tty: hvc_console: silence unintialized variable warning

If ->get_char() returns a negative error code and that can mean that
"ch" is uninitialized.  The callers of this function expect NO_POLL_CHAR
on error so let's return that.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c
index 209dad8..ce86487 100644 (file)
--- a/drivers/tty/hvc/hvc_console.c
+++ b/drivers/tty/hvc/hvc_console.c
@@ -814,7 +814,7 @@ static int hvc_poll_get_char(struct tty_driver *driver, int line)
 
        n = hp->ops->get_chars(hp->vtermno, &ch, 1);
 
-       if (n == 0)
+       if (n <= 0)
                return NO_POLL_CHAR;
 
        return ch;