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RP2/machine_uart.c: Fix poll ioctl. #7552

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RP2/machine_uart.c: Fix poll ioctl. #7552

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2 changes: 1 addition & 1 deletion ports/rp2/machine_uart.c
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Original file line number Diff line number Diff line change
Expand Up @@ -477,7 +477,7 @@ STATIC mp_uint_t machine_uart_ioctl(mp_obj_t self_in, mp_uint_t request, mp_uint
if (request == MP_STREAM_POLL) {
uintptr_t flags = arg;
ret = 0;
if ((flags & MP_STREAM_POLL_RD) && ringbuf_avail(&self->read_buffer) > 0) {
if ((flags & MP_STREAM_POLL_RD) && (uart_is_readable(self->uart) || ringbuf_avail(&self->read_buffer) > 0)) {
ret |= MP_STREAM_POLL_RD;
}
if ((flags & MP_STREAM_POLL_WR) && ringbuf_free(&self->write_buffer) > 0) {
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