linux-kernel - Re: [PATCH 07/11] dmaengine: imx-sdma: make use of dev_err

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Message-ID: <20250910120559.u4gmegcrrpe6qvrf@pengutronix.de>
Date: Wed, 10 Sep 2025 14:05:59 +0200
From: Marco Felsch <m.felsch@...gutronix.de>
To: Frank Li <Frank.li@....com>
Cc: Vinod Koul <vkoul@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Jiada Wang <jiada_wang@...tor.com>, dmaengine@...r.kernel.org,
	imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 07/11] dmaengine: imx-sdma: make use of dev_err_probe()

On 25-09-03, Frank Li wrote:
> On Wed, Sep 03, 2025 at 03:06:15PM +0200, Marco Felsch wrote:
> > Convert the probe function to dev_err_probe() which helps users to
> > identify issues better.
> 
> I think it is not "convert"
> 
> Add dev_err_probe() at return path of probe to help user to ...

Done, thanks.


> Reviewed-by: Frank Li <Frank.Li@....com>
> >
> > Signed-off-by: Marco Felsch <m.felsch@...gutronix.de>
> > ---
> >  drivers/dma/imx-sdma.c | 28 ++++++++++++----------------
> >  1 file changed, 12 insertions(+), 16 deletions(-)
> >
> > diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
> > index f6bb2f88a62781c0431336c365fa30c46f1401ad..e30dd46cf6522ee2aa4d3aca9868a01afbd29615 100644
> > --- a/drivers/dma/imx-sdma.c
> > +++ b/drivers/dma/imx-sdma.c
> > @@ -2255,7 +2255,7 @@ static int sdma_probe(struct platform_device *pdev)
> >
> >  	ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
> >  	if (ret)
> > -		return ret;
> > +		return dev_err_probe(dev, ret, "Failed to set DMA mask\n");
> >
> >  	sdma = devm_kzalloc(dev, sizeof(*sdma), GFP_KERNEL);
> >  	if (!sdma)
> > @@ -2272,24 +2272,24 @@ static int sdma_probe(struct platform_device *pdev)
> >
> >  	irq = platform_get_irq(pdev, 0);
> >  	if (irq < 0)
> > -		return irq;
> > +		return dev_err_probe(dev, irq, "Failed to get IRQ\n");
> >
> >  	sdma->regs = devm_platform_ioremap_resource(pdev, 0);
> >  	if (IS_ERR(sdma->regs))
> > -		return PTR_ERR(sdma->regs);
> > +		return dev_err_probe(dev, PTR_ERR(sdma->regs), "ioremap failed\n");
> >
> >  	sdma->clk_ipg = devm_clk_get_prepared(dev, "ipg");
> >  	if (IS_ERR(sdma->clk_ipg))
> > -		return PTR_ERR(sdma->clk_ipg);
> > +		return dev_err_probe(dev, PTR_ERR(sdma->clk_ipg), "IPG clk_get_prepared failed\n");
> >
> >  	sdma->clk_ahb = devm_clk_get_prepared(dev, "ahb");
> >  	if (IS_ERR(sdma->clk_ahb))
> > -		return PTR_ERR(sdma->clk_ahb);
> > +		return dev_err_probe(dev, PTR_ERR(sdma->clk_ahb), "AHB clk_get_prepared failed\n");
> >
> >  	ret = devm_request_irq(dev, irq, sdma_int_handler, 0,
> >  			       dev_name(dev), sdma);
> >  	if (ret)
> > -		return ret;
> > +		return dev_err_probe(dev, ret, "Failed to request IRQ\n");
> >
> >  	sdma->irq = irq;
> >
> > @@ -2330,11 +2330,11 @@ static int sdma_probe(struct platform_device *pdev)
> >
> >  	ret = sdma_init(sdma);
> >  	if (ret)
> > -		return ret;
> > +		return dev_err_probe(dev, ret, "sdma_init failed\n");
> >
> >  	ret = sdma_event_remap(sdma);
> >  	if (ret)
> > -		return ret;
> > +		return dev_err_probe(dev, ret, "sdma_event_remap failed\n");
> >
> >  	if (sdma->drvdata->script_addrs)
> >  		sdma_add_scripts(sdma, sdma->drvdata->script_addrs);
> > @@ -2361,18 +2361,14 @@ static int sdma_probe(struct platform_device *pdev)
> >  	platform_set_drvdata(pdev, sdma);
> >
> >  	ret = dma_async_device_register(&sdma->dma_device);
> > -	if (ret) {
> > -		dev_err(dev, "unable to register\n");
> > -		return ret;
> > -	}
> > +	if (ret)
> > +		return dev_err_probe(dev, ret, "unable to register\n");
> >
> >  	devm_add_action_or_reset(dev, sdma_dma_device_unregister_action, sdma);
> >
> >  	ret = of_dma_controller_register(np, sdma_xlate, sdma);
> > -	if (ret) {
> > -		dev_err(dev, "failed to register controller\n");
> > -		return ret;
> > -	}
> > +	if (ret)
> > +		return dev_err_probe(dev, ret, "failed to register controller\n");
> >
> >  	spba_bus = of_find_compatible_node(NULL, NULL, "fsl,spba-bus");
> >  	ret = of_address_to_resource(spba_bus, 0, &spba_res);
> >
> > --
> > 2.47.2
> >
>