Le 16/04/2015 16:58, Ludovic Desroches a écrit : > Maxburst was not set when doing the dma slave configuration. This value > is checked by the recently introduced xdmac. It causes an error when > doing the slave configuration and so prevents from using dma. > > Signed-off-by: Ludovic Desroches <ludovic.desroches@xxxxxxxxx> > Cc: <stable@xxxxxxxxxxxxxxx> # 3.12 and later Indeed, thanks! Acked-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxx> > --- > drivers/tty/serial/atmel_serial.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c > index 4e959c4..6afce7e 100644 > --- a/drivers/tty/serial/atmel_serial.c > +++ b/drivers/tty/serial/atmel_serial.c > @@ -880,6 +880,7 @@ static int atmel_prepare_tx_dma(struct uart_port *port) > config.direction = DMA_MEM_TO_DEV; > config.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; > config.dst_addr = port->mapbase + ATMEL_US_THR; > + config.dst_maxburst = 1; > > ret = dmaengine_slave_config(atmel_port->chan_tx, > &config); > @@ -1059,6 +1060,7 @@ static int atmel_prepare_rx_dma(struct uart_port *port) > config.direction = DMA_DEV_TO_MEM; > config.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; > config.src_addr = port->mapbase + ATMEL_US_RHR; > + config.src_maxburst = 1; > > ret = dmaengine_slave_config(atmel_port->chan_rx, > &config); > -- Nicolas Ferre -- 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
