diff options
| author | Cyrille Pitchen <cyrille.pitchen@atmel.com> | 2014-12-09 14:31:36 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-01-09 14:20:49 -0800 |
| commit | 1842dc2e29855ef2d8ec2e5ff9f29add7e999ce8 (patch) | |
| tree | 3edaa83675e38a4fba118ac0e612c1ab10f2136f | |
| parent | 1cf6e8fc8341e54f28aad706544a1d50c3a82ddc (diff) | |
tty/serial: at91: fix typo and indentation
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/serial/atmel_serial.c | 40 |
1 files changed, 22 insertions, 18 deletions
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c index 9e0c63676f0a..846552bff67d 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -738,7 +738,11 @@ static void atmel_complete_tx_dma(void *arg) if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) uart_write_wakeup(port); - /* Do we really need this? */ + /* + * xmit is a circular buffer so, if we have just send data from + * xmit->tail to the end of xmit->buf, now we have to transmit the + * remaining data from the beginning of xmit->buf to xmit->head. + */ if (!uart_circ_empty(xmit)) tasklet_schedule(&atmel_port->tasklet); @@ -797,11 +801,11 @@ static void atmel_tx_dma(struct uart_port *port) BUG_ON(!sg_dma_len(sg)); desc = dmaengine_prep_slave_sg(chan, - sg, - 1, - DMA_MEM_TO_DEV, - DMA_PREP_INTERRUPT | - DMA_CTRL_ACK); + sg, + 1, + DMA_MEM_TO_DEV, + DMA_PREP_INTERRUPT | + DMA_CTRL_ACK); if (!desc) { dev_err(port->dev, "Failed to send via dma!\n"); return; @@ -1025,13 +1029,13 @@ static int atmel_prepare_rx_dma(struct uart_port *port) /* UART circular rx buffer is an aligned page. */ BUG_ON((int)port->state->xmit.buf & ~PAGE_MASK); sg_set_page(&atmel_port->sg_rx, - virt_to_page(ring->buf), - ATMEL_SERIAL_RINGSIZE, - (int)ring->buf & ~PAGE_MASK); - nent = dma_map_sg(port->dev, - &atmel_port->sg_rx, - 1, - DMA_FROM_DEVICE); + virt_to_page(ring->buf), + ATMEL_SERIAL_RINGSIZE, + (int)ring->buf & ~PAGE_MASK); + nent = dma_map_sg(port->dev, + &atmel_port->sg_rx, + 1, + DMA_FROM_DEVICE); if (!nent) { dev_dbg(port->dev, "need to release resource of dma\n"); @@ -1060,11 +1064,11 @@ static int atmel_prepare_rx_dma(struct uart_port *port) * each one is half ring buffer size */ desc = dmaengine_prep_dma_cyclic(atmel_port->chan_rx, - sg_dma_address(&atmel_port->sg_rx), - sg_dma_len(&atmel_port->sg_rx), - sg_dma_len(&atmel_port->sg_rx)/2, - DMA_DEV_TO_MEM, - DMA_PREP_INTERRUPT); + sg_dma_address(&atmel_port->sg_rx), + sg_dma_len(&atmel_port->sg_rx), + sg_dma_len(&atmel_port->sg_rx)/2, + DMA_DEV_TO_MEM, + DMA_PREP_INTERRUPT); desc->callback = atmel_complete_rx_dma; desc->callback_param = port; atmel_port->desc_rx = desc; |