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crypto: stm32/hash - 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>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Peter Ujfalusi 2019-12-17 09:35:06 +02:00 committed by Herbert Xu
parent 8004865c2e
commit 20aaed22fe
1 changed files with 3 additions and 3 deletions
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6
drivers/crypto/stm32/stm32-hash.c
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@ -518,10 +518,10 @@ static int stm32_hash_dma_init(struct stm32_hash_dev *hdev)
dma_conf.dst_maxburst = hdev->dma_maxburst;
dma_conf.device_fc = false;
hdev->dma_lch = dma_request_slave_channel(hdev->dev, "in");
if (!hdev->dma_lch) {
hdev->dma_lch = dma_request_chan(hdev->dev, "in");
if (IS_ERR(hdev->dma_lch)) {
dev_err(hdev->dev, "Couldn't acquire a slave DMA channel.\n");
return -EBUSY;
return PTR_ERR(hdev->dma_lch);
}
err = dmaengine_slave_config(hdev->dma_lch, &dma_conf);