fix(ppp): Fix PPP.end() causing exception #11987
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Test Results 76 files 76 suites 16m 44s ⏱️ Results for commit 87a8345. ♻️ This comment has been updated with latest results. |
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Pull Request Overview
This PR addresses a resource cleanup ordering issue in the PPP library's end() method and adds a new function to clear peripheral destructor callbacks. The key change is moving the esp_modem_destroy(_dce) call to occur earlier in the teardown sequence and introducing perimanClearBusDeinit() to temporarily disable bus deinit callbacks during cleanup.
- Modem destruction moved before pin cleanup to ensure proper resource release order
- New
perimanClearBusDeinit()function added to prevent recursiveend()calls during cleanup - Pin bus clearing now happens with disabled deinit callbacks, then callbacks are re-registered
Reviewed Changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.
| File | Description |
|---|---|
| libraries/PPP/src/PPP.cpp | Reordered modem destruction to occur earlier; added calls to clear/restore bus deinit callbacks around pin cleanup |
| cores/esp32/esp32-hal-periman.h | Added declaration for new perimanClearBusDeinit() function |
| cores/esp32/esp32-hal-periman.c | Implemented perimanClearBusDeinit() using an empty callback function to prevent callback execution |
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Memory usage test (comparing PR against master branch)The table below shows the summary of memory usage change (decrease - increase) in bytes and percentage for each target.
Click to expand the detailed deltas report [usage change in BYTES]
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@me-no-dev Not directly related. Since you are refactor the PPP driver, is it possible to silence this non critical warnings? |
P-R-O-C-H-Y
approved these changes
Nov 6, 2025
lucasssvaz
approved these changes
Nov 6, 2025
me-no-dev
added
Status: Pending Merge
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This pull request introduces improvements to the peripheral bus deinitialization process and enhances the cleanup logic in the PPP (Point-to-Point Protocol) library. The main focus is on providing a way to clear and reset bus deinit callbacks, ensuring proper resource management and preventing potential issues when the PPP connection is terminated.
Enhancements to peripheral bus deinit management:
perimanClearBusDeinitfunction and its declaration to allow clearing the deinit callback for a specific bus type, replacing it with a no-op function. This helps prevent unintended cleanup actions after the bus is no longer in use. [1] [2]PPP library cleanup improvements:
PPPClass::end()to callperimanClearBusDeinitfor all PPP-related bus types (PPP_TX,PPP_RX,PPP_RTS,PPP_CTS), ensuring that their deinit callbacks are reset during PPP shutdown._dcemodem object earlier in thePPPClass::end()cleanup process for better resource management.perimanSetBusDeinitwithPPPClass::pppDetachBus. This prepares the system for the next PPP session.Fixes: #11914