crypto: stm32/hash - Use dma_request_chan() instead dma_request_slave_channel() (20aaed22) · Commits · 戴 / test

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>

drivers/crypto/stm32/stm32-hash.c

+3 −3

Original line number	Diff line number	Diff line
		@@ -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);

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