[PATCH] spi: add null check before pointer dereference

[Andi Shyti]

Hi Gustavo,

>  	desc = dmaengine_prep_slave_sg(dma->ch, sgt->sgl, sgt->nents,
>  				       dma->direction, DMA_PREP_INTERRUPT);
>  
> +	if (!desc) {
> +		dev_err(&sdd->master->dev,
> +			"%s:dmaengine_prep_slave_sg Failed\n", __func__);
> +		return;
> +	}
> +

I'm sorry, I would nack this patch for now. There was a smilar I
sent before, but, as Krzysztof said, this needs more testing and
a proper solution.

That's anyway in my todo list.

Thanks,
Andi