linux-kernel - Re: [PATCH v2] dts: Disable DMA support on the BK4 vf610 device's fsl

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Date:   Fri, 25 Oct 2019 16:55:17 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Lukasz Majewski <lukma@...x.de>
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Stefan Agner <stefan@...er.ch>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Robin Murphy <robin.murphy@....com>
Subject: Re: [PATCH v2] dts: Disable DMA support on the BK4 vf610 device's
 fsl_lpuart driver

On Thu, Oct 10, 2019 at 11:08:02AM +0200, Lukasz Majewski wrote:
> This change disables the DMA support (RX/TX) on the NXP's fsl_lpuart
> driver - the PIO mode is used instead. This change is necessary for better
> robustness of BK4's device use cases with many potentially interrupted
> short serial transfers.
> 
> Without it the driver hangs when some distortion happens on UART lines.
> 
> Signed-off-by: Lukasz Majewski <lukma@...x.de>
> Suggested-by: Robin Murphy <robin.murphy@....com>

Subject prefix should be 'ARM: dts: ...'.  I fixed it up and applied the
patch.

Shawn