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

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Date:   Mon, 15 Nov 2021 11:18:47 +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 11/11] dmaengine: remove slave_id config field

Hi Arnd,

Thank you for the patch.

On Mon, Nov 15, 2021 at 09:54:03AM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> All references to the slave_id field have been removed, so
> remove the field as well to prevent new references from
> creeping in again.

A rationale to explain why the slave_id field shouldn't be used would be
nice.

> Signed-off-by: Arnd Bergmann <arnd@...db.de>

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

> ---
>  include/linux/dmaengine.h | 4 ----
>  1 file changed, 4 deletions(-)
> 
> diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
> index 9000f3ffce8b..0349b35235e6 100644
> --- a/include/linux/dmaengine.h
> +++ b/include/linux/dmaengine.h
> @@ -418,9 +418,6 @@ enum dma_slave_buswidth {
>   * @device_fc: Flow Controller Settings. Only valid for slave channels. Fill
>   * with 'true' if peripheral should be flow controller. Direction will be
>   * selected at Runtime.
> - * @slave_id: Slave requester id. Only valid for slave channels. The dma
> - * slave peripheral will have unique id as dma requester which need to be
> - * pass as slave config.
>   * @peripheral_config: peripheral configuration for programming peripheral
>   * for dmaengine transfer
>   * @peripheral_size: peripheral configuration buffer size
> @@ -448,7 +445,6 @@ struct dma_slave_config {
>  	u32 src_port_window_size;
>  	u32 dst_port_window_size;
>  	bool device_fc;
> -	unsigned int slave_id;
>  	void *peripheral_config;
>  	size_t peripheral_size;
>  };

-- 
Regards,

Laurent Pinchart