Subject: Re: [PATCH 04/10] dmaengine: fsldma: convert to devm_kzalloc and fix error path

From: Frank Li <[email-masked]>
Date: Fri, 5 Jun 2026 17:43:31 -0500

On Fri, Jun 05, 2026 at 03:01:28PM -0700, Rosen Penev wrote:
>
> Convert fdev allocation from kzalloc_obj to devm_kzalloc to simplify
> the probe error and remove paths by dropping the explicit kfree.
>
> While at it, fix a goto target mismatch introduced in the recent
> platform_get_irq_optional() conversion: goto err_iounmap should
> be goto out_iounmap.

you should fix it at platform_get_irq_optional() conversion patch

Frank
>
> Assisted-by: opencode:big-pickle
> Signed-off-by: Rosen Penev <[email-masked]>
> ---
>  drivers/dma/fsldma.c | 18 ++++++------------
>  1 file changed, 6 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
> index 0d28f8299bf8..2efa16d12679 100644
> --- a/drivers/dma/fsldma.c
> +++ b/drivers/dma/fsldma.c
> @@ -1213,18 +1213,17 @@ static void fsl_dma_chan_remove(struct fsldma_chan *chan)
>
>  static int fsldma_of_probe(struct platform_device *op)
>  {
> +       struct device *dev = &op->dev;
>         struct fsldma_device *fdev;
>         struct device_node *child;
>         unsigned int i;
>         int err;
>
> -       fdev = kzalloc_obj(*fdev);
> -       if (!fdev) {
> -               err = -ENOMEM;
> -               goto out_return;
> -       }
> +       fdev = devm_kzalloc(dev, sizeof(*fdev), GFP_KERNEL);
> +       if (!fdev)
> +               return -ENOMEM;
>
> -       fdev->dev = &op->dev;
> +       fdev->dev = dev;
>         INIT_LIST_HEAD(&fdev->common.channels);
>         /* The DMA address bits supported for this device. */
>         fdev->addr_bits = (long)device_get_match_data(fdev->dev);
> @@ -1233,8 +1232,7 @@ static int fsldma_of_probe(struct platform_device *op)
>         fdev->regs = of_iomap(op->dev.of_node, 0);
>         if (!fdev->regs) {
>                 dev_err(&op->dev, "unable to ioremap registers\n");
> -               err = -ENOMEM;
> -               goto out_free;
> +               return -ENOMEM;
>         }
>
>         /* map the channel IRQ if it exists, but don't hookup the handler yet */
> @@ -1313,9 +1311,6 @@ static int fsldma_of_probe(struct platform_device *op)
>         }
>  out_iounmap:
>         iounmap(fdev->regs);
> -out_free:
> -       kfree(fdev);
> -out_return:
>         return err;
>  }
>
> @@ -1335,7 +1330,6 @@ static void fsldma_of_remove(struct platform_device *op)
>         }
>
>         iounmap(fdev->regs);
> -       kfree(fdev);
>  }
>
>  #ifdef CONFIG_PM
> --
> 2.54.0
>