drivers: serial: stm32 UART driver do not start Rx timer if null
This commit is optimizing the uart isr execution to avoid starting
the Rx timeout if it is null. In anycase the async_timer_start
function is checking the tiemout value. This will just save some
execution lines.
Signed-off-by: Francois Ramu <francois.ramu@st.com>
diff --git a/drivers/serial/uart_stm32.c b/drivers/serial/uart_stm32.c
index 228e916..f2b258a 100644
--- a/drivers/serial/uart_stm32.c
+++ b/drivers/serial/uart_stm32.c
@@ -1024,12 +1024,12 @@
LOG_DBG("idle interrupt occurred");
- /* Start the RX timer */
- async_timer_start(&data->dma_rx.timeout_work,
- data->dma_rx.timeout);
-
if (data->dma_rx.timeout == 0) {
uart_stm32_dma_rx_flush(dev);
+ } else {
+ /* Start the RX timer not null */
+ async_timer_start(&data->dma_rx.timeout_work,
+ data->dma_rx.timeout);
}
} else if (LL_USART_IsEnabledIT_TC(config->usart) &&
LL_USART_IsActiveFlag_TC(config->usart)) {
