xiaoxiang781216 commented on a change in pull request #2036:
URL: https://github.com/apache/incubator-nuttx/pull/2036#discussion_r508252462
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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:
But, if nobody is blocking in the uart_read, dev->recvsem reset to 1
after close, then the next open and then read will wake up immediately with the
empty buffer.
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