TTY: remove unneeded tty->index checks

Checking if tty->index is in bounds is not needed. The tty has the
index set in the initial open. This is done in get_tty_driver. And it
can be only in interval <0,driver->num).

So remove the tests which check exactly this interval. Some are
left untouched as they check against the current backing device count.
(Leaving apart that the check is racy in most of the cases.)

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/tty/rocket.c b/drivers/tty/rocket.c
index b088e1ea4331..777d5f9cf6cc 100644
--- a/drivers/tty/rocket.c
+++ b/drivers/tty/rocket.c
@@ -892,12 +892,12 @@ static int rp_open(struct tty_struct *tty, struct file *filp)
 {
         struct r_port *info;
         struct tty_port *port;
-        int line = 0, retval;
+        int retval;
         CHANNEL_t *cp;
         unsigned long page;
 
-        line = tty->index;
-        if (line < 0 || line >= MAX_RP_PORTS || ((info = rp_table[line]) == NULL))
+        info = rp_table[tty->index];
+        if (info == NULL)
                 return -ENXIO;
         port = &info->port;