diff mbox

[v2,6/8] spi: imx: return error from dma channel request

Message ID 2d4cc8c07de8e90b76763d2c40aea57c598ee1a1.1442923630.git.anton_bondarenko@mentor.com (mailing list archive)
State New, archived
Headers show

Commit Message

Anton Bondarenko Sept. 25, 2015, 5:57 p.m. UTC 
On SDMA initialization return exactly the same error, which is
reported by dma_request_slave_channel_reason(), it is a preceding
change to defer SPI DMA initialization, if SDMA module is not yet
available.

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Signed-off-by: Anton Bondarenko <anton_bondarenko@mentor.com>
---
 drivers/spi/spi-imx.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

Comments

Robin Gong Sept. 30, 2015, 8:51 a.m. UTC | #1 
On Fri, Sep 25, 2015 at 07:57:13PM +0200, Anton Bondarenko wrote:
> On SDMA initialization return exactly the same error, which is
> reported by dma_request_slave_channel_reason(), it is a preceding
> change to defer SPI DMA initialization, if SDMA module is not yet
> available.
> 
> Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
> Signed-off-by: Anton Bondarenko <anton_bondarenko@mentor.com>
> ---
>  drivers/spi/spi-imx.c | 18 ++++++++++--------
>  1 file changed, 10 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
> index 4b3c16e..44d3cf0 100644
> --- a/drivers/spi/spi-imx.c
> +++ b/drivers/spi/spi-imx.c
> @@ -929,18 +929,20 @@ static int spi_imx_sdma_init(struct device *dev, struct spi_imx_data *spi_imx,
>  	spi_imx->wml = spi_imx_get_fifosize(spi_imx) / 2;
>  
>  	/* Prepare for TX DMA: */
> -	master->dma_tx = dma_request_slave_channel(dev, "tx");
> -	if (!master->dma_tx) {
> -		dev_err(dev, "cannot get the TX DMA channel!\n");
> -		ret = -EINVAL;
> +	master->dma_tx = dma_request_slave_channel_reason(dev, "tx");
> +	if (IS_ERR(master->dma_tx)) {
> +		dev_info(dev, "cannot get the TX DMA channel!\n");
> +		ret = PTR_ERR(master->dma_tx);
> +		master->dma_tx = NULL;
>  		goto err;
>  	}
>  
>  	/* Prepare for RX : */
> -	master->dma_rx = dma_request_slave_channel(dev, "rx");
> -	if (!master->dma_rx) {
> -		dev_dbg(dev, "cannot get the DMA channel.\n");
> -		ret = -EINVAL;
> +	master->dma_rx = dma_request_slave_channel_reason(dev, "rx");
> +	if (IS_ERR(master->dma_rx)) {
> +		dev_info(dev, "cannot get the DMA channel.\n");
> +		ret = PTR_ERR(master->dma_rx);
> +		master->dma_rx = NULL;
>  		goto err;
>  	}
>  
> -- 
> 2.5.2
>
diff mbox

Patch

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 4b3c16e..44d3cf0 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -929,18 +929,20 @@  static int spi_imx_sdma_init(struct device *dev, struct spi_imx_data *spi_imx,
 	spi_imx->wml = spi_imx_get_fifosize(spi_imx) / 2;
 
 	/* Prepare for TX DMA: */
-	master->dma_tx = dma_request_slave_channel(dev, "tx");
-	if (!master->dma_tx) {
-		dev_err(dev, "cannot get the TX DMA channel!\n");
-		ret = -EINVAL;
+	master->dma_tx = dma_request_slave_channel_reason(dev, "tx");
+	if (IS_ERR(master->dma_tx)) {
+		dev_info(dev, "cannot get the TX DMA channel!\n");
+		ret = PTR_ERR(master->dma_tx);
+		master->dma_tx = NULL;
 		goto err;
 	}
 
 	/* Prepare for RX : */
-	master->dma_rx = dma_request_slave_channel(dev, "rx");
-	if (!master->dma_rx) {
-		dev_dbg(dev, "cannot get the DMA channel.\n");
-		ret = -EINVAL;
+	master->dma_rx = dma_request_slave_channel_reason(dev, "rx");
+	if (IS_ERR(master->dma_rx)) {
+		dev_info(dev, "cannot get the DMA channel.\n");
+		ret = PTR_ERR(master->dma_rx);
+		master->dma_rx = NULL;
 		goto err;
 	}