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TTY: coalesce fail paths in tty_open 

Move them to the end of the function and use gotos as usual.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jiri Slaby 2011-11-09 21:33:21 +01:00 committed by Greg Kroah-Hartman
parent 5b5e70408f
commit ba5db44895
1 changed files with 17 additions and 15 deletions
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32
drivers/tty/tty_io.c
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@ -1916,27 +1916,20 @@ static int tty_open(struct inode *inode, struct file *filp)
tty = tty_open_current_tty(device, filp);
if (IS_ERR(tty)) {
tty_unlock();
mutex_unlock(&tty_mutex);
tty_free_file(filp);
return PTR_ERR(tty);
retval = PTR_ERR(tty);
goto err_unlock;
} else if (!tty) {
driver = tty_lookup_driver(device, filp, &noctty, &index);
if (IS_ERR(driver)) {
tty_unlock();
mutex_unlock(&tty_mutex);
tty_free_file(filp);
return PTR_ERR(driver);
retval = PTR_ERR(driver);
goto err_unlock;
}
/* check whether we're reopening an existing tty */
tty = tty_driver_lookup_tty(driver, inode, index);
if (IS_ERR(tty)) {
tty_unlock();
mutex_unlock(&tty_mutex);
tty_driver_kref_put(driver);
tty_free_file(filp);
return PTR_ERR(tty);
retval = PTR_ERR(tty);
goto err_unlock;
}
}
@ -1952,8 +1945,8 @@ static int tty_open(struct inode *inode, struct file *filp)
tty_driver_kref_put(driver);
if (IS_ERR(tty)) {
tty_unlock();
tty_free_file(filp);
return PTR_ERR(tty);
retval = PTR_ERR(tty);
goto err_file;
}
tty_add_file(tty, filp);
@ -2013,6 +2006,15 @@ static int tty_open(struct inode *inode, struct file *filp)
tty_unlock();
mutex_unlock(&tty_mutex);
return 0;
err_unlock:
tty_unlock();
mutex_unlock(&tty_mutex);
/* after locks to avoid deadlock */
if (!IS_ERR_OR_NULL(driver))
tty_driver_kref_put(driver);
err_file:
tty_free_file(filp);
return retval;
}