linux-kernel - [PATCH] crypto: img-hash - Use dma_request_chan instead dma_request_slave

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Date:   Tue, 17 Dec 2019 09:33:05 +0200
From:   Peter Ujfalusi <peter.ujfalusi@...com>
To:     <herbert@...dor.apana.org.au>, <davem@...emloft.net>
CC:     <vkoul@...nel.org>, <linux-crypto@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] crypto: img-hash - Use dma_request_chan instead dma_request_slave_channel

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@...com>
---
 drivers/crypto/img-hash.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/crypto/img-hash.c b/drivers/crypto/img-hash.c
index fe4cc8babe1c..25d5227f74a1 100644
--- a/drivers/crypto/img-hash.c
+++ b/drivers/crypto/img-hash.c
@@ -332,10 +332,10 @@ static int img_hash_dma_init(struct img_hash_dev *hdev)
 	struct dma_slave_config dma_conf;
 	int err = -EINVAL;
 
-	hdev->dma_lch = dma_request_slave_channel(hdev->dev, "tx");
-	if (!hdev->dma_lch) {
+	hdev->dma_lch = dma_request_chan(hdev->dev, "tx");
+	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);
 	}
 	dma_conf.direction = DMA_MEM_TO_DEV;
 	dma_conf.dst_addr = hdev->bus_addr;
-- 
Peter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
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