linux-kernel - Re: [PATCH] ARM: dts: fix imx7d boot spi dma setup error

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Date:   Tue, 23 Oct 2018 12:13:03 +0200
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Clark Wang <xiaoning.wang@....com>
Cc:     "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Gavin Schenk <g.schenk@...elmann.de>,
        Oleksij Rempel <ore@...gutronix.de>
Subject: Re: [PATCH] ARM: dts: fix imx7d boot spi dma setup error

On Tue, Oct 23, 2018 at 08:36:17AM +0000, Clark Wang wrote:
> Add dmas and dma-names for ecspi1~4 to fix kernel boot error:
> "spi_imx 30840000.ecspi: dma setup error -19, use pio".

Actually this should not be an error and the message is supposed to say:

	Unable to setup DMA, falling back to PIO

So IMHO this should be downgraded from dev_err to dev_info and reworded.
Maybe even try DMA-setup on devices where it is known to fail and don't
emit a message on -ENODEV at all.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |