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drivers: uart_nrfx_uarte: Fix RX auto disabling routine

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This is a follow-up to commit 11bbdb030d.

When RX is automatically disabled because all provided RX buffers have
been filled up, the rx_enabled flag needs to be cleared, otherwise it
will be impossible to enable RX again.

Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>
This commit is contained in:
Andrzej Głąbek 2022-02-03 15:50:43 +01:00 committed by Anas Nashif
parent 956d49ad66
commit c80589af56
1 changed files with 10 additions and 1 deletions
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11
drivers/serial/uart_nrfx_uarte.c
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@ -1330,7 +1330,16 @@ static void rxto_isr(const struct device *dev)
notify_rx_buf_release(dev, &data->async->rx_buf, true);
notify_rx_buf_release(dev, &data->async->rx_next_buf, true);
if (!data->async->rx_enabled) {
/* If the rx_enabled flag is still set at this point, it means that
* RX is being disabled because all provided RX buffers have been
* filled up. Clear the flag then, so that RX can be enabled again.
*
* If the flag is already cleared, it means that RX was aborted by
* a call to uart_rx_disable() and data from FIFO should be discarded.
*/
if (data->async->rx_enabled) {
data->async->rx_enabled = false;
} else {
(void)rx_flush(dev, NULL, 0);
}