Message ID | 20160413064431.GF8092@mwanda (mailing list archive) |
---|---|
State | Not Applicable |
Headers | show |
diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c index e46d628..325747a 100644 --- 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;
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>