TTY: unify pty_install fail path handling

Change it so that we call the deinit functions at one place at the end
of the function (by gotos). And while at it use some sane label names.

This is a preparation for the deinitialization of tty in the next
patch.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index 210774726add12f9de8ef0c280360201b6791331..f5119184259c3cb5732101d6def0cfd5e221280d 100644 (file)
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -295,8 +295,8 @@ static int pty_install(struct tty_driver *driver, struct tty_struct *tty)
                return -ENOMEM;
        if (!try_module_get(driver->other->owner)) {
                /* This cannot in fact currently happen */
-               free_tty_struct(o_tty);
-               return -ENOMEM;
+               retval = -ENOMEM;
+               goto err_free_tty;
        }
        initialize_tty_struct(o_tty, driver->other, idx);
 
@@ -304,13 +304,11 @@ static int pty_install(struct tty_driver *driver, struct tty_struct *tty)
           the easy way .. */
        retval = tty_init_termios(tty);
        if (retval)
-               goto free_mem_out;
+               goto err_module_put;
 
        retval = tty_init_termios(o_tty);
-       if (retval) {
-               tty_free_termios(tty);
-               goto free_mem_out;
-       }
+       if (retval)
+               goto err_free_termios;
 
        /*
         * Everything allocated ... set up the o_tty structure.
@@ -327,10 +325,13 @@ static int pty_install(struct tty_driver *driver, struct tty_struct *tty)
        tty->count++;
        driver->ttys[idx] = tty;
        return 0;
-free_mem_out:
+err_free_termios:
+       tty_free_termios(tty);
+err_module_put:
        module_put(o_tty->driver->owner);
+err_free_tty:
        free_tty_struct(o_tty);
-       return -ENOMEM;
+       return retval;
 }
 
 static int pty_bsd_ioctl(struct tty_struct *tty,