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serial: pch_uart: fix tty-kref leak in dma-rx path

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Fix tty_kref leak when tty_buffer_request room fails in dma-rx path.

Note that the tty ref isn't really needed anymore, but as the leak has
always been there, fixing it before removing should makes it easier to
backport the fix.

Cc: stable@vger.kernel.org
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2013-09-10 12:50:50 +02:00 committed by Greg Kroah-Hartman
parent fc0919c68c
commit 19b85cfb19
1 changed files with 2 additions and 1 deletions
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3
drivers/tty/serial/pch_uart.c
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@ -685,11 +685,12 @@ static int dma_push_rx(struct eg20t_port *priv, int size)
dev_warn(port->dev, "Rx overrun: dropping %u bytes\n",
size - room);
if (!room)
return room;
goto out;
tty_insert_flip_string(tport, sg_virt(&priv->sg_rx), size);
port->icount.rx += room;
out:
tty_kref_put(tty);
return room;