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linux-sg2042
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staging: fwserial: fix resource leak 

This patch fixes the leak, which was present in fwserial driver in the
init function. In case the tty driver allocation failed the function
returned error, leaving debugfs entry in the filesystem.

To fix the issue additional error label was added, so that the code will
jump to it in case of allocation failure, and free debugfs entries.

Signed-off-by: Vladimirs Ambrosovs <rodriguez.twister@gmail.com>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Vladimirs Ambrosovs 2015-05-25 23:22:44 +03:00 committed by Greg Kroah-Hartman
parent 71d667b800
commit 904998bf54
1 changed files with 4 additions and 1 deletions
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5
drivers/staging/fwserial/fwserial.c
View File

@ -2815,13 +2815,14 @@ static int __init fwserial_init(void)
/* num_ttys/num_ports must not be set above the static alloc avail */
if (num_ttys + num_loops > MAX_CARD_PORTS)
num_ttys = MAX_CARD_PORTS - num_loops;
num_ports = num_ttys + num_loops;
fwtty_driver = tty_alloc_driver(MAX_TOTAL_PORTS, TTY_DRIVER_REAL_RAW
| TTY_DRIVER_DYNAMIC_DEV);
if (IS_ERR(fwtty_driver)) {
err = PTR_ERR(fwtty_driver);
return err;
goto remove_debugfs;
}
fwtty_driver->driver_name = KBUILD_MODNAME;
@ -2923,7 +2924,9 @@ unregister_driver:
tty_unregister_driver(fwtty_driver);
put_tty:
put_tty_driver(fwtty_driver);
remove_debugfs:
debugfs_remove_recursive(fwserial_debugfs);
return err;
}