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serial: sh-sci: Remove timer on shutdown of port

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This prevents DMA timer timeout that can trigger after the port has
been closed.

Signed-off-by: Aleksandar Mitev <amitev@visteon.com>
[geert: Move del_timer_sync() outside spinlock to avoid circular locking
        dependency between rx_timer_fn() and del_timer_sync()]
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Aleksandar Mitev 2015-09-18 13:08:28 +02:00 committed by Greg Kroah-Hartman
parent 0e5c4b4d15
commit 9ab7655660
1 changed files with 8 additions and 0 deletions
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8
drivers/tty/serial/sh-sci.c
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@ -1810,6 +1810,14 @@ static void sci_shutdown(struct uart_port *port)
sci_stop_tx(port);
spin_unlock_irqrestore(&port->lock, flags);
#ifdef CONFIG_SERIAL_SH_SCI_DMA
if (s->chan_rx) {
dev_dbg(port->dev, "%s(%d) deleting rx_timer\n", __func__,
port->line);
del_timer_sync(&s->rx_timer);
}
#endif
sci_free_dma(port);
sci_free_irq(s);
}