[PATCH] dmaengine: amlogic: Fix regmap error check issue

[Frank Li]

On Fri, Oct 16, 2026 at 03:00:17AM +0000, Xianwei Zhao via B4 Relay wrote:
> From: Xianwei Zhao <xianwei.zhao at amlogic.com>
>
> The func devm_regmap_init_mmio() only returns an error pointer on failure,
> Use IS_ERR() instead to make the intent clearer. And Fix the following
> compilation issue at the same time.
>
> Smatch warnings:
> drivers/dma/amlogic-dma.c:636 aml_dma_probe() warn: passing zero to 'PTR_ERR'
>
> Fixes: b84b5197e344 ("dmaengine: amlogic: Add general DMA driver for A9")
> Reported-by: kernel test robot <lkp at intel.com>
> Closes: https://lore.kernel.org/r/202610080953.C5TYlCaA-lkp@intel.com/
> Reported-by: Dan Carpenter <error27 at gmail.com>
> Signed-off-by: Xianwei Zhao <xianwei.zhao at amlogic.com>
> ---

Reviewed-by: Frank Li <Frank.Li at nxp.com>

> Fix regmap error check issue.
> ---
>  drivers/dma/amlogic-dma.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/dma/amlogic-dma.c b/drivers/dma/amlogic-dma.c
> index 78ee2337ae71..684121d13fca 100644
> --- a/drivers/dma/amlogic-dma.c
> +++ b/drivers/dma/amlogic-dma.c
> @@ -632,7 +632,7 @@ static int aml_dma_probe(struct platform_device *pdev)
>
>  	aml_dma->regmap = devm_regmap_init_mmio(&pdev->dev, aml_dma->base,
>  						&aml_regmap_config);
> -	if (IS_ERR_OR_NULL(aml_dma->regmap))
> +	if (IS_ERR(aml_dma->regmap))
>  		return PTR_ERR(aml_dma->regmap);
>
>  	aml_dma->clk = devm_clk_get_enabled(&pdev->dev, NULL);
>
> ---
> base-commit: 42c31fec1ca76b8b5f7759def122d418dff2cd4b
> change-id: 20261016-fix-a9-dma-complier-178b6e667983
>
> Best regards,
> --
> Xianwei Zhao <xianwei.zhao at amlogic.com>
>
>