From: Itai Levi <[email protected]>
I am suggesting a patch to atmel_srial.c.
It fixes the following problem, related to hardware flow control
(CTS/RTS): Transmitting while CTS line is asserted in DMA mode, due to
not checking for tx-stopped condition.
We found these problems while testing the UARTs with hardware
flow-control.
Signed-off-by: Haavard Skinnemoen <[email protected]>
---
drivers/serial/atmel_serial.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/serial/atmel_serial.c b/drivers/serial/atmel_serial.c
index d5efd6c..89362d7 100644
--- a/drivers/serial/atmel_serial.c
+++ b/drivers/serial/atmel_serial.c
@@ -579,7 +579,7 @@ static void atmel_tx_dma(struct uart_port *port)
/* disable PDC transmit */
UART_PUT_PTCR(port, ATMEL_PDC_TXTDIS);
- if (!uart_circ_empty(xmit)) {
+ if (!uart_circ_empty(xmit) && !uart_tx_stopped(port)) {
dma_sync_single_for_device(port->dev,
pdc->dma_addr,
pdc->dma_size,
--
1.5.6.3