AlexanderVasiljev commented on a change in pull request #2036:
URL: https://github.com/apache/incubator-nuttx/pull/2036#discussion_r508274491
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File path: drivers/serial/serial.c
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@@ -1761,7 +1771,7 @@ void uart_connected(FAR uart_dev_t *dev, bool connected)
void uart_reset_sem(FAR uart_dev_t *dev)
{
nxsem_reset(&dev->xmitsem, 0);
- nxsem_reset(&dev->recvsem, 0);
+ nxsem_reset(&dev->recvsem, 1);
Review comment:
The close function has already a logic to wait for clearing transmit
buffer. So the close function will block.
/* Prevent blocking if the device is opened with O_NONBLOCK */
if ((filep->f_oflags & O_NONBLOCK) == 0)
{
/* Now we wait for the transmit buffer(s) to clear */
uart_tcdrain(dev, 4 * TICK_PER_SEC);
}
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