linux-kernel - [PATCH v9 07/11] crypto: qce - Use existing devres APIs in devm_qce_dma

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Message-Id: <20251128-qcom-qce-cmd-descr-v9-7-9a5f72b89722@linaro.org>
Date: Fri, 28 Nov 2025 12:44:05 +0100
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Vinod Koul <vkoul@...nel.org>, Jonathan Corbet <corbet@....net>, 
 Thara Gopinath <thara.gopinath@...il.com>, 
 Herbert Xu <herbert@...dor.apana.org.au>, 
 "David S. Miller" <davem@...emloft.net>, 
 Udit Tiwari <quic_utiwari@...cinc.com>, 
 Daniel Perez-Zoghbi <dperezzo@...cinc.com>, 
 Md Sadre Alam <mdalam@....qualcomm.com>, 
 Dmitry Baryshkov <lumag@...nel.org>
Cc: dmaengine@...r.kernel.org, linux-doc@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org, 
 linux-crypto@...r.kernel.org, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH v9 07/11] crypto: qce - Use existing devres APIs in
 devm_qce_dma_request()

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

Switch to devm_kmalloc() and devm_dma_alloc_chan() in
devm_qce_dma_request(). This allows us to drop two labels and shrink the
function.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 drivers/crypto/qce/dma.c | 39 +++++++++------------------------------
 1 file changed, 9 insertions(+), 30 deletions(-)

diff --git a/drivers/crypto/qce/dma.c b/drivers/crypto/qce/dma.c
index c29b0abe9445381a019e0447d30acfd7319d5c1f..a46264735bb895b6199969e83391383ccbbacc5f 100644
--- a/drivers/crypto/qce/dma.c
+++ b/drivers/crypto/qce/dma.c
@@ -12,47 +12,26 @@

 #define QCE_IGNORE_BUF_SZ		(2 * QCE_BAM_BURST_SIZE)

-static void qce_dma_release(void *data)
-{
-	struct qce_dma_data *dma = data;
-
-	dma_release_channel(dma->txchan);
-	dma_release_channel(dma->rxchan);
-	kfree(dma->result_buf);
-}
-
 int devm_qce_dma_request(struct qce_device *qce)
 {
 	struct qce_dma_data *dma = &qce->dma;
 	struct device *dev = qce->dev;
-	int ret;

-	dma->txchan = dma_request_chan(dev, "tx");
+	dma->txchan = devm_dma_request_chan(dev, "tx");
 	if (IS_ERR(dma->txchan))
 		return dev_err_probe(dev, PTR_ERR(dma->txchan),
 				     "Failed to get TX DMA channel\n");

-	dma->rxchan = dma_request_chan(dev, "rx");
-	if (IS_ERR(dma->rxchan)) {
-		ret = dev_err_probe(dev, PTR_ERR(dma->rxchan),
-				    "Failed to get RX DMA channel\n");
-		goto error_rx;
-	}
+	dma->rxchan = devm_dma_request_chan(dev, "rx");
+	if (IS_ERR(dma->rxchan))
+		return dev_err_probe(dev, PTR_ERR(dma->rxchan),
+				     "Failed to get RX DMA channel\n");

-	dma->result_buf = kmalloc(QCE_RESULT_BUF_SZ + QCE_IGNORE_BUF_SZ,
-				  GFP_KERNEL);
-	if (!dma->result_buf) {
-		ret = -ENOMEM;
-		goto error_nomem;
-	}
+	dma->result_buf = devm_kmalloc(dev, QCE_RESULT_BUF_SZ + QCE_IGNORE_BUF_SZ, GFP_KERNEL);
+	if (!dma->result_buf)
+		return -ENOMEM;

-	return devm_add_action_or_reset(dev, qce_dma_release, dma);
-
-error_nomem:
-	dma_release_channel(dma->rxchan);
-error_rx:
-	dma_release_channel(dma->txchan);
-	return ret;
+	return 0;
 }

 struct scatterlist *

-- 
2.51.0