linux-kernel - Re: [PATCH 04/11] dmaengine: shdma: remove legacy slave

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Message-ID: <YZIj4iKUsj/QQ+BH@pendragon.ideasonboard.com>
Date:   Mon, 15 Nov 2021 11:09:54 +0200
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     Vinod Koul <vkoul@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Andy Gross <agross@...nel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Baolin Wang <baolin.wang7@...il.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Chunyan Zhang <zhang.lyra@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Hyun Kwon <hyun.kwon@...inx.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Jon Hunter <jonathanh@...dia.com>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Laxman Dewangan <ldewangan@...dia.com>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Mark Brown <broonie@...nel.org>,
        Michal Simek <michal.simek@...inx.com>,
        Nicolas Saenz Julienne <nsaenz@...nel.org>,
        Orson Zhai <orsonzhai@...il.com>,
        Robert Jarzmik <robert.jarzmik@...e.fr>,
        Scott Branden <sbranden@...adcom.com>,
        Takashi Iwai <tiwai@...e.com>,
        Thierry Reding <thierry.reding@...il.com>,
        alsa-devel@...a-project.org, bcm-kernel-feedback-list@...adcom.com,
        dmaengine@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mmc@...r.kernel.org, linux-mtd@...ts.infradead.org,
        linux-rpi-kernel@...ts.infradead.org, linux-serial@...r.kernel.org,
        linux-spi@...r.kernel.org, linux-staging@...ts.linux.dev,
        linux-tegra@...r.kernel.org
Subject: Re: [PATCH 04/11] dmaengine: shdma: remove legacy slave_id parsing

Hi Arnd,

Thank you for the patch.

On Mon, Nov 15, 2021 at 09:53:56AM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> The slave device is picked through either devicetree or a filter
> function, and any remaining out-of-tree drivers would have warned
> about this usage since 2015.
> 
> Stop interpreting the field finally so it can be removed from
> the interface.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

> ---
>  drivers/dma/sh/shdma-base.c | 8 --------
>  1 file changed, 8 deletions(-)
> 
> diff --git a/drivers/dma/sh/shdma-base.c b/drivers/dma/sh/shdma-base.c
> index 7f72b3f4cd1a..41c6bc650fa3 100644
> --- a/drivers/dma/sh/shdma-base.c
> +++ b/drivers/dma/sh/shdma-base.c
> @@ -786,14 +786,6 @@ static int shdma_config(struct dma_chan *chan,
>  	if (!config)
>  		return -EINVAL;
>  
> -	/*
> -	 * overriding the slave_id through dma_slave_config is deprecated,
> -	 * but possibly some out-of-tree drivers still do it.
> -	 */
> -	if (WARN_ON_ONCE(config->slave_id &&
> -			 config->slave_id != schan->real_slave_id))
> -		schan->real_slave_id = config->slave_id;
> -
>  	/*
>  	 * We could lock this, but you shouldn't be configuring the
>  	 * channel, while using it...

-- 
Regards,

Laurent Pinchart