[WATCHDOG] use ENOTTY instead of ENOIOCTLCMD in ioctl()

Return ENOTTY instead of ENOIOCTLCMD in user-visible ioctl() results

The watchdog drivers used to return ENOIOCTLCMD for bad ioctl() commands.
ENOIOCTLCMD should not be visible by the user, so use ENOTTY instead.

Signed-off-by: Samuel Tardieu <sam@rfc1149.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/char/watchdog/softdog.c b/drivers/char/watchdog/softdog.c
index ef8da517545a..4067e1f8a368 100644
--- a/drivers/char/watchdog/softdog.c
+++ b/drivers/char/watchdog/softdog.c
@@ -203,7 +203,7 @@ static int softdog_ioctl(struct inode *inode, struct file *file,
         };
         switch (cmd) {
                 default:
-                        return -ENOIOCTLCMD;
+                        return -ENOTTY;
                 case WDIOC_GETSUPPORT:
                         return copy_to_user(argp, &ident,
                                 sizeof(ident)) ? -EFAULT : 0;