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dmaengine: vchan: add vchan_chan_name() to get channel device name

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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.

Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Amelie Delaunay <amelie.delaunay@foss.st.com> # For STM32
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260909-dma-chan_dev-rename-v4-1-d8fb6892a70f@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Frank Li 2026-09-09 12:22:28 -04:00 committed by Vinod Koul
parent ff4dc66e80
commit 75d8640d7f
5 changed files with 16 additions and 5 deletions
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2
drivers/dma/arm-dma350.c
View File

@ -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);

2
drivers/dma/loongson/loongson2-apb-cmc-dma.c
View File

@ -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;
}

2
drivers/dma/stm32/stm32-dma.c
View File

@ -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",

4
drivers/dma/stm32/stm32-dma3.c
View File

@ -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;
}
}

11
drivers/dma/virt-dma.h
View File

@ -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