[PATCH v3 4/8] DMA: Freescale: add fsl_dma_free_descriptor() to reduce code duplication
hongbo.zhang at freescale.com
Fri Apr 18 14:09:30 EST 2014
On 04/14/2014 09:40 PM, Andy Shevchenko wrote:
> On Fri, 2014-04-11 at 16:14 +0800, Hongbo Zhang wrote:
>> On 04/10/2014 07:29 PM, Andy Shevchenko wrote:
>>> On Thu, 2014-04-10 at 15:10 +0800, hongbo.zhang at freescale.com wrote:
>>>> @@ -819,8 +826,7 @@ static void fsldma_cleanup_descriptor(struct fsldma_chan *chan,
>>>> - chan_dbg(chan, "LD %p free\n", desc);
>>>> - dma_pool_free(chan->desc_pool, desc, txd->phys);
>>>> + fsl_dma_free_descriptor(chan, desc);
>>> Here is no list_del() call since it's been called in dma_do_tasklet().
>>> What will be the result of double list_del() against the same node?
>> Not clear with your point.
>> This patch is only introducing a common fsl_dma_free_descriptor() to
>> reduce code duplication. And later in the patch 6/8 the
>> fsldma_cleanup_descriptor() is replaced by fsldma_cleanup_descriptorS().
> In the last case you could have a broken kernel which will fails on
> double list_del(). I think it's better to leave this one untouched and
> you may remove it later.
> Or move this patch after you have removed that lines.
Good catch, thank you Andy.
Yes I prefer to leave this untouched and handle it later.
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