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tty: Fix USB kref leak
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>
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@ -281,6 +281,7 @@ static void serial_close(struct tty_struct *tty, struct file *filp)
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if (tty->driver_data)
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tty->driver_data = NULL;
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tty_port_tty_set(&port->port, NULL);
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tty_kref_put(tty);
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}
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}
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