d5cfc8a7d7
Select RELATED before HAL startup and create oFono’s private state directory. A controlled modem restart recovered network registration without rebooting the phone; two persistent boots and native UI checks passed. The IMS firmware watchdog root cause remains unresolved.
35 lines
1.3 KiB
Python
35 lines
1.3 KiB
Python
#!/usr/bin/env python3
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# SPDX-License-Identifier: MPL-2.0
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"""Keep a Sargo modem fault from immediately restarting the whole phone."""
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from pathlib import Path
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import time
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def configure(devices=Path('/sys/bus/msm_subsys/devices')):
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matches = [p.parent for p in devices.glob('*/name')
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if p.read_text().strip() == 'modem']
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if len(matches) != 1:
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raise RuntimeError('Expected one Sargo modem subsystem')
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level = matches[0]/'restart_level'
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previous = level.read_text().strip()
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if previous not in ('SYSTEM', 'RELATED'):
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raise RuntimeError('Unsupported modem restart policy: '+previous)
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# This kernel supports coupled subsystem recovery. Firmware failures and
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# unsuccessful recovery remain visible in the kernel log; do not suppress
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# its watchdog or crash accounting.
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if previous != 'RELATED':
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level.write_text('RELATED\n')
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if level.read_text().strip() != 'RELATED':
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raise RuntimeError('Modem restart policy was not applied')
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print('Sargo modem recovery: '+previous+' -> RELATED', flush=True)
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if __name__ == '__main__':
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for attempt in range(30):
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try:
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configure()
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break
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except (FileNotFoundError, RuntimeError):
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if attempt == 29:
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raise
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time.sleep(1)
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