cpu/esp32: fix esp_wifi stability problem by placing wdt_hal_* functions in IRAM#21980
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benpicco merged 1 commit intoRIOT-OS:masterfrom Jan 12, 2026
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Platform: ESP
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Type: bug
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Jan 12, 2026
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Contribution description
The PR fixes an issue caused by missing entries for
wdt_hal_*functions insections.ldfiles for ESP32-S3, ESP32-C6 and ESP32-H2.wdt_hal_*functions of the IDF have to be placed in IRAM to avoid crashes whenwdt_hal_*functions are used while SPI Flash Cache is disabled. For ESP32-S3, ESP32-C6 and ESP32-H2, these functions were placed in IROM due to missing entries insections.ldfiles. Especially on ESP32-S3, this led to crashes while connecting to a WiFi AP.The issue was found while investigating issue #21923.
Testing procedure
Use any ESP32-S3 board and flash the GNRC networking example with enabled
esp_wifimodule, for exampleWithout this PR, the ESP32-S3 board mostly hangs after reset while connecting to the WiFi AP. With the PR connecting to the WiFi AP should work stable.
Issues/PRs references