linux-kernel - Re: [PATCH v3] SATA: OCTEON: support SATA on OCTEON platform

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Date:	Sun, 08 Mar 2015 23:48:21 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Aleksey Makarov <aleksey.makarov@...iga.com>
Cc:	linux-ide@...r.kernel.org, linux-mips@...ux-mips.org,
	linux-kernel@...r.kernel.org, David Daney <david.daney@...ium.com>,
	Vinita Gupta <vgupta@...iumnetworks.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>, Tejun Heo <tj@...nel.org>,
	Hans de Goede <hdegoede@...hat.com>,
	devicetree@...r.kernel.org
Subject: Re: [PATCH v3] SATA: OCTEON: support SATA on OCTEON platform

On Thursday 05 March 2015 17:58:58 Aleksey Makarov wrote:
> +       ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(64));
> +       if (ret)
> +               return ret;
> 

Don't do this, instead you should set the dma-ranges of the parent
bus correctly so that dma_set_mask_and_coherent succeeds.

dma_coerce_mask_and_coherent() was introduced as a hack to
annotate broken drivers that were overriding the dma_mask pointer
themselves.

	Arnd
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