Re: [PATCH 12/20] sh: dma: Remove unused dmac_search_free_channel()

Hi Geert,

On Fri, 2024-03-01 at 22:02 +0100, Geert Uytterhoeven wrote:
> arch/sh/drivers/dma/dma-api.c:164:5: warning: no previous prototype for 'dmac_search_free_channel' [-Wmissing-prototypes]
> 
> dmac_search_free_channel() never had a user in upstream, remove it.
> 
> Signed-off-by: Geert Uytterhoeven <[email protected]>
> ---
> dma_extend(), get_dma_info_by_name(), register_chan_caps(), and
> request_dma_bycap() are also unused, but don't trigger warnings
> ---

I assume the other functions didn't trigger a warning because their symbols
were exported. Correct me if I'm wrong.

Adrian

>  arch/sh/drivers/dma/dma-api.c | 27 ---------------------------
>  1 file changed, 27 deletions(-)
> 
> diff --git a/arch/sh/drivers/dma/dma-api.c b/arch/sh/drivers/dma/dma-api.c
> index 89cd4a3b4ccafbe2..f49097fa634c36d4 100644
> --- a/arch/sh/drivers/dma/dma-api.c
> +++ b/arch/sh/drivers/dma/dma-api.c
> @@ -161,33 +161,6 @@ int request_dma_bycap(const char **dmac, const char **caps, const char *dev_id)
>  }
>  EXPORT_SYMBOL(request_dma_bycap);
>  
> -int dmac_search_free_channel(const char *dev_id)
> -{
> -	struct dma_channel *channel = { 0 };
> -	struct dma_info *info = get_dma_info(0);
> -	int i;
> -
> -	for (i = 0; i < info->nr_channels; i++) {
> -		channel = &info->channels[i];
> -		if (unlikely(!channel))
> -			return -ENODEV;
> -
> -		if (atomic_read(&channel->busy) == 0)
> -			break;
> -	}
> -
> -	if (info->ops->request) {
> -		int result = info->ops->request(channel);
> -		if (result)
> -			return result;
> -
> -		atomic_set(&channel->busy, 1);
> -		return channel->chan;
> -	}
> -
> -	return -ENOSYS;
> -}
> -
>  int request_dma(unsigned int chan, const char *dev_id)
>  {
>  	struct dma_channel *channel = { 0 };

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer
`. `'   Physicist
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