From: Muhammad Hamza Farooq <mfarooq@xxxxxxxxxxx>
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: Muhammad Hamza Farooq <mfarooq@xxxxxxxxxxx>
[geert: Add more description]
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
v4:
- New.
---
drivers/tty/serial/sh-sci.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 5dcd8b382e9053f4..84c15152e111b084 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -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);
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe linux-serial" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
