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Commit 1d3db608 authored by Muhammad Hamza Farooq's avatar Muhammad Hamza Farooq Committed by Greg Kroah-Hartman
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serial: sh-sci: Call dma_async_issue_pending when transaction completes 



dmaengine_submit() will not start the DMA operation, it merely adds
it to the pending queue.  If the queue is no longer running, it won't be
restarted until dma_async_issue_pending() is called.

Signed-off-by: default avatarMuhammad Hamza Farooq <mfarooq@visteon.com>
[geert: Add more description]
Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 371cfed3

drivers/tty/serial/sh-sci.c

+3 −0
Original line number Diff line number Diff line
@@ -1104,6 +1104,7 @@ static void sci_rx_dma_release(struct sci_port *s, bool enable_pio) 
static void sci_dma_rx_complete(void *arg)

{

	struct sci_port *s = arg;

	struct dma_chan *chan = s->chan_rx;

	struct uart_port *port = &s->port;

	struct dma_async_tx_descriptor *desc;

	unsigned long flags;
@@ -1137,6 +1138,8 @@ static void sci_dma_rx_complete(void *arg) 


	s->active_rx = s->cookie_rx[!active];



	dma_async_issue_pending(chan);



	dev_dbg(port->dev, "%s: cookie %d #%d, new active cookie %d\n",

		__func__, s->cookie_rx[active], active, s->active_rx);

	spin_unlock_irqrestore(&port->lock, flags);