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Max Kriegleder
eb92f0f8c8
current_usec() returns a uint64_t, but it used TICK2USEC(timebase) to convert scheduler ticks to microseconds. On 32-bit clock_t builds, TICK2USEC() performs the multiplication in 32-bit arithmetic before the result is widened. With CONFIG_USEC_PER_TICK=10000, this wraps after about 71.6 minutes: UINT32_MAX / 1000000 ~= 4294 seconds After the wrap, up_timer_gettick() can report time near zero again. This can leave absolute watchdog timeouts, such as those used by usleep() / clock_nanosleep(), waiting for a tick value that will not be reached until the 32-bit scheduler counter wraps. Cast timebase to uint64_t before multiplying by USEC_PER_TICK so current_usec() remains monotonic across the 32-bit microsecond boundary. Signed-off-by: Max Kriegleder <max.kriegleder@gmail.com>