xiaoxiang781216 commented on a change in pull request #2343:
URL: https://github.com/apache/incubator-nuttx/pull/2343#discussion_r526851860
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File path: drivers/serial/serial.c
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@@ -924,6 +924,20 @@ static ssize_t uart_read(FAR struct file *filep, FAR char
*buffer, size_t buflen
/* Re-enable UART Rx interrupts */
uart_enablerxint(dev);
+
+ /* Check again if the RX buffer is empty. The UART driver
Review comment:
but line 922 already disable CPU receiving any interrupt before enable
rx irq. I am curious why the irq can still dispatch to your interrupt handler.
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