extmod/nimble: Add timeout to deinit. #17247
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andrewleech
commented
May 6, 2025
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Should extend this to more closely match the init functionality with regard to raising exceptions on failure |
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dpgeorge
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May 20, 2025
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If the BLE radio stops responding before deinit is called the function can get stuck waiting for an event that is never received, particularly if the radio is external or on a separate core. This commit adds a timeout, similar to the timeout already used in the init function. Updated for nimble, btstack, esp32 and zephyr bindings. Signed-off-by: Andrew Leech <andrew.leech@planetinnovation.com.au>
dpgeorge
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Jun 3, 2025
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Summary
If the BLE radio stops responding before deinit is called the function can get stuck waiting for an event that is never received, particularly if the radio is external or on a separate core.
This PR adds a timeout, similar to the timeout already used in the init function. That init function timeout was also
simplified as part of this change.
Relates to #17246
Testing
This has been tested on a stm32wb55 where the deinit was intermittently locking up waiting for the state to change.
This happened on a semi-regular basis on an application automated test suite which was running through hundreds of cycles over a number of hours.
Trade-offs and Alternatives
The main alternative to this is relying on watchdog to break the unit out of the infinite C loop once the failure occurs, but this is not appropriate for all applications.