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drivers: serial: stm32 UART driver do not start Rx timer if null

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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>
This commit is contained in:
Francois Ramu 2022-08-31 12:13:41 +02:00 • committed by Carles Cufí
commit 0300b34cf0
1 changed files with 4 additions and 4 deletions
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8
drivers/serial/uart_stm32.c
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@ -1024,12 +1024,12 @@ static void uart_stm32_isr(const struct device *dev)
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)) {