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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>
This commit is contained in:
Jiri Slaby 2011-03-23 10:48:33 +01:00 committed by Greg Kroah-Hartman
parent d554350375
commit 8a1b8d70a0
1 changed files with 10 additions and 9 deletions
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19
drivers/tty/pty.c
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@ -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,