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TTY: unify pty_unix98_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>
This commit is contained in:
Jiri Slaby 2011-03-23 10:48:34 +01:00 committed by Greg Kroah-Hartman
parent 8a1b8d70a0
commit c18d77aa00
1 changed files with 7 additions and 7 deletions
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14
drivers/tty/pty.c
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@ -560,20 +560,19 @@ static int pty_unix98_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;
goto err_free_tty;
}
initialize_tty_struct(o_tty, driver->other, idx);
tty->termios = kzalloc(sizeof(struct ktermios[2]), GFP_KERNEL);
if (tty->termios == NULL)
goto free_mem_out;
goto err_free_mem;
*tty->termios = driver->init_termios;
tty->termios_locked = tty->termios + 1;
o_tty->termios = kzalloc(sizeof(struct ktermios[2]), GFP_KERNEL);
if (o_tty->termios == NULL)
goto free_mem_out;
goto err_free_mem;
*o_tty->termios = driver->other->init_termios;
o_tty->termios_locked = o_tty->termios + 1;
@ -592,11 +591,12 @@ static int pty_unix98_install(struct tty_driver *driver, struct tty_struct *tty)
tty->count++;
pty_count++;
return 0;
free_mem_out:
err_free_mem:
kfree(o_tty->termios);
module_put(o_tty->driver->owner);
free_tty_struct(o_tty);
kfree(tty->termios);
module_put(o_tty->driver->owner);
err_free_tty:
free_tty_struct(o_tty);
return -ENOMEM;
}