[PATCH v2 1/2] dmaengine: Add cleanup FREE defines for dma_async_tx_descriptor

[Dave Jiang]

On 10/3/25 9:26 AM, Frank Li wrote:
> Add cleanup FREE defines for dma_async_tx_descriptor to support automatic
> cleanup and simplify error handling.
> 
> Signed-off-by: Frank Li <Frank.Li at nxp.com>
> ---
> Check patch report exceed 100 chars, but it's still better put into one
> line to keep consistent with other DEFINE_FREE and better readablity
> 
> change in v2
> - remove surpoiouse remove empty line
> ---
>  include/linux/dmaengine.h | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
> index 99efe2b9b4ea9844ca6161208362ef18ef111d96..27fa1646a807c49c781e1bce9e3e7d9a3c66f41d 100644
> --- a/include/linux/dmaengine.h
> +++ b/include/linux/dmaengine.h
> @@ -5,6 +5,7 @@
>  #ifndef LINUX_DMAENGINE_H
>  #define LINUX_DMAENGINE_H
>  
> +#include <linux/cleanup.h>
>  #include <linux/device.h>
>  #include <linux/err.h>
>  #include <linux/uio.h>
> @@ -1612,6 +1613,8 @@ static inline int dmaengine_desc_free(struct dma_async_tx_descriptor *desc)
>  	return desc->desc_free(desc);
>  }
>  
> +DEFINE_FREE(dma_async_tx_descriptor, struct dma_async_tx_descriptor *, if (_T) dmaengine_desc_free(_T))

maybe free_dma_async_tx may be clearer as the name vs dma_async_tx_descriptor.

DJ

> +
>  /* --- DMA device --- */
>  
>  int dma_async_device_register(struct dma_device *device);
>