From c25a1ad7077ab9914bad1374df8b9cdb9bf5f0ad Mon Sep 17 00:00:00 2001 From: Guennadi Liakhovetski Date: Tue, 10 Dec 2013 14:54:47 +0100 Subject: [PATCH] serial: pl011: fix fall back from DMA to interrupt mode When falling back from DMA to interrupt mode the receive interrupt has to be re-enabled to catch new incoming data. Signed-off-by: Guennadi Liakhovetski Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/amba-pl011.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index ea6c2a3798ff..d58783d364e3 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -967,6 +967,8 @@ static void pl011_dma_rx_poll(unsigned long args) spin_lock_irqsave(&uap->port.lock, flags); pl011_dma_rx_stop(uap); + uap->im |= UART011_RXIM; + writew(uap->im, uap->port.membase + UART011_IMSC); spin_unlock_irqrestore(&uap->port.lock, flags); uap->dmarx.running = false;