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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 <g.liakhovetski@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Guennadi Liakhovetski 2013-12-10 14:54:47 +01:00 committed by Greg Kroah-Hartman
parent 30ae585918
commit c25a1ad707
1 changed files with 2 additions and 0 deletions
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2
drivers/tty/serial/amba-pl011.c
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@ -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;