[PATCH v3 1/4] dmaengine: vchan: add vchan_chan_name() to get channel device name

[Frank.Li@oss.nxp.com]

From: Frank Li <Frank.Li@nxp.com>

Introduce vchan_chan_name() to obtain the DMA channel device name.

Use a dedicated helper instead of directly accessing dma_chan::dev
so callers remain unaffected by an upcoming rename of the struct member.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
 drivers/dma/arm-dma350.c                     |  2 +-
 drivers/dma/loongson/loongson2-apb-cmc-dma.c |  2 +-
 drivers/dma/stm32/stm32-dma.c                |  2 +-
 drivers/dma/stm32/stm32-dma3.c               |  4 ++--
 drivers/dma/virt-dma.h                       | 11 +++++++++++
 5 files changed, 16 insertions(+), 5 deletions(-)

diff --git a/drivers/dma/arm-dma350.c b/drivers/dma/arm-dma350.c
index 09403aca8bb06..52f5242ea3327 100644
--- a/drivers/dma/arm-dma350.c
+++ b/drivers/dma/arm-dma350.c
@@ -512,7 +512,7 @@ static int d350_alloc_chan_resources(struct dma_chan *chan)
 {
 	struct d350_chan *dch = to_d350_chan(chan);
 	int ret = request_irq(dch->irq, d350_irq, IRQF_SHARED,
-			      dev_name(&dch->vc.chan.dev->device), dch);
+			      vchan_chan_name(&dch->vc), dch);
 	if (!ret)
 		writel_relaxed(CH_INTREN_DONE | CH_INTREN_ERR, dch->base + CH_INTREN);
 
diff --git a/drivers/dma/loongson/loongson2-apb-cmc-dma.c b/drivers/dma/loongson/loongson2-apb-cmc-dma.c
index 1c9a542edc859..2f1c8c4fd0654 100644
--- a/drivers/dma/loongson/loongson2-apb-cmc-dma.c
+++ b/drivers/dma/loongson/loongson2-apb-cmc-dma.c
@@ -678,7 +678,7 @@ static int loongson2_cmc_dma_probe(struct platform_device *pdev)
 			return lchan->irq;
 
 		ret = devm_request_irq(dev, lchan->irq, loongson2_cmc_dma_chan_irq, IRQF_SHARED,
-				       dev_name(chan2dev(lchan)), lchan);
+				       vchan_chan_name(&lchan->vchan), lchan);
 		if (ret)
 			return ret;
 	}
diff --git a/drivers/dma/stm32/stm32-dma.c b/drivers/dma/stm32/stm32-dma.c
index d3ad78562a140..3e8151e2ad75a 100644
--- a/drivers/dma/stm32/stm32-dma.c
+++ b/drivers/dma/stm32/stm32-dma.c
@@ -1668,7 +1668,7 @@ static int stm32_dma_probe(struct platform_device *pdev)
 
 		ret = devm_request_irq(&pdev->dev, chan->irq,
 				       stm32_dma_chan_irq, 0,
-				       dev_name(chan2dev(chan)), chan);
+				       vchan_chan_name(&chan->vchan), chan);
 		if (ret) {
 			dev_err(&pdev->dev,
 				"request_irq failed with err %d channel %d\n",
diff --git a/drivers/dma/stm32/stm32-dma3.c b/drivers/dma/stm32/stm32-dma3.c
index 4724e7fa0008e..1ee1bd22703fb 100644
--- a/drivers/dma/stm32/stm32-dma3.c
+++ b/drivers/dma/stm32/stm32-dma3.c
@@ -1892,10 +1892,10 @@ static int stm32_dma3_probe(struct platform_device *pdev)
 		chan->irq = ret;
 
 		ret = devm_request_irq(&pdev->dev, chan->irq, stm32_dma3_chan_irq, 0,
-				       dev_name(chan2dev(chan)), chan);
+				       vchan_chan_name(&chan->vchan), chan);
 		if (ret) {
 			dev_err_probe(&pdev->dev, ret, "Failed to request channel %s IRQ\n",
-				      dev_name(chan2dev(chan)));
+				      vchan_chan_name(&chan->vchan));
 			goto err_clk_disable;
 		}
 	}
diff --git a/drivers/dma/virt-dma.h b/drivers/dma/virt-dma.h
index 59d9eabc8b674..dd023a3831209 100644
--- a/drivers/dma/virt-dma.h
+++ b/drivers/dma/virt-dma.h
@@ -209,6 +209,17 @@ static inline void vchan_free_chan_resources(struct virt_dma_chan *vc)
 	vchan_dma_desc_free_list(vc, &head);
 }
 
+/**
+ * vchan_chan_name - Return vchan DMA channel device name
+ * @vc: virtual channel
+ *
+ * Return: The name of the DMA channel device
+ */
+static inline const char *vchan_chan_name(struct virt_dma_chan *vc)
+{
+	return dma_chan_name(&vc->chan);
+}
+
 /**
  * vchan_synchronize() - synchronize callback execution to the current context
  * @vc: virtual channel to synchronize

-- 
2.43.0