Tags: Andymash/Firmware
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BACKPORT of upstream NuttX stm32_serial: fix freezing serial port. Thanks to Jussi Kivilinna https://bitbucket.org/nuttx/nuttx/commits/9169ff6a15fe65ba4af134b470dbf89220274c19 stm32_serial: fix freezing serial port. Serial interrupt enable/disable functions do not disable interrupts and can freeze device when serial interrupt is received while execution is at those functions. Trivially triggered with two or more threads write to regular syslog stream and to emergency stream. In this case, freeze happens because of mismatch of priv->ie (TXEIE == 0) and actually enabled interrupts in USART registers (TXEIE == 1), which leads to unhandled TXE interrupt and causes interrupt storm for USART.
Navigator: Fix RTL command lnd logic for missions The navigator was sending RTL commands in the wrong circumstances leading to a cycle between Navigator and Commander.
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