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tty: Fix USB kref leak

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When we close we must clear the extra reference we got when we read
port->tty. Setting the port tty NULL will clear the kref held by the driver
but not the one we obtained ourselves while doing the lookup.

Signed-off-by: Alan Cox <alan@redhat.com>
Tested-by: Helge Hafting <helge.hafting@aitel.hist.no>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox 2008-10-30 15:54:12 +00:00 committed by Linus Torvalds
parent 0fb7f4f0ce
commit fce4877a67
1 changed files with 1 additions and 0 deletions
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1
drivers/usb/serial/usb-serial.c
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@ -281,6 +281,7 @@ static void serial_close(struct tty_struct *tty, struct file *filp)
if (tty->driver_data)
tty->driver_data = NULL;
tty_port_tty_set(&port->port, NULL);
tty_kref_put(tty);
}
}