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spi: img-spfi: Use dma_request_chan() instead dma_request_slave_channel()

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dma_request_slave_channel() is a wrapper on top of dma_request_chan()
eating up the error code.

By using dma_request_chan() directly the driver can support deferred
probing against DMA.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20191212135550.4634-5-peter.ujfalusi@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Peter Ujfalusi 2019-12-12 15:55:45 +02:00 committed by Mark Brown
parent 6133fed053
commit 6bfbf4d0aa
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GPG Key ID: 24D68B725D5487D0
1 changed files with 16 additions and 2 deletions
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18
drivers/spi/spi-img-spfi.c
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@ -666,8 +666,22 @@ static int img_spfi_probe(struct platform_device *pdev)
master->unprepare_message = img_spfi_unprepare;
master->handle_err = img_spfi_handle_err;
spfi->tx_ch = dma_request_slave_channel(spfi->dev, "tx");
spfi->rx_ch = dma_request_slave_channel(spfi->dev, "rx");
spfi->tx_ch = dma_request_chan(spfi->dev, "tx");
if (IS_ERR(spfi->tx_ch)) {
ret = PTR_ERR(spfi->tx_ch);
spfi->tx_ch = NULL;
if (ret == -EPROBE_DEFER)
goto disable_pm;
}
spfi->rx_ch = dma_request_chan(spfi->dev, "rx");
if (IS_ERR(spfi->rx_ch)) {
ret = PTR_ERR(spfi->rx_ch);
spfi->rx_ch = NULL;
if (ret == -EPROBE_DEFER)
goto disable_pm;
}
if (!spfi->tx_ch || !spfi->rx_ch) {
if (spfi->tx_ch)
dma_release_channel(spfi->tx_ch);