[GitHub] [incubator-nuttx] jlaitine commented on a change in pull request #5161: arch/risc-v/src/mpfs/mpfs_serial.c: Correct setting of nbits

[GitBox <gi...@apache.org>]

jlaitine commented on a change in pull request #5161:
URL: https://github.com/apache/incubator-nuttx/pull/5161#discussion_r778394624



##########
File path: arch/risc-v/src/mpfs/mpfs_serial.c
##########
@@ -907,10 +907,28 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
 
         priv->stopbits2 = (termiosp->c_cflag & CSTOPB) != 0;
 
-        priv->bits = (termiosp->c_cflag & CS5) ? 5 : 0;
-        priv->bits = (termiosp->c_cflag & CS6) ? 6 : 0;
-        priv->bits = (termiosp->c_cflag & CS7) ? 7 : 0;
-        priv->bits = (termiosp->c_cflag & CS8) ? 8 : 0;
+        switch (termiosp->c_cflag & CSIZE)
+          {
+          case CS5:
+            priv->bits = 5;
+            break;
+
+          case CS6:
+            priv->bits = 6;
+            break;
+
+          case CS7:
+            priv->bits = 7;
+            break;
+
+          case CS8:
+            priv->bits = 8;
+            break;
+
+          default:
+            priv->bits = 0;
+            ret = -EINVAL;
+          }

Review comment:
       This makes sense; calling up_set_format wouldn't do any good if the previous setting fails.




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