linux-kernel - Re: [PATCH v2 2/2] dmaengine: stm32-mdma: Fix incomplete Hw descriptors allocator

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Message-ID: <20180413040233.GJ6014@localhost>
Date:   Fri, 13 Apr 2018 09:32:33 +0530
From:   Vinod Koul <vinod.koul@...el.com>
To:     Pierre-Yves MORDRET <pierre-yves.mordret@...com>
Cc:     Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Dan Williams <dan.j.williams@...el.com>,
        M'boumba Cedric Madianga <cedric.madianga@...il.com>,
        dmaengine@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] dmaengine: stm32-mdma: Fix incomplete Hw
 descriptors allocator

On Wed, Apr 11, 2018 at 04:44:39PM +0200, Pierre-Yves MORDRET wrote:

>  struct stm32_mdma_desc {
>  	struct virt_dma_desc vdesc;
>  	u32 ccr;
> -	struct stm32_mdma_hwdesc *hwdesc;
> -	dma_addr_t hwdesc_phys;
>  	bool cyclic;
>  	u32 count;
> +	struct stm32_mdma_desc_node node[];

some ppl use node[0] for this but i think either is fine..

>  static void stm32_mdma_dump_hwdesc(struct stm32_mdma_chan *chan,
> -				   struct stm32_mdma_hwdesc *hwdesc)
> +				   struct stm32_mdma_desc_node *node)
>  {
> -	dev_dbg(chan2dev(chan), "CTCR:    0x%08x\n", hwdesc->ctcr);

> +	dev_dbg(chan2dev(chan), "CTCR:    0x%08x\n", node->hwdesc->ctcr);

this is noise for this patch and IIUC you should be able to pass
node->hwdesc and keep fn same?

-- 
~Vinod