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Subject[PATCH v2 6/8] spi: imx: return error from dma channel request
Date
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


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