reset = 0;
265 mutex_unlock(&adev->lock_reset);
266 }
267
268 /* Trigger recovery for world switch failure if no TDR */
269 if (amdgpu_device_should_recover_gpu(adev)
--> 270 && amdgpu_lockup_timeout == MAX_SCHEDULE_TIMEOUT)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
amdgpu_lockup_timeout is an int and I'm not sure if that's what you
want to test. MAX_SCHEDULE_TIMEOUT is LONG_MAX.
271 amdgpu_device_gpu_recover(adev, NULL);
272 }
regards,
dan carpenter
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