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serial: mxs-auart: convert not to use dma_request_slave_channel()

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dma_request_slave_channel() is deprecated. dma_request_chan() should
be used directly instead.

Switch to the preferred function and update the error handling accordingly.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/94812f7063e4db5590254ec45fe9bb3c6569509e.1700410918.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christophe JAILLET 2023-11-19 17:22:20 +01:00 committed by Greg Kroah-Hartman
parent e6cc39486a
commit b49c36e4b2
1 changed files with 10 additions and 4 deletions
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14
drivers/tty/serial/mxs-auart.c
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@ -904,21 +904,27 @@ static void mxs_auart_dma_exit(struct mxs_auart_port *s)
static int mxs_auart_dma_init(struct mxs_auart_port *s)
{
struct dma_chan *chan;
if (auart_dma_enabled(s))
return 0;
/* init for RX */
s->rx_dma_chan = dma_request_slave_channel(s->dev, "rx");
if (!s->rx_dma_chan)
chan = dma_request_chan(s->dev, "rx");
if (IS_ERR(chan))
goto err_out;
s->rx_dma_chan = chan;
s->rx_dma_buf = kzalloc(UART_XMIT_SIZE, GFP_KERNEL | GFP_DMA);
if (!s->rx_dma_buf)
goto err_out;
/* init for TX */
s->tx_dma_chan = dma_request_slave_channel(s->dev, "tx");
if (!s->tx_dma_chan)
chan = dma_request_chan(s->dev, "tx");
if (IS_ERR(chan))
goto err_out;
s->tx_dma_chan = chan;
s->tx_dma_buf = kzalloc(UART_XMIT_SIZE, GFP_KERNEL | GFP_DMA);
if (!s->tx_dma_buf)
goto err_out;