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SubjectRe: [PATCH v3 2/2] DMAEngine: Add DMAEngine driver based on old MSM DMA APIs
> [...]
> +
> +struct dma_async_tx_descriptor *msm_dma_prep_interleaved(struct dma_chan *dchan,
> + struct dma_interleaved_template *xt,
> + unsigned long flags, void *context)
> +{
> +
> + struct msm_dma_chan *chan;
> + struct msm_dma_desc_sw *new;
> + struct adm_box_cmd_t *box_cmd_vaddr;
> + u32 *cmd_cntrl = context;
> +
> + if (!dchan)
> + return ERR_PTR(-EINVAL);

This is supposed to return either NULL or a valid descriptor.

> +
> + if (!xt)
> + return ERR_PTR(-EINVAL);
> [...



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