As dmaengine_prep_slave_sg() is called with the DMA_CTRL_ACK flag set for DMA transmit requests, there's no need to explicitly acknowledge DMA transmit requests in the DMA transmit completion callback. Hence remove the call to async_tx_ack(), and remove the now unused dma_async_tx_descriptor pointer in the sci_port structure. Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> --- v3: - No changes, v2: - New. --- drivers/tty/serial/sh-sci.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 049036dfb6ddf32c..1191a6c486640983 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -104,7 +104,6 @@ struct sci_port { struct dma_chan *chan_rx; #ifdef CONFIG_SERIAL_SH_SCI_DMA - struct dma_async_tx_descriptor *desc_tx; struct dma_async_tx_descriptor *desc_rx[2]; dma_cookie_t cookie_tx; dma_cookie_t cookie_rx[2]; @@ -1285,9 +1284,6 @@ static void sci_dma_tx_complete(void *arg) port->icount.tx += s->tx_dma_len; - async_tx_ack(s->desc_tx); - s->desc_tx = NULL; - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) uart_write_wakeup(port); @@ -1528,7 +1524,6 @@ static void work_fn_tx(struct work_struct *work) DMA_TO_DEVICE); spin_lock_irq(&port->lock); - s->desc_tx = desc; desc->callback = sci_dma_tx_complete; desc->callback_param = s; spin_unlock_irq(&port->lock); -- 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