From 759e510c28442e4d7732b963eca2bdec97a6e744 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Mon, 26 Mar 2018 13:54:47 -0600
Subject: [PATCH] Per Matias Edlund: I recently used the tcflush function and
found that it failed with ENOTTY. The reason is that the TCFLSH case in the
function uart_ioctl in the file drivers/serial/serial.c does not update the
ret value." On success, the TCFLSH IOCTL logic needs to explicitly set the
return value (ret) to zero.
---
drivers/serial/serial.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/serial/serial.c b/drivers/serial/serial.c
index 1f6ab0fad2..d63f4837cb 100644
--- a/drivers/serial/serial.c
+++ b/drivers/serial/serial.c
@@ -1339,6 +1339,7 @@ static int uart_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
}
leave_critical_section(flags);
+ ret = 0;
}
break;
--
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