[GitHub] [incubator-nuttx] xiaoxiang781216 commented on a diff in pull request #7014: net/netdev: correct return value of SIOCGIFFLAGS/SIOCGIFCOUNT

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

xiaoxiang781216 commented on code in PR #7014:
URL: https://github.com/apache/incubator-nuttx/pull/7014#discussion_r964017175


##########
net/netdev/netdev_ioctl.c:
##########
@@ -992,6 +996,7 @@ static int netdev_ifr_ioctl(FAR struct socket *psock, int cmd,
 #endif
                 {
                   nerr("Unsupported link layer\n");
+                  ret = -ENOSYS;

Review Comment:
   ditto



##########
net/netdev/netdev_ioctl.c:
##########
@@ -947,6 +950,7 @@ static int netdev_ifr_ioctl(FAR struct socket *psock, int cmd,
 #endif
                 {
                   nerr("Unsupported link layer\n");
+                  ret = -ENOSYS;

Review Comment:
   why change the error code to -ENOSYS? ENOSYS mean OS doesn't support the functionality yet, it isn't good to indicate that netdev hasn't hardware address.



##########
net/netdev/netdev_ioctl.c:
##########
@@ -905,9 +905,12 @@ static int netdev_ifr_ioctl(FAR struct socket *psock, int cmd,
           if (dev)
             {
               req->ifr_flags = dev->d_flags;
+              ret = OK;
+            }
+          else
+            {
+              ret = -ENODEV;

Review Comment:
   let's set ret = -ENODEV at line 640 and remove other places which set ret to -ENODEV



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